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Server functionality for HBase
/**
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hbase.regionserver;
import java.io.IOException;
import java.io.InterruptedIOException;
import java.lang.Math;
import java.lang.Thread.UncaughtExceptionHandler;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.management.ManagementFactory;
import java.lang.management.MemoryUsage;
import java.lang.reflect.Constructor;
import java.net.BindException;
import java.net.InetSocketAddress;
import java.net.UnknownHostException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.NavigableMap;
import java.util.Random;
import java.util.Set;
import java.util.SortedMap;
import java.util.TreeMap;
import java.util.TreeSet;
import java.util.concurrent.atomic.AtomicLong;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.ConcurrentSkipListMap;
import java.util.concurrent.locks.ReentrantReadWriteLock;
import javax.management.ObjectName;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.collect.Maps;
import org.apache.hadoop.hbase.util.ByteStringer;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hbase.Cell;
import org.apache.hadoop.hbase.CellScannable;
import org.apache.hadoop.hbase.CellScanner;
import org.apache.hadoop.hbase.CellUtil;
import org.apache.hadoop.hbase.Chore;
import org.apache.hadoop.hbase.ClockOutOfSyncException;
import org.apache.hadoop.hbase.DoNotRetryIOException;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.HBaseIOException;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.HRegionInfo;
import org.apache.hadoop.hbase.HTableDescriptor;
import org.apache.hadoop.hbase.HealthCheckChore;
import org.apache.hadoop.hbase.KeyValue;
import org.apache.hadoop.hbase.KeyValueUtil;
import org.apache.hadoop.hbase.NotServingRegionException;
import org.apache.hadoop.hbase.RemoteExceptionHandler;
import org.apache.hadoop.hbase.ServerName;
import org.apache.hadoop.hbase.Stoppable;
import org.apache.hadoop.hbase.TableDescriptors;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.UnknownScannerException;
import org.apache.hadoop.hbase.YouAreDeadException;
import org.apache.hadoop.hbase.ZNodeClearer;
import org.apache.hadoop.hbase.catalog.CatalogTracker;
import org.apache.hadoop.hbase.catalog.MetaEditor;
import org.apache.hadoop.hbase.catalog.MetaReader;
import org.apache.hadoop.hbase.client.Append;
import org.apache.hadoop.hbase.client.Delete;
import org.apache.hadoop.hbase.client.Get;
import org.apache.hadoop.hbase.client.HConnectionManager;
import org.apache.hadoop.hbase.client.Increment;
import org.apache.hadoop.hbase.client.Mutation;
import org.apache.hadoop.hbase.client.Put;
import org.apache.hadoop.hbase.client.Result;
import org.apache.hadoop.hbase.client.RowMutations;
import org.apache.hadoop.hbase.client.Scan;
import org.apache.hadoop.hbase.coprocessor.CoprocessorHost;
import org.apache.hadoop.hbase.DroppedSnapshotException;
import org.apache.hadoop.hbase.exceptions.FailedSanityCheckException;
import org.apache.hadoop.hbase.exceptions.OperationConflictException;
import org.apache.hadoop.hbase.exceptions.OutOfOrderScannerNextException;
import org.apache.hadoop.hbase.exceptions.RegionMovedException;
import org.apache.hadoop.hbase.exceptions.RegionOpeningException;
import org.apache.hadoop.hbase.exceptions.UnknownProtocolException;
import org.apache.hadoop.hbase.executor.ExecutorService;
import org.apache.hadoop.hbase.executor.ExecutorType;
import org.apache.hadoop.hbase.filter.ByteArrayComparable;
import org.apache.hadoop.hbase.filter.CompareFilter.CompareOp;
import org.apache.hadoop.hbase.fs.HFileSystem;
import org.apache.hadoop.hbase.io.hfile.CacheConfig;
import org.apache.hadoop.hbase.io.hfile.HFile;
import org.apache.hadoop.hbase.ipc.HBaseRPCErrorHandler;
import org.apache.hadoop.hbase.ipc.PayloadCarryingRpcController;
import org.apache.hadoop.hbase.ipc.PriorityFunction;
import org.apache.hadoop.hbase.ipc.RpcCallContext;
import org.apache.hadoop.hbase.ipc.RpcClient;
import org.apache.hadoop.hbase.ipc.RpcServer;
import org.apache.hadoop.hbase.ipc.RpcServer.BlockingServiceAndInterface;
import org.apache.hadoop.hbase.ipc.RpcServerInterface;
import org.apache.hadoop.hbase.ipc.ServerNotRunningYetException;
import org.apache.hadoop.hbase.ipc.ServerRpcController;
import org.apache.hadoop.hbase.master.RegionState.State;
import org.apache.hadoop.hbase.master.SplitLogManager;
import org.apache.hadoop.hbase.master.TableLockManager;
import org.apache.hadoop.hbase.procedure.RegionServerProcedureManagerHost;
import org.apache.hadoop.hbase.protobuf.ProtobufUtil;
import org.apache.hadoop.hbase.protobuf.RequestConverter;
import org.apache.hadoop.hbase.protobuf.ResponseConverter;
import org.apache.hadoop.hbase.protobuf.generated.AdminProtos;
import org.apache.hadoop.hbase.protobuf.generated.AdminProtos.CloseRegionRequest;
import org.apache.hadoop.hbase.protobuf.generated.AdminProtos.CloseRegionResponse;
import org.apache.hadoop.hbase.protobuf.generated.AdminProtos.CompactRegionRequest;
import org.apache.hadoop.hbase.protobuf.generated.AdminProtos.CompactRegionResponse;
import org.apache.hadoop.hbase.protobuf.generated.AdminProtos.FlushRegionRequest;
import org.apache.hadoop.hbase.protobuf.generated.AdminProtos.FlushRegionResponse;
import org.apache.hadoop.hbase.protobuf.generated.AdminProtos.GetOnlineRegionRequest;
import org.apache.hadoop.hbase.protobuf.generated.AdminProtos.GetOnlineRegionResponse;
import org.apache.hadoop.hbase.protobuf.generated.AdminProtos.GetRegionInfoRequest;
import org.apache.hadoop.hbase.protobuf.generated.AdminProtos.GetRegionInfoResponse;
import org.apache.hadoop.hbase.protobuf.generated.AdminProtos.GetServerInfoRequest;
import org.apache.hadoop.hbase.protobuf.generated.AdminProtos.GetServerInfoResponse;
import org.apache.hadoop.hbase.protobuf.generated.AdminProtos.GetStoreFileRequest;
import org.apache.hadoop.hbase.protobuf.generated.AdminProtos.GetStoreFileResponse;
import org.apache.hadoop.hbase.protobuf.generated.AdminProtos.MergeRegionsRequest;
import org.apache.hadoop.hbase.protobuf.generated.AdminProtos.MergeRegionsResponse;
import org.apache.hadoop.hbase.protobuf.generated.AdminProtos.OpenRegionRequest;
import org.apache.hadoop.hbase.protobuf.generated.AdminProtos.OpenRegionRequest.RegionOpenInfo;
import org.apache.hadoop.hbase.protobuf.generated.AdminProtos.OpenRegionResponse;
import org.apache.hadoop.hbase.protobuf.generated.AdminProtos.OpenRegionResponse.RegionOpeningState;
import org.apache.hadoop.hbase.protobuf.generated.AdminProtos.ReplicateWALEntryRequest;
import org.apache.hadoop.hbase.protobuf.generated.AdminProtos.ReplicateWALEntryResponse;
import org.apache.hadoop.hbase.protobuf.generated.AdminProtos.RollWALWriterRequest;
import org.apache.hadoop.hbase.protobuf.generated.AdminProtos.RollWALWriterResponse;
import org.apache.hadoop.hbase.protobuf.generated.AdminProtos.SplitRegionRequest;
import org.apache.hadoop.hbase.protobuf.generated.AdminProtos.SplitRegionResponse;
import org.apache.hadoop.hbase.protobuf.generated.AdminProtos.StopServerRequest;
import org.apache.hadoop.hbase.protobuf.generated.AdminProtos.StopServerResponse;
import org.apache.hadoop.hbase.protobuf.generated.AdminProtos.UpdateFavoredNodesRequest;
import org.apache.hadoop.hbase.protobuf.generated.AdminProtos.UpdateFavoredNodesResponse;
import org.apache.hadoop.hbase.protobuf.generated.AdminProtos.WALEntry;
import org.apache.hadoop.hbase.protobuf.generated.ClientProtos;
import org.apache.hadoop.hbase.protobuf.generated.ClientProtos.BulkLoadHFileRequest;
import org.apache.hadoop.hbase.protobuf.generated.ClientProtos.BulkLoadHFileRequest.FamilyPath;
import org.apache.hadoop.hbase.protobuf.generated.ClientProtos.BulkLoadHFileResponse;
import org.apache.hadoop.hbase.protobuf.generated.ClientProtos.Condition;
import org.apache.hadoop.hbase.protobuf.generated.ClientProtos.CoprocessorServiceCall;
import org.apache.hadoop.hbase.protobuf.generated.ClientProtos.CoprocessorServiceRequest;
import org.apache.hadoop.hbase.protobuf.generated.ClientProtos.CoprocessorServiceResponse;
import org.apache.hadoop.hbase.protobuf.generated.ClientProtos.GetRequest;
import org.apache.hadoop.hbase.protobuf.generated.ClientProtos.GetResponse;
import org.apache.hadoop.hbase.protobuf.generated.ClientProtos.MultiRequest;
import org.apache.hadoop.hbase.protobuf.generated.ClientProtos.MultiResponse;
import org.apache.hadoop.hbase.protobuf.generated.ClientProtos.MutateRequest;
import org.apache.hadoop.hbase.protobuf.generated.ClientProtos.MutateResponse;
import org.apache.hadoop.hbase.protobuf.generated.ClientProtos.MutationProto;
import org.apache.hadoop.hbase.protobuf.generated.ClientProtos.MutationProto.MutationType;
import org.apache.hadoop.hbase.protobuf.generated.ClientProtos.RegionAction;
import org.apache.hadoop.hbase.protobuf.generated.ClientProtos.RegionActionResult;
import org.apache.hadoop.hbase.protobuf.generated.ClientProtos.ResultOrException;
import org.apache.hadoop.hbase.protobuf.generated.ClientProtos.ScanRequest;
import org.apache.hadoop.hbase.protobuf.generated.ClientProtos.ScanResponse;
import org.apache.hadoop.hbase.protobuf.generated.ClusterStatusProtos;
import org.apache.hadoop.hbase.protobuf.generated.ClusterStatusProtos.RegionLoad;
import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.Coprocessor;
import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.Coprocessor.Builder;
import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.NameStringPair;
import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.RegionServerInfo;
import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.RegionSpecifier;
import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.RegionSpecifier.RegionSpecifierType;
import org.apache.hadoop.hbase.protobuf.generated.RPCProtos.RequestHeader;
import org.apache.hadoop.hbase.protobuf.generated.RegionServerStatusProtos.GetLastFlushedSequenceIdRequest;
import org.apache.hadoop.hbase.protobuf.generated.RegionServerStatusProtos.RegionServerReportRequest;
import org.apache.hadoop.hbase.protobuf.generated.RegionServerStatusProtos.RegionServerStartupRequest;
import org.apache.hadoop.hbase.protobuf.generated.RegionServerStatusProtos.RegionServerStartupResponse;
import org.apache.hadoop.hbase.protobuf.generated.RegionServerStatusProtos.RegionServerStatusService;
import org.apache.hadoop.hbase.protobuf.generated.RegionServerStatusProtos.RegionStateTransition;
import org.apache.hadoop.hbase.protobuf.generated.RegionServerStatusProtos.RegionStateTransition.TransitionCode;
import org.apache.hadoop.hbase.protobuf.generated.RegionServerStatusProtos.ReportRSFatalErrorRequest;
import org.apache.hadoop.hbase.protobuf.generated.RegionServerStatusProtos.ReportRegionStateTransitionRequest;
import org.apache.hadoop.hbase.protobuf.generated.RegionServerStatusProtos.ReportRegionStateTransitionResponse;
import org.apache.hadoop.hbase.protobuf.generated.WALProtos.CompactionDescriptor;
import org.apache.hadoop.hbase.regionserver.HRegion.Operation;
import org.apache.hadoop.hbase.regionserver.Leases.LeaseStillHeldException;
import org.apache.hadoop.hbase.regionserver.compactions.CompactionProgress;
import org.apache.hadoop.hbase.regionserver.handler.CloseMetaHandler;
import org.apache.hadoop.hbase.regionserver.handler.CloseRegionHandler;
import org.apache.hadoop.hbase.regionserver.handler.OpenMetaHandler;
import org.apache.hadoop.hbase.regionserver.handler.OpenRegionHandler;
import org.apache.hadoop.hbase.regionserver.wal.HLog;
import org.apache.hadoop.hbase.regionserver.wal.HLogFactory;
import org.apache.hadoop.hbase.regionserver.wal.HLogKey;
import org.apache.hadoop.hbase.regionserver.wal.HLogSplitter;
import org.apache.hadoop.hbase.regionserver.wal.HLogUtil;
import org.apache.hadoop.hbase.regionserver.wal.WALActionsListener;
import org.apache.hadoop.hbase.regionserver.wal.WALEdit;
import org.apache.hadoop.hbase.replication.regionserver.ReplicationLoad;
import org.apache.hadoop.hbase.security.Superusers;
import org.apache.hadoop.hbase.security.UserProvider;
import org.apache.hadoop.hbase.trace.SpanReceiverHost;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.hadoop.hbase.util.CompressionTest;
import org.apache.hadoop.hbase.util.ConfigUtil;
import org.apache.hadoop.hbase.util.DNS;
import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;
import org.apache.hadoop.hbase.util.FSTableDescriptors;
import org.apache.hadoop.hbase.util.FSUtils;
import org.apache.hadoop.hbase.util.InfoServer;
import org.apache.hadoop.hbase.util.JvmPauseMonitor;
import org.apache.hadoop.hbase.util.Pair;
import org.apache.hadoop.hbase.util.Sleeper;
import org.apache.hadoop.hbase.util.Strings;
import org.apache.hadoop.hbase.util.Threads;
import org.apache.hadoop.hbase.util.VersionInfo;
import org.apache.hadoop.hbase.zookeeper.ClusterStatusTracker;
import org.apache.hadoop.hbase.zookeeper.MasterAddressTracker;
import org.apache.hadoop.hbase.zookeeper.MetaRegionTracker;
import org.apache.hadoop.hbase.zookeeper.RecoveringRegionWatcher;
import org.apache.hadoop.hbase.zookeeper.ZKClusterId;
import org.apache.hadoop.hbase.zookeeper.ZKUtil;
import org.apache.hadoop.hbase.zookeeper.ZooKeeperNodeTracker;
import org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher;
import org.apache.hadoop.ipc.RemoteException;
import org.apache.hadoop.metrics.util.MBeanUtil;
import org.apache.hadoop.util.ReflectionUtils;
import org.apache.hadoop.util.StringUtils;
import org.apache.zookeeper.KeeperException;
import org.apache.zookeeper.KeeperException.NoNodeException;
import org.apache.zookeeper.data.Stat;
import org.cliffc.high_scale_lib.Counter;
import com.google.protobuf.BlockingRpcChannel;
import com.google.protobuf.ByteString;
import com.google.protobuf.Descriptors;
import com.google.protobuf.Message;
import com.google.protobuf.RpcCallback;
import com.google.protobuf.RpcController;
import com.google.protobuf.Service;
import com.google.protobuf.ServiceException;
import com.google.protobuf.TextFormat;
/**
* HRegionServer makes a set of HRegions available to clients. It checks in with
* the HMaster. There are many HRegionServers in a single HBase deployment.
*/
@InterfaceAudience.Private
@SuppressWarnings("deprecation")
public class HRegionServer implements ClientProtos.ClientService.BlockingInterface,
AdminProtos.AdminService.BlockingInterface, Runnable, RegionServerServices,
HBaseRPCErrorHandler, LastSequenceId {
public static final Log LOG = LogFactory.getLog(HRegionServer.class);
private final Random rand;
private final AtomicLong scannerIdGen = new AtomicLong(0L);
/*
* Strings to be used in forming the exception message for
* RegionsAlreadyInTransitionException.
*/
protected static final String OPEN = "OPEN";
protected static final String CLOSE = "CLOSE";
//RegionName vs current action in progress
//true - if open region action in progress
//false - if close region action in progress
protected final ConcurrentMap regionsInTransitionInRS =
new ConcurrentSkipListMap(Bytes.BYTES_COMPARATOR);
/** RPC scheduler to use for the region server. */
public static final String REGION_SERVER_RPC_SCHEDULER_FACTORY_CLASS =
"hbase.region.server.rpc.scheduler.factory.class";
protected long maxScannerResultSize;
// Cache flushing
protected MemStoreFlusher cacheFlusher;
protected HeapMemoryManager hMemManager;
// catalog tracker
protected CatalogTracker catalogTracker;
// Watch if a region is out of recovering state from ZooKeeper
@SuppressWarnings("unused")
private RecoveringRegionWatcher recoveringRegionWatcher;
/**
* Go here to get table descriptors.
*/
protected TableDescriptors tableDescriptors;
// Replication services. If no replication, this handler will be null.
protected ReplicationSourceService replicationSourceHandler;
protected ReplicationSinkService replicationSinkHandler;
// Compactions
public CompactSplitThread compactSplitThread;
final ConcurrentHashMap scanners =
new ConcurrentHashMap();
/**
* Map of regions currently being served by this region server. Key is the
* encoded region name. All access should be synchronized.
*/
protected final Map onlineRegions =
new ConcurrentHashMap();
/**
* Map of encoded region names to the DataNode locations they should be hosted on
* We store the value as InetSocketAddress since this is used only in HDFS
* API (create() that takes favored nodes as hints for placing file blocks).
* We could have used ServerName here as the value class, but we'd need to
* convert it to InetSocketAddress at some point before the HDFS API call, and
* it seems a bit weird to store ServerName since ServerName refers to RegionServers
* and here we really mean DataNode locations.
*/
protected final Map regionFavoredNodesMap =
new ConcurrentHashMap();
/**
* Set of regions currently being in recovering state which means it can accept writes(edits from
* previous failed region server) but not reads. A recovering region is also an online region.
*/
protected final Map recoveringRegions = Collections
.synchronizedMap(new HashMap());
// Leases
protected Leases leases;
// Instance of the hbase executor service.
protected ExecutorService service;
// Request counter. (Includes requests that are not serviced by regions.)
final Counter requestCount = new Counter();
// If false, the file system has become unavailable
protected volatile boolean fsOk;
protected HFileSystem fs;
// Set when a report to the master comes back with a message asking us to
// shutdown. Also set by call to stop when debugging or running unit tests
// of HRegionServer in isolation.
protected volatile boolean stopped = false;
// Go down hard. Used if file system becomes unavailable and also in
// debugging and unit tests.
protected volatile boolean abortRequested;
// region server static info like info port
private RegionServerInfo.Builder rsInfo;
ConcurrentMap rowlocks = new ConcurrentHashMap();
// A state before we go into stopped state. At this stage we're closing user
// space regions.
private boolean stopping = false;
private volatile boolean killed = false;
protected final Configuration conf;
private Path rootDir;
protected final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
final int numRetries;
protected final int threadWakeFrequency;
private final int msgInterval;
protected final int numRegionsToReport;
// Stub to do region server status calls against the master.
private volatile RegionServerStatusService.BlockingInterface rssStub;
// RPC client. Used to make the stub above that does region server status checking.
RpcClient rpcClient;
// Server to handle client requests. Default access so can be accessed by
// unit tests.
RpcServerInterface rpcServer;
private final InetSocketAddress isa;
private UncaughtExceptionHandler uncaughtExceptionHandler;
// Info server. Default access so can be used by unit tests. REGIONSERVER
// is name of the webapp and the attribute name used stuffing this instance
// into web context.
InfoServer infoServer;
private JvmPauseMonitor pauseMonitor;
/** region server process name */
public static final String REGIONSERVER = "regionserver";
/** region server configuration name */
public static final String REGIONSERVER_CONF = "regionserver_conf";
private MetricsRegionServer metricsRegionServer;
private SpanReceiverHost spanReceiverHost;
/*
* Check for compactions requests.
*/
Chore compactionChecker;
/*
* Check for flushes
*/
Chore periodicFlusher;
// HLog and HLog roller. log is protected rather than private to avoid
// eclipse warning when accessed by inner classes
protected volatile HLog hlog;
// The meta updates are written to a different hlog. If this
// regionserver holds meta regions, then this field will be non-null.
protected volatile HLog hlogForMeta;
LogRoller hlogRoller;
LogRoller metaHLogRoller;
// flag set after we're done setting up server threads (used for testing)
protected volatile boolean isOnline;
// zookeeper connection and watcher
private ZooKeeperWatcher zooKeeper;
// master address tracker
private MasterAddressTracker masterAddressTracker;
// Cluster Status Tracker
private ClusterStatusTracker clusterStatusTracker;
// Log Splitting Worker
private SplitLogWorker splitLogWorker;
// A sleeper that sleeps for msgInterval.
private final Sleeper sleeper;
private final int rpcTimeout;
private final RegionServerAccounting regionServerAccounting;
// Cache configuration and block cache reference
final CacheConfig cacheConfig;
/** The health check chore. */
private HealthCheckChore healthCheckChore;
/** The nonce manager chore. */
private Chore nonceManagerChore;
private Map coprocessorServiceHandlers = Maps.newHashMap();
/**
* The server name the Master sees us as. Its made from the hostname the
* master passes us, port, and server startcode. Gets set after registration
* against Master. The hostname can differ from the hostname in {@link #isa}
* but usually doesn't if both servers resolve .
*/
private ServerName serverNameFromMasterPOV;
/**
* This servers startcode.
*/
private final long startcode;
/**
* Unique identifier for the cluster we are a part of.
*/
private String clusterId;
/**
* MX Bean for RegionServerInfo
*/
private ObjectName mxBean = null;
/**
* Chore to clean periodically the moved region list
*/
private MovedRegionsCleaner movedRegionsCleaner;
/**
* The lease timeout period for client scanners (milliseconds).
*/
private final int scannerLeaseTimeoutPeriod;
/**
* The reference to the priority extraction function
*/
private final PriorityFunction priority;
private RegionServerCoprocessorHost rsHost;
private RegionServerProcedureManagerHost rspmHost;
// Table level lock manager for locking for region operations
private TableLockManager tableLockManager;
private final boolean useZKForAssignment;
// Used for 11059
private ServerName serverName;
/**
* Nonce manager. Nonces are used to make operations like increment and append idempotent
* in the case where client doesn't receive the response from a successful operation and
* retries. We track the successful ops for some time via a nonce sent by client and handle
* duplicate operations (currently, by failing them; in future we might use MVCC to return
* result). Nonces are also recovered from WAL during, recovery; however, the caveats (from
* HBASE-3787) are:
* - WAL recovery is optimized, and under high load we won't read nearly nonce-timeout worth
* of past records. If we don't read the records, we don't read and recover the nonces.
* Some WALs within nonce-timeout at recovery may not even be present due to rolling/cleanup.
* - There's no WAL recovery during normal region move, so nonces will not be transfered.
* We can have separate additional "Nonce WAL". It will just contain bunch of numbers and
* won't be flushed on main path - because WAL itself also contains nonces, if we only flush
* it before memstore flush, for a given nonce we will either see it in the WAL (if it was
* never flushed to disk, it will be part of recovery), or we'll see it as part of the nonce
* log (or both occasionally, which doesn't matter). Nonce log file can be deleted after the
* latest nonce in it expired. It can also be recovered during move.
*/
private final ServerNonceManager nonceManager;
private UserProvider userProvider;
/**
* Starts a HRegionServer at the default location
*
* @param conf
* @throws IOException
* @throws InterruptedException
*/
public HRegionServer(Configuration conf)
throws IOException, InterruptedException {
this.fsOk = true;
this.conf = conf;
this.isOnline = false;
checkCodecs(this.conf);
this.userProvider = UserProvider.instantiate(conf);
Superusers.initialize(conf);
FSUtils.setupShortCircuitRead(this.conf);
// Config'ed params
this.numRetries = this.conf.getInt(HConstants.HBASE_CLIENT_RETRIES_NUMBER,
HConstants.DEFAULT_HBASE_CLIENT_RETRIES_NUMBER);
this.threadWakeFrequency = conf.getInt(HConstants.THREAD_WAKE_FREQUENCY, 10 * 1000);
this.msgInterval = conf.getInt("hbase.regionserver.msginterval", 3 * 1000);
this.sleeper = new Sleeper(this.msgInterval, this);
boolean isNoncesEnabled = conf.getBoolean(HConstants.HBASE_RS_NONCES_ENABLED, true);
this.nonceManager = isNoncesEnabled ? new ServerNonceManager(this.conf) : null;
this.maxScannerResultSize = conf.getLong(
HConstants.HBASE_SERVER_SCANNER_MAX_RESULT_SIZE_KEY,
HConstants.DEFAULT_HBASE_SERVER_SCANNER_MAX_RESULT_SIZE);
this.numRegionsToReport = conf.getInt(
"hbase.regionserver.numregionstoreport", 10);
this.rpcTimeout = conf.getInt(
HConstants.HBASE_RPC_SHORTOPERATION_TIMEOUT_KEY,
HConstants.DEFAULT_HBASE_RPC_SHORTOPERATION_TIMEOUT);
this.abortRequested = false;
this.stopped = false;
this.scannerLeaseTimeoutPeriod = HBaseConfiguration.getInt(conf,
HConstants.HBASE_CLIENT_SCANNER_TIMEOUT_PERIOD,
HConstants.HBASE_REGIONSERVER_LEASE_PERIOD_KEY,
HConstants.DEFAULT_HBASE_CLIENT_SCANNER_TIMEOUT_PERIOD);
// Server to handle client requests.
String hostname = getHostname(conf);
int port = conf.getInt(HConstants.REGIONSERVER_PORT,
HConstants.DEFAULT_REGIONSERVER_PORT);
// Creation of a HSA will force a resolve.
InetSocketAddress initialIsa = new InetSocketAddress(hostname, port);
if (initialIsa.getAddress() == null) {
throw new IllegalArgumentException("Failed resolve of " + initialIsa);
}
this.rand = new Random(initialIsa.hashCode());
String name = "regionserver/" + initialIsa.toString();
// Set how many times to retry talking to another server over HConnection.
HConnectionManager.setServerSideHConnectionRetries(this.conf, name, LOG);
this.priority = new AnnotationReadingPriorityFunction(this);
RpcSchedulerFactory rpcSchedulerFactory;
try {
Class rpcSchedulerFactoryClass = conf.getClass(
REGION_SERVER_RPC_SCHEDULER_FACTORY_CLASS,
SimpleRpcSchedulerFactory.class);
rpcSchedulerFactory = ((RpcSchedulerFactory) rpcSchedulerFactoryClass.newInstance());
} catch (InstantiationException e) {
throw new IllegalArgumentException(e);
} catch (IllegalAccessException e) {
throw new IllegalArgumentException(e);
}
this.rpcServer = new RpcServer(this, name, getServices(),
/*HBaseRPCErrorHandler.class, OnlineRegions.class},*/
initialIsa, // BindAddress is IP we got for this server.
conf,
rpcSchedulerFactory.create(conf, this));
// Set our address.
this.isa = this.rpcServer.getListenerAddress();
this.rpcServer.setErrorHandler(this);
this.startcode = System.currentTimeMillis();
serverName = ServerName.valueOf(isa.getHostName(), isa.getPort(), startcode);
useZKForAssignment = ConfigUtil.useZKForAssignment(conf);
// login the zookeeper client principal (if using security)
ZKUtil.loginClient(this.conf, HConstants.ZK_CLIENT_KEYTAB_FILE,
HConstants.ZK_CLIENT_KERBEROS_PRINCIPAL, this.isa.getHostName());
// login the server principal (if using secure Hadoop)
userProvider.login("hbase.regionserver.keytab.file",
"hbase.regionserver.kerberos.principal", this.isa.getHostName());
regionServerAccounting = new RegionServerAccounting();
cacheConfig = new CacheConfig(conf);
uncaughtExceptionHandler = new UncaughtExceptionHandler() {
@Override
public void uncaughtException(Thread t, Throwable e) {
abort("Uncaught exception in service thread " + t.getName(), e);
}
};
this.rsInfo = RegionServerInfo.newBuilder();
// Put up the webui. Webui may come up on port other than configured if
// that port is occupied. Adjust serverInfo if this is the case.
this.rsInfo.setInfoPort(putUpWebUI());
}
public static String getHostname(Configuration conf) throws UnknownHostException {
return conf.get("hbase.regionserver.ipc.address",
Strings.domainNamePointerToHostName(DNS.getDefaultHost(
conf.get("hbase.regionserver.dns.interface", "default"),
conf.get("hbase.regionserver.dns.nameserver", "default"))));
}
@Override
public boolean registerService(Service instance) {
/*
* No stacking of instances is allowed for a single service name
*/
Descriptors.ServiceDescriptor serviceDesc = instance.getDescriptorForType();
if (coprocessorServiceHandlers.containsKey(serviceDesc.getFullName())) {
LOG.error("Coprocessor service " + serviceDesc.getFullName()
+ " already registered, rejecting request from " + instance);
return false;
}
coprocessorServiceHandlers.put(serviceDesc.getFullName(), instance);
if (LOG.isDebugEnabled()) {
LOG.debug("Registered regionserver coprocessor service: service=" + serviceDesc.getFullName());
}
return true;
}
/**
* @return list of blocking services and their security info classes that this server supports
*/
private List getServices() {
List bssi = new ArrayList(2);
bssi.add(new BlockingServiceAndInterface(
ClientProtos.ClientService.newReflectiveBlockingService(this),
ClientProtos.ClientService.BlockingInterface.class));
bssi.add(new BlockingServiceAndInterface(
AdminProtos.AdminService.newReflectiveBlockingService(this),
AdminProtos.AdminService.BlockingInterface.class));
return bssi;
}
/**
* Run test on configured codecs to make sure supporting libs are in place.
* @param c
* @throws IOException
*/
private static void checkCodecs(final Configuration c) throws IOException {
// check to see if the codec list is available:
String [] codecs = c.getStrings("hbase.regionserver.codecs", (String[])null);
if (codecs == null) return;
for (String codec : codecs) {
if (!CompressionTest.testCompression(codec)) {
throw new IOException("Compression codec " + codec +
" not supported, aborting RS construction");
}
}
}
String getClusterId() {
return this.clusterId;
}
@Override
public int getPriority(RequestHeader header, Message param) {
return priority.getPriority(header, param);
}
@Retention(RetentionPolicy.RUNTIME)
protected @interface QosPriority {
int priority() default 0;
}
PriorityFunction getPriority() {
return priority;
}
RegionScanner getScanner(long scannerId) {
String scannerIdString = Long.toString(scannerId);
RegionScannerHolder scannerHolder = scanners.get(scannerIdString);
if (scannerHolder != null) {
return scannerHolder.s;
}
return null;
}
/**
* All initialization needed before we go register with Master.
*
* @throws IOException
* @throws InterruptedException
*/
private void preRegistrationInitialization(){
try {
initializeZooKeeper();
initializeThreads();
} catch (Throwable t) {
// Call stop if error or process will stick around for ever since server
// puts up non-daemon threads.
this.rpcServer.stop();
abort("Initialization of RS failed. Hence aborting RS.", t);
}
}
/**
* Bring up connection to zk ensemble and then wait until a master for this
* cluster and then after that, wait until cluster 'up' flag has been set.
* This is the order in which master does things.
* Finally put up a catalog tracker.
* @throws IOException
* @throws InterruptedException
*/
private void initializeZooKeeper() throws IOException, InterruptedException {
// Open connection to zookeeper and set primary watcher
this.zooKeeper = new ZooKeeperWatcher(conf, REGIONSERVER + ":" +
this.isa.getPort(), this);
// Create the master address tracker, register with zk, and start it. Then
// block until a master is available. No point in starting up if no master
// running.
this.masterAddressTracker = new MasterAddressTracker(this.zooKeeper, this);
this.masterAddressTracker.start();
blockAndCheckIfStopped(this.masterAddressTracker);
// Wait on cluster being up. Master will set this flag up in zookeeper
// when ready.
this.clusterStatusTracker = new ClusterStatusTracker(this.zooKeeper, this);
this.clusterStatusTracker.start();
blockAndCheckIfStopped(this.clusterStatusTracker);
// Create the catalog tracker and start it;
this.catalogTracker = new CatalogTracker(this.zooKeeper, this.conf, this);
catalogTracker.start();
// Retrieve clusterId
// Since cluster status is now up
// ID should have already been set by HMaster
try {
clusterId = ZKClusterId.readClusterIdZNode(this.zooKeeper);
if (clusterId == null) {
this.abort("Cluster ID has not been set");
}
LOG.info("ClusterId : "+clusterId);
} catch (KeeperException e) {
this.abort("Failed to retrieve Cluster ID",e);
}
// watch for snapshots and other procedures
try {
rspmHost = new RegionServerProcedureManagerHost();
rspmHost.loadProcedures(conf);
rspmHost.initialize(this);
} catch (KeeperException e) {
this.abort("Failed to reach zk cluster when creating procedure handler.", e);
}
this.tableLockManager = TableLockManager.createTableLockManager(conf, zooKeeper,
ServerName.valueOf(isa.getHostName(), isa.getPort(), startcode));
// register watcher for recovering regions
this.recoveringRegionWatcher = new RecoveringRegionWatcher(this.zooKeeper, this);
}
/**
* Utilty method to wait indefinitely on a znode availability while checking
* if the region server is shut down
* @param tracker znode tracker to use
* @throws IOException any IO exception, plus if the RS is stopped
* @throws InterruptedException
*/
private void blockAndCheckIfStopped(ZooKeeperNodeTracker tracker)
throws IOException, InterruptedException {
while (tracker.blockUntilAvailable(this.msgInterval, false) == null) {
if (this.stopped) {
throw new IOException("Received the shutdown message while waiting.");
}
}
}
/**
* @return False if cluster shutdown in progress
*/
private boolean isClusterUp() {
return this.clusterStatusTracker.isClusterUp();
}
private void initializeThreads() throws IOException {
// Cache flushing thread.
this.cacheFlusher = new MemStoreFlusher(conf, this);
// Compaction thread
this.compactSplitThread = new CompactSplitThread(this);
// Background thread to check for compactions; needed if region has not gotten updates
// in a while. It will take care of not checking too frequently on store-by-store basis.
this.compactionChecker = new CompactionChecker(this, this.threadWakeFrequency, this);
this.periodicFlusher = new PeriodicMemstoreFlusher(this.threadWakeFrequency, this);
// Health checker thread.
int sleepTime = this.conf.getInt(HConstants.HEALTH_CHORE_WAKE_FREQ,
HConstants.DEFAULT_THREAD_WAKE_FREQUENCY);
if (isHealthCheckerConfigured()) {
healthCheckChore = new HealthCheckChore(sleepTime, this, getConfiguration());
}
this.leases = new Leases(this.threadWakeFrequency);
// Create the thread to clean the moved regions list
movedRegionsCleaner = MovedRegionsCleaner.createAndStart(this);
if (this.nonceManager != null) {
// Create the chore that cleans up nonces.
nonceManagerChore = this.nonceManager.createCleanupChore(this);
}
// Setup RPC client for master communication
// TODO: no single connection managed anywhere, so no central metrics object to obtain.
rpcClient = new RpcClient(conf, clusterId, new InetSocketAddress(
this.isa.getAddress(), 0), null);
this.pauseMonitor = new JvmPauseMonitor(conf);
pauseMonitor.start();
}
/**
* The HRegionServer sticks in this loop until closed.
*/
@Override
public void run() {
try {
// Do pre-registration initializations; zookeeper, lease threads, etc.
preRegistrationInitialization();
} catch (Throwable e) {
abort("Fatal exception during initialization", e);
}
try {
// Try and register with the Master; tell it we are here. Break if
// server is stopped or the clusterup flag is down or hdfs went wacky.
while (keepLooping()) {
RegionServerStartupResponse w = reportForDuty();
if (w == null) {
LOG.warn("reportForDuty failed; sleeping and then retrying.");
this.sleeper.sleep();
} else {
handleReportForDutyResponse(w);
break;
}
}
// Initialize the RegionServerCoprocessorHost now that our ephemeral
// node was created by reportForDuty, in case any coprocessors want
// to use ZooKeeper
this.rsHost = new RegionServerCoprocessorHost(this, this.conf);
if (!this.stopped && isHealthy()){
// start the snapshot handler and other procedure handlers,
// since the server is ready to run
rspmHost.start();
}
// We registered with the Master. Go into run mode.
long lastMsg = 0;
long oldRequestCount = -1;
// The main run loop.
while (!this.stopped && isHealthy()) {
if (!isClusterUp()) {
if (isOnlineRegionsEmpty()) {
stop("Exiting; cluster shutdown set and not carrying any regions");
} else if (!this.stopping) {
this.stopping = true;
LOG.info("Closing user regions");
closeUserRegions(this.abortRequested);
} else if (this.stopping) {
boolean allUserRegionsOffline = areAllUserRegionsOffline();
if (allUserRegionsOffline) {
// Set stopped if no more write requests tp meta tables
// since last time we went around the loop. Any open
// meta regions will be closed on our way out.
if (oldRequestCount == getWriteRequestCount()) {
stop("Stopped; only catalog regions remaining online");
break;
}
oldRequestCount = getWriteRequestCount();
} else {
// Make sure all regions have been closed -- some regions may
// have not got it because we were splitting at the time of
// the call to closeUserRegions.
closeUserRegions(this.abortRequested);
}
LOG.debug("Waiting on " + getOnlineRegionsAsPrintableString());
}
}
long now = System.currentTimeMillis();
if ((now - lastMsg) >= msgInterval) {
tryRegionServerReport(lastMsg, now);
lastMsg = System.currentTimeMillis();
}
if (!this.stopped) this.sleeper.sleep();
} // for
} catch (Throwable t) {
if (!checkOOME(t)) {
String prefix = t instanceof YouAreDeadException? "": "Unhandled: ";
abort(prefix + t.getMessage(), t);
}
}
// Run shutdown.
if (mxBean != null) {
MBeanUtil.unregisterMBean(mxBean);
mxBean = null;
}
if (this.leases != null) this.leases.closeAfterLeasesExpire();
this.rpcServer.stop();
if (this.splitLogWorker != null) {
splitLogWorker.stop();
}
if (this.infoServer != null) {
LOG.info("Stopping infoServer");
try {
this.infoServer.stop();
} catch (Exception e) {
e.printStackTrace();
}
}
// Send cache a shutdown.
if (cacheConfig.isBlockCacheEnabled()) {
cacheConfig.getBlockCache().shutdown();
}
if (movedRegionsCleaner != null) {
movedRegionsCleaner.stop("Region Server stopping");
}
// Send interrupts to wake up threads if sleeping so they notice shutdown.
// TODO: Should we check they are alive? If OOME could have exited already
if (this.hMemManager != null) this.hMemManager.stop();
if (this.cacheFlusher != null) this.cacheFlusher.interruptIfNecessary();
if (this.compactSplitThread != null) this.compactSplitThread.interruptIfNecessary();
if (this.hlogRoller != null) this.hlogRoller.interruptIfNecessary();
if (this.metaHLogRoller != null) this.metaHLogRoller.interruptIfNecessary();
if (this.compactionChecker != null)
this.compactionChecker.interrupt();
if (this.healthCheckChore != null) {
this.healthCheckChore.interrupt();
}
if (this.nonceManagerChore != null) {
this.nonceManagerChore.interrupt();
}
// Stop the snapshot and other procedure handlers, forcefully killing all running tasks
if (rspmHost != null) {
rspmHost.stop(this.abortRequested || this.killed);
}
if (this.killed) {
// Just skip out w/o closing regions. Used when testing.
} else if (abortRequested) {
if (this.fsOk) {
closeUserRegions(abortRequested); // Don't leave any open file handles
}
LOG.info("aborting server " + this.serverNameFromMasterPOV);
} else {
closeUserRegions(abortRequested);
closeAllScanners();
LOG.info("stopping server " + this.serverNameFromMasterPOV);
}
// Interrupt catalog tracker here in case any regions being opened out in
// handlers are stuck waiting on meta.
if (this.catalogTracker != null) this.catalogTracker.stop();
// Closing the compactSplit thread before closing meta regions
if (!this.killed && containsMetaTableRegions()) {
if (!abortRequested || this.fsOk) {
if (this.compactSplitThread != null) {
this.compactSplitThread.join();
this.compactSplitThread = null;
}
closeMetaTableRegions(abortRequested);
}
}
if (!this.killed && this.fsOk) {
waitOnAllRegionsToClose(abortRequested);
LOG.info("stopping server " + this.serverNameFromMasterPOV +
"; all regions closed.");
}
//fsOk flag may be changed when closing regions throws exception.
if (this.fsOk) {
closeWAL(!abortRequested);
}
// Make sure the proxy is down.
if (this.rssStub != null) {
this.rssStub = null;
}
if (this.rpcClient != null) {
this.rpcClient.stop();
}
if (this.leases != null) {
this.leases.close();
}
if (this.pauseMonitor != null) {
this.pauseMonitor.stop();
}
if (!killed) {
join();
}
try {
deleteMyEphemeralNode();
} catch (KeeperException e) {
LOG.warn("Failed deleting my ephemeral node", e);
}
// We may have failed to delete the znode at the previous step, but
// we delete the file anyway: a second attempt to delete the znode is likely to fail again.
ZNodeClearer.deleteMyEphemeralNodeOnDisk();
if (this.zooKeeper != null) {
this.zooKeeper.close();
}
LOG.info("stopping server " + this.serverNameFromMasterPOV +
"; zookeeper connection closed.");
LOG.info(Thread.currentThread().getName() + " exiting");
}
private boolean containsMetaTableRegions() {
return onlineRegions.containsKey(HRegionInfo.FIRST_META_REGIONINFO.getEncodedName());
}
private boolean areAllUserRegionsOffline() {
if (getNumberOfOnlineRegions() > 2) return false;
boolean allUserRegionsOffline = true;
for (Map.Entry e: this.onlineRegions.entrySet()) {
if (!e.getValue().getRegionInfo().isMetaTable()) {
allUserRegionsOffline = false;
break;
}
}
return allUserRegionsOffline;
}
/**
* @return Current write count for all online regions.
*/
private long getWriteRequestCount() {
int writeCount = 0;
for (Map.Entry e: this.onlineRegions.entrySet()) {
writeCount += e.getValue().getWriteRequestsCount();
}
return writeCount;
}
@VisibleForTesting
protected void tryRegionServerReport(long reportStartTime, long reportEndTime)
throws IOException {
RegionServerStatusService.BlockingInterface rss = rssStub;
if (rss == null) {
// the current server could be stopping.
return;
}
ClusterStatusProtos.ServerLoad sl = buildServerLoad(reportStartTime, reportEndTime);
try {
RegionServerReportRequest.Builder request = RegionServerReportRequest.newBuilder();
ServerName sn = ServerName.parseVersionedServerName(
this.serverNameFromMasterPOV.getVersionedBytes());
request.setServer(ProtobufUtil.toServerName(sn));
request.setLoad(sl);
rss.regionServerReport(null, request.build());
} catch (ServiceException se) {
IOException ioe = ProtobufUtil.getRemoteException(se);
if (ioe instanceof YouAreDeadException) {
// This will be caught and handled as a fatal error in run()
throw ioe;
}
if (rssStub == rss) {
rssStub = null;
}
// Couldn't connect to the master, get location from zk and reconnect
// Method blocks until new master is found or we are stopped
createRegionServerStatusStub();
}
}
ClusterStatusProtos.ServerLoad buildServerLoad(long reportStartTime, long reportEndTime)
throws IOException {
// We're getting the MetricsRegionServerWrapper here because the wrapper computes requests
// per second, and other metrics As long as metrics are part of ServerLoad it's best to use
// the wrapper to compute those numbers in one place.
// In the long term most of these should be moved off of ServerLoad and the heart beat.
// Instead they should be stored in an HBase table so that external visibility into HBase is
// improved; Additionally the load balancer will be able to take advantage of a more complete
// history.
MetricsRegionServerWrapper regionServerWrapper = this.metricsRegionServer.getRegionServerWrapper();
Collection regions = getOnlineRegionsLocalContext();
MemoryUsage memory =
ManagementFactory.getMemoryMXBean().getHeapMemoryUsage();
ClusterStatusProtos.ServerLoad.Builder serverLoad =
ClusterStatusProtos.ServerLoad.newBuilder();
serverLoad.setNumberOfRequests((int) regionServerWrapper.getRequestsPerSecond());
serverLoad.setTotalNumberOfRequests((int) regionServerWrapper.getTotalRequestCount());
serverLoad.setUsedHeapMB((int)(memory.getUsed() / 1024 / 1024));
serverLoad.setMaxHeapMB((int) (memory.getMax() / 1024 / 1024));
Set coprocessors = getWAL(null).getCoprocessorHost().getCoprocessors();
Builder coprocessorBuilder = Coprocessor.newBuilder();
for (String coprocessor : coprocessors) {
serverLoad.addCoprocessors(coprocessorBuilder.setName(coprocessor).build());
}
RegionLoad.Builder regionLoadBldr = RegionLoad.newBuilder();
RegionSpecifier.Builder regionSpecifier = RegionSpecifier.newBuilder();
for (HRegion region : regions) {
if (region.getCoprocessorHost() != null) {
Set regionCoprocessors = region.getCoprocessorHost().getCoprocessors();
Iterator iterator = regionCoprocessors.iterator();
while (iterator.hasNext()) {
serverLoad.addCoprocessors(coprocessorBuilder.setName(iterator.next()).build());
}
}
serverLoad.addRegionLoads(createRegionLoad(region, regionLoadBldr, regionSpecifier));
for (String coprocessor : getWAL(region.getRegionInfo()).getCoprocessorHost()
.getCoprocessors()) {
serverLoad.addCoprocessors(coprocessorBuilder.setName(coprocessor).build());
}
}
serverLoad.setReportStartTime(reportStartTime);
serverLoad.setReportEndTime(reportEndTime);
if (this.infoServer != null) {
serverLoad.setInfoServerPort(this.infoServer.getPort());
} else {
serverLoad.setInfoServerPort(-1);
}
// for the replicationLoad purpose. Only need to get from one service
// either source or sink will get the same info
ReplicationSourceService rsources = getReplicationSourceService();
if (rsources != null) {
// always refresh first to get the latest value
ReplicationLoad rLoad = rsources.refreshAndGetReplicationLoad();
if (rLoad != null) {
serverLoad.setReplLoadSink(rLoad.getReplicationLoadSink());
for (ClusterStatusProtos.ReplicationLoadSource rLS : rLoad.getReplicationLoadSourceList()) {
serverLoad.addReplLoadSource(rLS);
}
}
}
return serverLoad.build();
}
String getOnlineRegionsAsPrintableString() {
StringBuilder sb = new StringBuilder();
for (HRegion r: this.onlineRegions.values()) {
if (sb.length() > 0) sb.append(", ");
sb.append(r.getRegionInfo().getEncodedName());
}
return sb.toString();
}
/**
* Wait on regions close.
*/
private void waitOnAllRegionsToClose(final boolean abort) {
// Wait till all regions are closed before going out.
int lastCount = -1;
long previousLogTime = 0;
Set closedRegions = new HashSet();
while (!isOnlineRegionsEmpty()) {
int count = getNumberOfOnlineRegions();
// Only print a message if the count of regions has changed.
if (count != lastCount) {
// Log every second at most
if (System.currentTimeMillis() > (previousLogTime + 1000)) {
previousLogTime = System.currentTimeMillis();
lastCount = count;
LOG.info("Waiting on " + count + " regions to close");
// Only print out regions still closing if a small number else will
// swamp the log.
if (count < 10 && LOG.isDebugEnabled()) {
LOG.debug(this.onlineRegions);
}
}
}
// Ensure all user regions have been sent a close. Use this to
// protect against the case where an open comes in after we start the
// iterator of onlineRegions to close all user regions.
for (Map.Entry e : this.onlineRegions.entrySet()) {
HRegionInfo hri = e.getValue().getRegionInfo();
if (!this.regionsInTransitionInRS.containsKey(hri.getEncodedNameAsBytes())
&& !closedRegions.contains(hri.getEncodedName())) {
closedRegions.add(hri.getEncodedName());
// Don't update zk with this close transition; pass false.
closeRegionIgnoreErrors(hri, abort);
}
}
// No regions in RIT, we could stop waiting now.
if (this.regionsInTransitionInRS.isEmpty()) {
if (!isOnlineRegionsEmpty()) {
LOG.info("We were exiting though online regions are not empty," +
" because some regions failed closing");
}
break;
}
Threads.sleep(200);
}
}
private void closeWAL(final boolean delete) {
if (this.hlogForMeta != null) {
// All hlogs (meta and non-meta) are in the same directory. Don't call
// closeAndDelete here since that would delete all hlogs not just the
// meta ones. We will just 'close' the hlog for meta here, and leave
// the directory cleanup to the follow-on closeAndDelete call.
try {
this.hlogForMeta.close();
} catch (Throwable e) {
LOG.error("Metalog close and delete failed", RemoteExceptionHandler.checkThrowable(e));
}
}
if (this.hlog != null) {
try {
if (delete) {
hlog.closeAndDelete();
} else {
hlog.close();
}
} catch (Throwable e) {
LOG.error("Close and delete failed", RemoteExceptionHandler.checkThrowable(e));
}
}
}
private void closeAllScanners() {
// Close any outstanding scanners. Means they'll get an UnknownScanner
// exception next time they come in.
for (Map.Entry e : this.scanners.entrySet()) {
try {
e.getValue().s.close();
} catch (IOException ioe) {
LOG.warn("Closing scanner " + e.getKey(), ioe);
}
}
}
/*
* Run init. Sets up hlog and starts up all server threads.
*
* @param c Extra configuration.
*/
protected void handleReportForDutyResponse(final RegionServerStartupResponse c)
throws IOException {
try {
for (NameStringPair e : c.getMapEntriesList()) {
String key = e.getName();
// The hostname the master sees us as.
if (key.equals(HConstants.KEY_FOR_HOSTNAME_SEEN_BY_MASTER)) {
String hostnameFromMasterPOV = e.getValue();
this.serverNameFromMasterPOV = ServerName.valueOf(hostnameFromMasterPOV,
this.isa.getPort(), this.startcode);
if (!hostnameFromMasterPOV.equals(this.isa.getHostName())) {
LOG.info("Master passed us a different hostname to use; was=" +
this.isa.getHostName() + ", but now=" + hostnameFromMasterPOV);
}
continue;
}
String value = e.getValue();
if (LOG.isDebugEnabled()) {
LOG.debug("Config from master: " + key + "=" + value);
}
this.conf.set(key, value);
}
// hack! Maps DFSClient => RegionServer for logs. HDFS made this
// config param for task trackers, but we can piggyback off of it.
if (this.conf.get("mapred.task.id") == null) {
this.conf.set("mapred.task.id", "hb_rs_" +
this.serverNameFromMasterPOV.toString());
}
// Set our ephemeral znode up in zookeeper now we have a name.
createMyEphemeralNode();
// Save it in a file, this will allow to see if we crash
ZNodeClearer.writeMyEphemeralNodeOnDisk(getMyEphemeralNodePath());
// Master sent us hbase.rootdir to use. Should be fully qualified
// path with file system specification included. Set 'fs.defaultFS'
// to match the filesystem on hbase.rootdir else underlying hadoop hdfs
// accessors will be going against wrong filesystem (unless all is set
// to defaults).
FSUtils.setFsDefault(this.conf, FSUtils.getRootDir(this.conf));
// Get fs instance used by this RS. Do we use checksum verification in the hbase? If hbase
// checksum verification enabled, then automatically switch off hdfs checksum verification.
boolean useHBaseChecksum = conf.getBoolean(HConstants.HBASE_CHECKSUM_VERIFICATION, true);
this.fs = new HFileSystem(this.conf, useHBaseChecksum);
this.rootDir = FSUtils.getRootDir(this.conf);
this.tableDescriptors = new FSTableDescriptors(this.conf, this.fs, this.rootDir, true, false);
this.hlog = setupWALAndReplication();
// Init in here rather than in constructor after thread name has been set
this.metricsRegionServer = new MetricsRegionServer(new MetricsRegionServerWrapperImpl(this));
spanReceiverHost = SpanReceiverHost.getInstance(getConfiguration());
startServiceThreads();
startHeapMemoryManager();
LOG.info("Serving as " + this.serverNameFromMasterPOV +
", RpcServer on " + this.isa +
", sessionid=0x" +
Long.toHexString(this.zooKeeper.getRecoverableZooKeeper().getSessionId()));
isOnline = true;
} catch (Throwable e) {
this.isOnline = false;
stop("Failed initialization");
throw convertThrowableToIOE(cleanup(e, "Failed init"),
"Region server startup failed");
} finally {
sleeper.skipSleepCycle();
}
}
private void startHeapMemoryManager() {
this.hMemManager = HeapMemoryManager.create(this);
if (this.hMemManager != null) {
this.hMemManager.start();
}
}
private void createMyEphemeralNode() throws KeeperException, IOException {
byte[] data = ProtobufUtil.prependPBMagic(rsInfo.build().toByteArray());
ZKUtil.createEphemeralNodeAndWatch(this.zooKeeper,
getMyEphemeralNodePath(), data);
}
private void deleteMyEphemeralNode() throws KeeperException {
ZKUtil.deleteNode(this.zooKeeper, getMyEphemeralNodePath());
}
@Override
public RegionServerAccounting getRegionServerAccounting() {
return regionServerAccounting;
}
@Override
public TableLockManager getTableLockManager() {
return tableLockManager;
}
/*
* @param r Region to get RegionLoad for.
* @param regionLoadBldr the RegionLoad.Builder, can be null
* @param regionSpecifier the RegionSpecifier.Builder, can be null
* @return RegionLoad instance.
*
* @throws IOException
*/
private RegionLoad createRegionLoad(final HRegion r, RegionLoad.Builder regionLoadBldr,
RegionSpecifier.Builder regionSpecifier) {
byte[] name = r.getRegionName();
int stores = 0;
int storefiles = 0;
int storeUncompressedSizeMB = 0;
int storefileSizeMB = 0;
int memstoreSizeMB = (int) (r.memstoreSize.get() / 1024 / 1024);
int storefileIndexSizeMB = 0;
int rootIndexSizeKB = 0;
int totalStaticIndexSizeKB = 0;
int totalStaticBloomSizeKB = 0;
long totalCompactingKVs = 0;
long currentCompactedKVs = 0;
synchronized (r.stores) {
stores += r.stores.size();
for (Store store : r.stores.values()) {
storefiles += store.getStorefilesCount();
storeUncompressedSizeMB += (int) (store.getStoreSizeUncompressed()
/ 1024 / 1024);
storefileSizeMB += (int) (store.getStorefilesSize() / 1024 / 1024);
storefileIndexSizeMB += (int) (store.getStorefilesIndexSize() / 1024 / 1024);
CompactionProgress progress = store.getCompactionProgress();
if (progress != null) {
totalCompactingKVs += progress.totalCompactingKVs;
currentCompactedKVs += progress.currentCompactedKVs;
}
rootIndexSizeKB +=
(int) (store.getStorefilesIndexSize() / 1024);
totalStaticIndexSizeKB +=
(int) (store.getTotalStaticIndexSize() / 1024);
totalStaticBloomSizeKB +=
(int) (store.getTotalStaticBloomSize() / 1024);
}
}
float dataLocality =
r.getHDFSBlocksDistribution().getBlockLocalityIndex(serverName.getHostname());
if (regionLoadBldr == null) {
regionLoadBldr = RegionLoad.newBuilder();
}
if (regionSpecifier == null) {
regionSpecifier = RegionSpecifier.newBuilder();
}
regionSpecifier.setType(RegionSpecifierType.REGION_NAME);
regionSpecifier.setValue(ByteStringer.wrap(name));
regionLoadBldr.setRegionSpecifier(regionSpecifier.build())
.setStores(stores)
.setStorefiles(storefiles)
.setStoreUncompressedSizeMB(storeUncompressedSizeMB)
.setStorefileSizeMB(storefileSizeMB)
.setMemstoreSizeMB(memstoreSizeMB)
.setStorefileIndexSizeMB(storefileIndexSizeMB)
.setRootIndexSizeKB(rootIndexSizeKB)
.setTotalStaticIndexSizeKB(totalStaticIndexSizeKB)
.setTotalStaticBloomSizeKB(totalStaticBloomSizeKB)
.setReadRequestsCount(r.readRequestsCount.get())
.setWriteRequestsCount(r.writeRequestsCount.get())
.setTotalCompactingKVs(totalCompactingKVs)
.setCurrentCompactedKVs(currentCompactedKVs)
.setCompleteSequenceId(r.completeSequenceId)
.setDataLocality(dataLocality);
return regionLoadBldr.build();
}
/**
* @param encodedRegionName
* @return An instance of RegionLoad.
*/
public RegionLoad createRegionLoad(final String encodedRegionName) {
HRegion r = null;
r = this.onlineRegions.get(encodedRegionName);
return r != null ? createRegionLoad(r, null, null) : null;
}
/*
* Inner class that runs on a long period checking if regions need compaction.
*/
private static class CompactionChecker extends Chore {
private final HRegionServer instance;
private final int majorCompactPriority;
private final static int DEFAULT_PRIORITY = Integer.MAX_VALUE;
private long iteration = 0;
CompactionChecker(final HRegionServer h, final int sleepTime,
final Stoppable stopper) {
super("CompactionChecker", sleepTime, h);
this.instance = h;
LOG.info(this.getName() + " runs every " + StringUtils.formatTime(sleepTime));
/* MajorCompactPriority is configurable.
* If not set, the compaction will use default priority.
*/
this.majorCompactPriority = this.instance.conf.
getInt("hbase.regionserver.compactionChecker.majorCompactPriority",
DEFAULT_PRIORITY);
}
@Override
protected void chore() {
for (HRegion r : this.instance.onlineRegions.values()) {
if (r == null)
continue;
for (Store s : r.getStores().values()) {
try {
long multiplier = s.getCompactionCheckMultiplier();
assert multiplier > 0;
if (iteration % multiplier != 0) continue;
if (s.needsCompaction()) {
// Queue a compaction. Will recognize if major is needed.
this.instance.compactSplitThread.requestSystemCompaction(r, s, getName()
+ " requests compaction");
} else if (s.isMajorCompaction()) {
if (majorCompactPriority == DEFAULT_PRIORITY
|| majorCompactPriority > r.getCompactPriority()) {
this.instance.compactSplitThread.requestCompaction(r, s, getName()
+ " requests major compaction; use default priority", null);
} else {
this.instance.compactSplitThread.requestCompaction(r, s, getName()
+ " requests major compaction; use configured priority",
this.majorCompactPriority, null, null);
}
}
} catch (IOException e) {
LOG.warn("Failed major compaction check on " + r, e);
}
}
}
iteration = (iteration == Long.MAX_VALUE) ? 0 : (iteration + 1);
}
}
class PeriodicMemstoreFlusher extends Chore {
final HRegionServer server;
final static int RANGE_OF_DELAY = 20000; //millisec
final static int MIN_DELAY_TIME = 3000; //millisec
public PeriodicMemstoreFlusher(int cacheFlushInterval, final HRegionServer server) {
super(server.getServerName() + "-MemstoreFlusherChore", cacheFlushInterval, server);
this.server = server;
}
@Override
protected void chore() {
for (HRegion r : this.server.onlineRegions.values()) {
if (r == null)
continue;
if (r.shouldFlush()) {
FlushRequester requester = server.getFlushRequester();
if (requester != null) {
long randomDelay = rand.nextInt(RANGE_OF_DELAY) + MIN_DELAY_TIME;
LOG.info(getName() + " requesting flush for region " + r.getRegionNameAsString() +
" after a delay of " + randomDelay);
//Throttle the flushes by putting a delay. If we don't throttle, and there
//is a balanced write-load on the regions in a table, we might end up
//overwhelming the filesystem with too many flushes at once.
requester.requestDelayedFlush(r, randomDelay);
}
}
}
}
}
/**
* Report the status of the server. A server is online once all the startup is
* completed (setting up filesystem, starting service threads, etc.). This
* method is designed mostly to be useful in tests.
*
* @return true if online, false if not.
*/
public boolean isOnline() {
return isOnline;
}
/**
* Setup WAL log and replication if enabled.
* Replication setup is done in here because it wants to be hooked up to WAL.
* @return A WAL instance.
* @throws IOException
*/
private HLog setupWALAndReplication() throws IOException {
final Path oldLogDir = new Path(rootDir, HConstants.HREGION_OLDLOGDIR_NAME);
final String logName
= HLogUtil.getHLogDirectoryName(this.serverNameFromMasterPOV.toString());
Path logdir = new Path(rootDir, logName);
if (LOG.isDebugEnabled()) LOG.debug("logdir=" + logdir);
if (this.fs.exists(logdir)) {
throw new RegionServerRunningException("Region server has already " +
"created directory at " + this.serverNameFromMasterPOV.toString());
}
// Instantiate replication manager if replication enabled. Pass it the
// log directories.
createNewReplicationInstance(conf, this, this.fs, logdir, oldLogDir);
return instantiateHLog(rootDir, logName);
}
private HLog getMetaWAL() throws IOException {
if (this.hlogForMeta != null) return this.hlogForMeta;
final String logName = HLogUtil.getHLogDirectoryName(this.serverNameFromMasterPOV.toString());
Path logdir = new Path(rootDir, logName);
if (LOG.isDebugEnabled()) LOG.debug("logdir=" + logdir);
this.hlogForMeta = HLogFactory.createMetaHLog(this.fs.getBackingFs(), rootDir, logName,
this.conf, getMetaWALActionListeners(), this.serverNameFromMasterPOV.toString());
return this.hlogForMeta;
}
/**
* Called by {@link #setupWALAndReplication()} creating WAL instance.
* @param rootdir
* @param logName
* @return WAL instance.
* @throws IOException
*/
protected HLog instantiateHLog(Path rootdir, String logName) throws IOException {
return HLogFactory.createHLog(this.fs.getBackingFs(), rootdir, logName, this.conf,
getWALActionListeners(), this.serverNameFromMasterPOV.toString());
}
/**
* Called by {@link #instantiateHLog(Path, String)} setting up WAL instance.
* Add any {@link WALActionsListener}s you want inserted before WAL startup.
* @return List of WALActionsListener that will be passed in to
* {@link org.apache.hadoop.hbase.regionserver.wal.FSHLog} on construction.
*/
protected List getWALActionListeners() {
List listeners = new ArrayList();
// Log roller.
this.hlogRoller = new LogRoller(this, this);
listeners.add(this.hlogRoller);
if (this.replicationSourceHandler != null &&
this.replicationSourceHandler.getWALActionsListener() != null) {
// Replication handler is an implementation of WALActionsListener.
listeners.add(this.replicationSourceHandler.getWALActionsListener());
}
return listeners;
}
protected List getMetaWALActionListeners() {
List listeners = new ArrayList();
// Using a tmp log roller to ensure metaLogRoller is alive once it is not
// null
MetaLogRoller tmpLogRoller = new MetaLogRoller(this, this);
String n = Thread.currentThread().getName();
Threads.setDaemonThreadRunning(tmpLogRoller.getThread(),
n + "-MetaLogRoller", uncaughtExceptionHandler);
this.metaHLogRoller = tmpLogRoller;
tmpLogRoller = null;
listeners.add(this.metaHLogRoller);
return listeners;
}
protected LogRoller getLogRoller() {
return hlogRoller;
}
public MetricsRegionServer getMetrics() {
return this.metricsRegionServer;
}
/**
* @return Master address tracker instance.
*/
public MasterAddressTracker getMasterAddressTracker() {
return this.masterAddressTracker;
}
/*
* Start maintenance Threads, Server, Worker and lease checker threads.
* Install an UncaughtExceptionHandler that calls abort of RegionServer if we
* get an unhandled exception. We cannot set the handler on all threads.
* Server's internal Listener thread is off limits. For Server, if an OOME, it
* waits a while then retries. Meantime, a flush or a compaction that tries to
* run should trigger same critical condition and the shutdown will run. On
* its way out, this server will shut down Server. Leases are sort of
* inbetween. It has an internal thread that while it inherits from Chore, it
* keeps its own internal stop mechanism so needs to be stopped by this
* hosting server. Worker logs the exception and exits.
*/
private void startServiceThreads() throws IOException {
String n = Thread.currentThread().getName();
// Start executor services
this.service = new ExecutorService(getServerName().toShortString());
this.service.startExecutorService(ExecutorType.RS_OPEN_REGION,
conf.getInt("hbase.regionserver.executor.openregion.threads", 3));
this.service.startExecutorService(ExecutorType.RS_OPEN_META,
conf.getInt("hbase.regionserver.executor.openmeta.threads", 1));
this.service.startExecutorService(ExecutorType.RS_CLOSE_REGION,
conf.getInt("hbase.regionserver.executor.closeregion.threads", 3));
this.service.startExecutorService(ExecutorType.RS_CLOSE_META,
conf.getInt("hbase.regionserver.executor.closemeta.threads", 1));
if (conf.getBoolean(StoreScanner.STORESCANNER_PARALLEL_SEEK_ENABLE, false)) {
this.service.startExecutorService(ExecutorType.RS_PARALLEL_SEEK,
conf.getInt("hbase.storescanner.parallel.seek.threads", 10));
}
this.service.startExecutorService(ExecutorType.RS_LOG_REPLAY_OPS,
conf.getInt("hbase.regionserver.wal.max.splitters", SplitLogWorker.DEFAULT_MAX_SPLITTERS));
Threads.setDaemonThreadRunning(this.hlogRoller.getThread(), n + ".logRoller",
uncaughtExceptionHandler);
this.cacheFlusher.start(uncaughtExceptionHandler);
Threads.setDaemonThreadRunning(this.compactionChecker.getThread(), n +
".compactionChecker", uncaughtExceptionHandler);
Threads.setDaemonThreadRunning(this.periodicFlusher.getThread(), n +
".periodicFlusher", uncaughtExceptionHandler);
if (this.healthCheckChore != null) {
Threads.setDaemonThreadRunning(this.healthCheckChore.getThread(), n + ".healthChecker",
uncaughtExceptionHandler);
}
if (this.nonceManagerChore != null) {
Threads.setDaemonThreadRunning(this.nonceManagerChore.getThread(), n + ".nonceCleaner",
uncaughtExceptionHandler);
}
// Leases is not a Thread. Internally it runs a daemon thread. If it gets
// an unhandled exception, it will just exit.
Threads.setDaemonThreadRunning(this.leases.getThread(), n + ".leaseChecker",
uncaughtExceptionHandler);
if (this.replicationSourceHandler == this.replicationSinkHandler &&
this.replicationSourceHandler != null) {
this.replicationSourceHandler.startReplicationService();
} else {
if (this.replicationSourceHandler != null) {
this.replicationSourceHandler.startReplicationService();
}
if (this.replicationSinkHandler != null) {
this.replicationSinkHandler.startReplicationService();
}
}
// Start Server. This service is like leases in that it internally runs
// a thread.
this.rpcServer.start();
// Create the log splitting worker and start it
// set a smaller retries to fast fail otherwise splitlogworker could be blocked for
// quite a while inside HConnection layer. The worker won't be available for other
// tasks even after current task is preempted after a split task times out.
Configuration sinkConf = HBaseConfiguration.create(conf);
sinkConf.setInt(HConstants.HBASE_CLIENT_RETRIES_NUMBER,
conf.getInt("hbase.log.replay.retries.number", 8)); // 8 retries take about 23 seconds
sinkConf.setInt(HConstants.HBASE_RPC_TIMEOUT_KEY,
conf.getInt("hbase.log.replay.rpc.timeout", 30000)); // default 30 seconds
sinkConf.setInt("hbase.client.serverside.retries.multiplier", 1);
this.splitLogWorker = new SplitLogWorker(this.zooKeeper, sinkConf, this, this);
splitLogWorker.start();
}
/**
* Puts up the webui.
* @return Returns final port -- maybe different from what we started with.
* @throws IOException
*/
private int putUpWebUI() throws IOException {
int port = this.conf.getInt(HConstants.REGIONSERVER_INFO_PORT, 60030);
// -1 is for disabling info server
if (port < 0) return port;
String addr = this.conf.get("hbase.regionserver.info.bindAddress", "0.0.0.0");
// check if auto port bind enabled
boolean auto = this.conf.getBoolean(HConstants.REGIONSERVER_INFO_PORT_AUTO,
false);
while (true) {
try {
this.infoServer = new InfoServer("regionserver", addr, port, false, this.conf);
this.infoServer.addServlet("status", "/rs-status", RSStatusServlet.class);
this.infoServer.addServlet("dump", "/dump", RSDumpServlet.class);
this.infoServer.setAttribute(REGIONSERVER, this);
this.infoServer.setAttribute(REGIONSERVER_CONF, conf);
this.infoServer.start();
break;
} catch (BindException e) {
if (!auto) {
// auto bind disabled throw BindException
LOG.error("Failed binding http info server to port: " + port);
throw e;
}
// auto bind enabled, try to use another port
LOG.info("Failed binding http info server to port: " + port);
port++;
}
}
return this.infoServer.getPort();
}
/*
* Verify that server is healthy
*/
private boolean isHealthy() {
if (!fsOk) {
// File system problem
return false;
}
// Verify that all threads are alive
if (!(leases.isAlive()
&& cacheFlusher.isAlive() && hlogRoller.isAlive()
&& this.compactionChecker.isAlive()
&& this.periodicFlusher.isAlive())) {
stop("One or more threads are no longer alive -- stop");
return false;
}
if (metaHLogRoller != null && !metaHLogRoller.isAlive()) {
stop("Meta HLog roller thread is no longer alive -- stop");
return false;
}
return true;
}
public HLog getWAL() {
try {
return getWAL(null);
} catch (IOException e) {
LOG.warn("getWAL threw exception " + e);
return null;
}
}
@Override
public HLog getWAL(HRegionInfo regionInfo) throws IOException {
//TODO: at some point this should delegate to the HLogFactory
//currently, we don't care about the region as much as we care about the
//table.. (hence checking the tablename below)
//_ROOT_ and hbase:meta regions have separate WAL.
if (regionInfo != null && regionInfo.isMetaTable()) {
return getMetaWAL();
}
return this.hlog;
}
@Override
public CatalogTracker getCatalogTracker() {
return this.catalogTracker;
}
@Override
public void stop(final String msg) {
if (!this.stopped) {
try {
if (this.rsHost != null) {
this.rsHost.preStop(msg);
}
this.stopped = true;
LOG.info("STOPPED: " + msg);
// Wakes run() if it is sleeping
sleeper.skipSleepCycle();
} catch (IOException exp) {
LOG.warn("The region server did not stop", exp);
}
}
}
public void waitForServerOnline(){
while (!isOnline() && !isStopped()){
sleeper.sleep();
}
}
@Override
public void postOpenDeployTasks(final HRegion r, final CatalogTracker ct)
throws KeeperException, IOException {
postOpenDeployTasks(new PostOpenDeployContext(r, -1), ct);
}
@Override
public void postOpenDeployTasks(final PostOpenDeployContext context, final CatalogTracker ct)
throws KeeperException, IOException {
HRegion r = context.getRegion();
long masterSystemTime = context.getMasterSystemTime();
checkOpen();
LOG.info("Post open deploy tasks for region=" + r.getRegionNameAsString());
// Do checks to see if we need to compact (references or too many files)
for (Store s : r.getStores().values()) {
if (s.hasReferences() || s.needsCompaction()) {
this.compactSplitThread.requestSystemCompaction(r, s, "Opening Region");
}
}
long openSeqNum = r.getOpenSeqNum();
if (openSeqNum == HConstants.NO_SEQNUM) {
// If we opened a region, we should have read some sequence number from it.
LOG.error("No sequence number found when opening " + r.getRegionNameAsString());
openSeqNum = 0;
}
// Update flushed sequence id of a recovering region in ZK
updateRecoveringRegionLastFlushedSequenceId(r);
if (useZKForAssignment) {
if (r.getRegionInfo().isMetaRegion()) {
LOG.info("Updating zk with meta location");
// The state field is for zk less assignment
// For zk assignment, always set it to OPEN
MetaRegionTracker.setMetaLocation(getZooKeeper(), this.serverNameFromMasterPOV, State.OPEN);
} else {
MetaEditor.updateRegionLocation(ct, r.getRegionInfo(), this.serverNameFromMasterPOV,
openSeqNum, masterSystemTime);
}
}
if (!useZKForAssignment
&& !reportRegionStateTransition(new RegionStateTransitionContext(
TransitionCode.OPENED, openSeqNum, masterSystemTime, r.getRegionInfo()))) {
throw new IOException("Failed to report opened region to master: "
+ r.getRegionNameAsString());
}
LOG.info("Finished post open deploy task for " + r.getRegionNameAsString());
}
@Override
public RpcServerInterface getRpcServer() {
return rpcServer;
}
/**
* Cause the server to exit without closing the regions it is serving, the log
* it is using and without notifying the master. Used unit testing and on
* catastrophic events such as HDFS is yanked out from under hbase or we OOME.
*
* @param reason
* the reason we are aborting
* @param cause
* the exception that caused the abort, or null
*/
@Override
public void abort(String reason, Throwable cause) {
String msg = "ABORTING region server " + this + ": " + reason;
if (cause != null) {
LOG.fatal(msg, cause);
} else {
LOG.fatal(msg);
}
this.abortRequested = true;
// HBASE-4014: show list of coprocessors that were loaded to help debug
// regionserver crashes.Note that we're implicitly using
// java.util.HashSet's toString() method to print the coprocessor names.
LOG.fatal("RegionServer abort: loaded coprocessors are: " +
CoprocessorHost.getLoadedCoprocessors());
// Do our best to report our abort to the master, but this may not work
try {
if (cause != null) {
msg += "\nCause:\n" + StringUtils.stringifyException(cause);
}
// Report to the master but only if we have already registered with the master.
if (rssStub != null && this.serverNameFromMasterPOV != null) {
ReportRSFatalErrorRequest.Builder builder =
ReportRSFatalErrorRequest.newBuilder();
ServerName sn =
ServerName.parseVersionedServerName(this.serverNameFromMasterPOV.getVersionedBytes());
builder.setServer(ProtobufUtil.toServerName(sn));
builder.setErrorMessage(msg);
rssStub.reportRSFatalError(null, builder.build());
}
} catch (Throwable t) {
LOG.warn("Unable to report fatal error to master", t);
}
stop(reason);
}
/**
* @see HRegionServer#abort(String, Throwable)
*/
public void abort(String reason) {
abort(reason, null);
}
@Override
public boolean isAborted() {
return this.abortRequested;
}
/*
* Simulate a kill -9 of this server. Exits w/o closing regions or cleaninup
* logs but it does close socket in case want to bring up server on old
* hostname+port immediately.
*/
protected void kill() {
this.killed = true;
abort("Simulated kill");
}
/**
* Wait on all threads to finish. Presumption is that all closes and stops
* have already been called.
*/
protected void join() {
if (this.nonceManagerChore != null) {
Threads.shutdown(this.nonceManagerChore.getThread());
}
if (this.compactionChecker != null) {
Threads.shutdown(this.compactionChecker.getThread());
}
if (this.periodicFlusher != null) {
Threads.shutdown(this.periodicFlusher.getThread());
}
if (this.cacheFlusher != null) {
this.cacheFlusher.join();
}
if (this.healthCheckChore != null) {
Threads.shutdown(this.healthCheckChore.getThread());
}
if (this.spanReceiverHost != null) {
this.spanReceiverHost.closeReceivers();
}
if (this.hlogRoller != null) {
Threads.shutdown(this.hlogRoller.getThread());
}
if (this.metaHLogRoller != null) {
Threads.shutdown(this.metaHLogRoller.getThread());
}
if (this.compactSplitThread != null) {
this.compactSplitThread.join();
}
if (this.service != null) this.service.shutdown();
if (this.replicationSourceHandler != null &&
this.replicationSourceHandler == this.replicationSinkHandler) {
this.replicationSourceHandler.stopReplicationService();
} else {
if (this.replicationSourceHandler != null) {
this.replicationSourceHandler.stopReplicationService();
}
if (this.replicationSinkHandler != null) {
this.replicationSinkHandler.stopReplicationService();
}
}
}
@Override
public boolean reportRegionStateTransition(TransitionCode code, HRegionInfo... hris) {
return reportRegionStateTransition(code, HConstants.NO_SEQNUM, hris);
}
@Override
public boolean reportRegionStateTransition(TransitionCode code, long openSeqNum, HRegionInfo... hris) {
return reportRegionStateTransition(
new RegionStateTransitionContext(code, HConstants.NO_SEQNUM, -1, hris));
}
@Override
public boolean reportRegionStateTransition(RegionStateTransitionContext context) {
TransitionCode code = context.getCode();
long openSeqNum = context.getOpenSeqNum();
long masterSystemTime = context.getMasterSystemTime();
HRegionInfo[] hris = context.getHris();
ReportRegionStateTransitionRequest.Builder builder = ReportRegionStateTransitionRequest.newBuilder();
builder.setServer(ProtobufUtil.toServerName(serverName));
RegionStateTransition.Builder transition = builder.addTransitionBuilder();
transition.setTransitionCode(code);
if (code == TransitionCode.OPENED && openSeqNum >= 0) {
transition.setOpenSeqNum(openSeqNum);
}
for (HRegionInfo hri : hris) {
transition.addRegionInfo(HRegionInfo.convert(hri));
}
ReportRegionStateTransitionRequest request = builder.build();
while (keepLooping()) {
RegionServerStatusService.BlockingInterface rss = rssStub;
try {
if (rss == null) {
createRegionServerStatusStub();
continue;
}
ReportRegionStateTransitionResponse response = rss.reportRegionStateTransition(null, request);
if (response.hasErrorMessage()) {
LOG.info("Failed to transition " + hris[0] + " to " + code + ": "
+ response.getErrorMessage());
return false;
}
return true;
} catch (ServiceException se) {
IOException ioe = ProtobufUtil.getRemoteException(se);
LOG.info("Failed to report region transition, will retry", ioe);
if (rssStub == rss) {
rssStub = null;
}
}
}
return false;
}
/**
* Get the current master from ZooKeeper and open the RPC connection to it.
* To get a fresh connection, the current rssStub must be null.
* Method will block until a master is available. You can break from this
* block by requesting the server stop.
*
* @return master + port, or null if server has been stopped
*/
@VisibleForTesting
protected synchronized ServerName
createRegionServerStatusStub() {
if (rssStub != null) {
return masterAddressTracker.getMasterAddress();
}
ServerName sn = null;
long previousLogTime = 0;
RegionServerStatusService.BlockingInterface master = null;
boolean refresh = false; // for the first time, use cached data
RegionServerStatusService.BlockingInterface intf = null;
while (keepLooping() && master == null) {
sn = this.masterAddressTracker.getMasterAddress(refresh);
if (sn == null) {
if (!keepLooping()) {
// give up with no connection.
LOG.debug("No master found and cluster is stopped; bailing out");
return null;
}
LOG.debug("No master found; retry");
previousLogTime = System.currentTimeMillis();
refresh = true; // let's try pull it from ZK directly
sleeper.sleep();
continue;
}
new InetSocketAddress(sn.getHostname(), sn.getPort());
try {
BlockingRpcChannel channel =
this.rpcClient.createBlockingRpcChannel(sn, userProvider.getCurrent(), this.rpcTimeout);
intf = RegionServerStatusService.newBlockingStub(channel);
break;
} catch (IOException e) {
e = e instanceof RemoteException ?
((RemoteException)e).unwrapRemoteException() : e;
if (e instanceof ServerNotRunningYetException) {
if (System.currentTimeMillis() > (previousLogTime+1000)){
LOG.info("Master isn't available yet, retrying");
previousLogTime = System.currentTimeMillis();
}
} else {
if (System.currentTimeMillis() > (previousLogTime + 1000)) {
LOG.warn("Unable to connect to master. Retrying. Error was:", e);
previousLogTime = System.currentTimeMillis();
}
}
try {
Thread.sleep(200);
} catch (InterruptedException ignored) {
}
}
}
rssStub = intf;
return sn;
}
/**
* @return True if we should break loop because cluster is going down or
* this server has been stopped or hdfs has gone bad.
*/
private boolean keepLooping() {
return !this.stopped && isClusterUp();
}
/*
* Let the master know we're here Run initialization using parameters passed
* us by the master.
* @return A Map of key/value configurations we got from the Master else
* null if we failed to register.
* @throws IOException
*/
private RegionServerStartupResponse reportForDuty() throws IOException {
ServerName masterServerName = createRegionServerStatusStub();
if (masterServerName == null) return null;
RegionServerStartupResponse result = null;
try {
this.requestCount.set(0);
LOG.info("reportForDuty to master=" + masterServerName + " with port=" + this.isa.getPort() +
", startcode=" + this.startcode);
long now = EnvironmentEdgeManager.currentTimeMillis();
int port = this.isa.getPort();
RegionServerStartupRequest.Builder request = RegionServerStartupRequest.newBuilder();
request.setPort(port);
request.setServerStartCode(this.startcode);
request.setServerCurrentTime(now);
result = this.rssStub.regionServerStartup(null, request.build());
} catch (ServiceException se) {
IOException ioe = ProtobufUtil.getRemoteException(se);
if (ioe instanceof ClockOutOfSyncException) {
LOG.fatal("Master rejected startup because clock is out of sync", ioe);
// Re-throw IOE will cause RS to abort
throw ioe;
} else if (ioe instanceof ServerNotRunningYetException) {
LOG.debug("Master is not running yet");
} else {
LOG.warn("error telling master we are up", se);
rssStub = null;
}
}
return result;
}
@Override
public long getLastSequenceId(byte[] encodedRegionName) {
long lastFlushedSequenceId = -1L;
try {
GetLastFlushedSequenceIdRequest req = RequestConverter
.buildGetLastFlushedSequenceIdRequest(encodedRegionName);
lastFlushedSequenceId = rssStub.getLastFlushedSequenceId(null, req)
.getLastFlushedSequenceId();
} catch (ServiceException e) {
lastFlushedSequenceId = -1L;
LOG.warn("Unable to connect to the master to check " + "the last flushed sequence id", e);
}
return lastFlushedSequenceId;
}
/**
* Closes all regions. Called on our way out.
* Assumes that its not possible for new regions to be added to onlineRegions
* while this method runs.
*/
protected void closeAllRegions(final boolean abort) {
closeUserRegions(abort);
closeMetaTableRegions(abort);
}
/**
* Close meta region if we carry it
* @param abort Whether we're running an abort.
*/
void closeMetaTableRegions(final boolean abort) {
HRegion meta = null;
this.lock.writeLock().lock();
try {
for (Map.Entry e: onlineRegions.entrySet()) {
HRegionInfo hri = e.getValue().getRegionInfo();
if (hri.isMetaRegion()) {
meta = e.getValue();
}
if (meta != null) break;
}
} finally {
this.lock.writeLock().unlock();
}
if (meta != null) closeRegionIgnoreErrors(meta.getRegionInfo(), abort);
}
/**
* Schedule closes on all user regions.
* Should be safe calling multiple times because it wont' close regions
* that are already closed or that are closing.
* @param abort Whether we're running an abort.
*/
void closeUserRegions(final boolean abort) {
this.lock.writeLock().lock();
try {
for (Map.Entry e: this.onlineRegions.entrySet()) {
HRegion r = e.getValue();
if (!r.getRegionInfo().isMetaTable() && r.isAvailable()) {
// Don't update zk with this close transition; pass false.
closeRegionIgnoreErrors(r.getRegionInfo(), abort);
}
}
} finally {
this.lock.writeLock().unlock();
}
}
/** @return the info server */
public InfoServer getInfoServer() {
return infoServer;
}
/**
* @return true if a stop has been requested.
*/
@Override
public boolean isStopped() {
return this.stopped;
}
@Override
public boolean isStopping() {
return this.stopping;
}
@Override
public Map getRecoveringRegions() {
return this.recoveringRegions;
}
/**
*
* @return the configuration
*/
@Override
public Configuration getConfiguration() {
return conf;
}
/** @return the write lock for the server */
ReentrantReadWriteLock.WriteLock getWriteLock() {
return lock.writeLock();
}
public int getNumberOfOnlineRegions() {
return this.onlineRegions.size();
}
boolean isOnlineRegionsEmpty() {
return this.onlineRegions.isEmpty();
}
/**
* For tests, web ui and metrics.
* This method will only work if HRegionServer is in the same JVM as client;
* HRegion cannot be serialized to cross an rpc.
*/
public Collection getOnlineRegionsLocalContext() {
Collection regions = this.onlineRegions.values();
return Collections.unmodifiableCollection(regions);
}
@Override
public void addToOnlineRegions(HRegion region) {
this.onlineRegions.put(region.getRegionInfo().getEncodedName(), region);
}
/**
* @return A new Map of online regions sorted by region size with the first entry being the
* biggest. If two regions are the same size, then the last one found wins; i.e. this method
* may NOT return all regions.
*/
SortedMap getCopyOfOnlineRegionsSortedBySize() {
// we'll sort the regions in reverse
SortedMap sortedRegions = new TreeMap(
new Comparator() {
@Override
public int compare(Long a, Long b) {
return -1 * a.compareTo(b);
}
});
// Copy over all regions. Regions are sorted by size with biggest first.
for (HRegion region : this.onlineRegions.values()) {
sortedRegions.put(region.memstoreSize.get(), region);
}
return sortedRegions;
}
/**
* @return time stamp in millis of when this region server was started
*/
public long getStartcode() {
return this.startcode;
}
/** @return reference to FlushRequester */
@Override
public FlushRequester getFlushRequester() {
return this.cacheFlusher;
}
/**
* Get the top N most loaded regions this server is serving so we can tell the
* master which regions it can reallocate if we're overloaded. TODO: actually
* calculate which regions are most loaded. (Right now, we're just grabbing
* the first N regions being served regardless of load.)
*/
protected HRegionInfo[] getMostLoadedRegions() {
ArrayList regions = new ArrayList();
for (HRegion r : onlineRegions.values()) {
if (!r.isAvailable()) {
continue;
}
if (regions.size() < numRegionsToReport) {
regions.add(r.getRegionInfo());
} else {
break;
}
}
return regions.toArray(new HRegionInfo[regions.size()]);
}
@Override
public Leases getLeases() {
return leases;
}
/**
* @return Return the rootDir.
*/
protected Path getRootDir() {
return rootDir;
}
/**
* @return Return the fs.
*/
@Override
public FileSystem getFileSystem() {
return fs;
}
@Override
public String toString() {
return getServerName().toString();
}
/**
* Interval at which threads should run
*
* @return the interval
*/
public int getThreadWakeFrequency() {
return threadWakeFrequency;
}
@Override
public ZooKeeperWatcher getZooKeeper() {
return zooKeeper;
}
@Override
public ServerName getServerName() {
// Our servername could change after we talk to the master.
return this.serverNameFromMasterPOV == null?
ServerName.valueOf(this.isa.getHostName(), this.isa.getPort(), this.startcode) :
this.serverNameFromMasterPOV;
}
@Override
public CompactionRequestor getCompactionRequester() {
return this.compactSplitThread;
}
public ZooKeeperWatcher getZooKeeperWatcher() {
return this.zooKeeper;
}
public RegionServerCoprocessorHost getCoprocessorHost(){
return this.rsHost;
}
@Override
public ConcurrentMap getRegionsInTransitionInRS() {
return this.regionsInTransitionInRS;
}
@Override
public ExecutorService getExecutorService() {
return service;
}
//
// Main program and support routines
//
/**
* Load the replication service objects, if any
*/
static private void createNewReplicationInstance(Configuration conf,
HRegionServer server, FileSystem fs, Path logDir, Path oldLogDir) throws IOException{
// If replication is not enabled, then return immediately.
if (!conf.getBoolean(HConstants.REPLICATION_ENABLE_KEY,
HConstants.REPLICATION_ENABLE_DEFAULT)) {
return;
}
// read in the name of the source replication class from the config file.
String sourceClassname = conf.get(HConstants.REPLICATION_SOURCE_SERVICE_CLASSNAME,
HConstants.REPLICATION_SERVICE_CLASSNAME_DEFAULT);
// read in the name of the sink replication class from the config file.
String sinkClassname = conf.get(HConstants.REPLICATION_SINK_SERVICE_CLASSNAME,
HConstants.REPLICATION_SERVICE_CLASSNAME_DEFAULT);
// If both the sink and the source class names are the same, then instantiate
// only one object.
if (sourceClassname.equals(sinkClassname)) {
server.replicationSourceHandler = (ReplicationSourceService)
newReplicationInstance(sourceClassname,
conf, server, fs, logDir, oldLogDir);
server.replicationSinkHandler = (ReplicationSinkService)
server.replicationSourceHandler;
} else {
server.replicationSourceHandler = (ReplicationSourceService)
newReplicationInstance(sourceClassname,
conf, server, fs, logDir, oldLogDir);
server.replicationSinkHandler = (ReplicationSinkService)
newReplicationInstance(sinkClassname,
conf, server, fs, logDir, oldLogDir);
}
}
static private ReplicationService newReplicationInstance(String classname,
Configuration conf, HRegionServer server, FileSystem fs, Path logDir,
Path oldLogDir) throws IOException{
Class clazz = null;
try {
ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
clazz = Class.forName(classname, true, classLoader);
} catch (java.lang.ClassNotFoundException nfe) {
throw new IOException("Could not find class for " + classname);
}
// create an instance of the replication object.
ReplicationService service = (ReplicationService)
ReflectionUtils.newInstance(clazz, conf);
service.initialize(server, fs, logDir, oldLogDir);
return service;
}
/**
* @param hrs
* @return Thread the RegionServer is running in correctly named.
* @throws IOException
*/
public static Thread startRegionServer(final HRegionServer hrs)
throws IOException {
return startRegionServer(hrs, "regionserver" + hrs.isa.getPort());
}
/**
* @param hrs
* @param name
* @return Thread the RegionServer is running in correctly named.
* @throws IOException
*/
public static Thread startRegionServer(final HRegionServer hrs,
final String name) throws IOException {
Thread t = new Thread(hrs);
t.setName(name);
t.start();
// Install shutdown hook that will catch signals and run an orderly shutdown
// of the hrs.
ShutdownHook.install(hrs.getConfiguration(), FileSystem.get(hrs
.getConfiguration()), hrs, t);
return t;
}
/**
* Utility for constructing an instance of the passed HRegionServer class.
*
* @param regionServerClass
* @param conf2
* @return HRegionServer instance.
*/
public static HRegionServer constructRegionServer(
Class regionServerClass,
final Configuration conf2) {
try {
Constructor c = regionServerClass
.getConstructor(Configuration.class);
return c.newInstance(conf2);
} catch (Exception e) {
throw new RuntimeException("Failed construction of " + "Regionserver: "
+ regionServerClass.toString(), e);
}
}
/**
* @see org.apache.hadoop.hbase.regionserver.HRegionServerCommandLine
*/
public static void main(String[] args) throws Exception {
VersionInfo.logVersion();
Configuration conf = HBaseConfiguration.create();
@SuppressWarnings("unchecked")
Class regionServerClass = (Class) conf
.getClass(HConstants.REGION_SERVER_IMPL, HRegionServer.class);
new HRegionServerCommandLine(regionServerClass).doMain(args);
}
/**
* Gets the online regions of the specified table.
* This method looks at the in-memory onlineRegions. It does not go to hbase:meta.
* Only returns online regions. If a region on this table has been
* closed during a disable, etc., it will not be included in the returned list.
* So, the returned list may not necessarily be ALL regions in this table, its
* all the ONLINE regions in the table.
* @param tableName
* @return Online regions from tableName
*/
@Override
public List getOnlineRegions(TableName tableName) {
List tableRegions = new ArrayList();
synchronized (this.onlineRegions) {
for (HRegion region: this.onlineRegions.values()) {
HRegionInfo regionInfo = region.getRegionInfo();
if(regionInfo.getTable().equals(tableName)) {
tableRegions.add(region);
}
}
}
return tableRegions;
}
// used by org/apache/hbase/tmpl/regionserver/RSStatusTmpl.jamon (HBASE-4070).
public String[] getCoprocessors() {
TreeSet coprocessors = new TreeSet(
this.hlog.getCoprocessorHost().getCoprocessors());
Collection regions = getOnlineRegionsLocalContext();
for (HRegion region: regions) {
coprocessors.addAll(region.getCoprocessorHost().getCoprocessors());
}
return coprocessors.toArray(new String[coprocessors.size()]);
}
/**
* Instantiated as a scanner lease. If the lease times out, the scanner is
* closed
*/
private class ScannerListener implements LeaseListener {
private final String scannerName;
ScannerListener(final String n) {
this.scannerName = n;
}
@Override
public void leaseExpired() {
RegionScannerHolder rsh = scanners.remove(this.scannerName);
if (rsh != null) {
RegionScanner s = rsh.s;
LOG.info("Scanner " + this.scannerName + " lease expired on region "
+ s.getRegionInfo().getRegionNameAsString());
try {
HRegion region = getRegion(s.getRegionInfo().getRegionName());
if (region != null && region.getCoprocessorHost() != null) {
region.getCoprocessorHost().preScannerClose(s);
}
s.close();
if (region != null && region.getCoprocessorHost() != null) {
region.getCoprocessorHost().postScannerClose(s);
}
} catch (IOException e) {
LOG.error("Closing scanner for "
+ s.getRegionInfo().getRegionNameAsString(), e);
}
} else {
LOG.info("Scanner " + this.scannerName + " lease expired");
}
}
}
/**
* Called to verify that this server is up and running.
*
* @throws IOException
*/
protected void checkOpen() throws IOException {
if (this.stopped || this.abortRequested) {
throw new RegionServerStoppedException("Server " + getServerName() +
" not running" + (this.abortRequested ? ", aborting" : ""));
}
if (!fsOk) {
throw new RegionServerStoppedException("File system not available");
}
}
/**
* Try to close the region, logs a warning on failure but continues.
* @param region Region to close
*/
private void closeRegionIgnoreErrors(HRegionInfo region, final boolean abort) {
try {
if (!closeRegion(region.getEncodedName(), abort, false, -1, null)) {
LOG.warn("Failed to close " + region.getRegionNameAsString() +
" - ignoring and continuing");
}
} catch (IOException e) {
LOG.warn("Failed to close " + region.getRegionNameAsString() +
" - ignoring and continuing", e);
}
}
/**
* Close asynchronously a region, can be called from the master or internally by the regionserver
* when stopping. If called from the master, the region will update the znode status.
*
*
* If an opening was in progress, this method will cancel it, but will not start a new close. The
* coprocessors are not called in this case. A NotServingRegionException exception is thrown.
*
*
* If a close was in progress, this new request will be ignored, and an exception thrown.
*
*
* @param encodedName Region to close
* @param abort True if we are aborting
* @param zk True if we are to update zk about the region close; if the close
* was orchestrated by master, then update zk. If the close is being run by
* the regionserver because its going down, don't update zk.
* @param versionOfClosingNode the version of znode to compare when RS transitions the znode from
* CLOSING state.
* @return True if closed a region.
* @throws NotServingRegionException if the region is not online
* @throws RegionAlreadyInTransitionException if the region is already closing
*/
protected boolean closeRegion(String encodedName, final boolean abort,
final boolean zk, final int versionOfClosingNode, final ServerName sn)
throws NotServingRegionException, RegionAlreadyInTransitionException {
//Check for permissions to close.
HRegion actualRegion = this.getFromOnlineRegions(encodedName);
if ((actualRegion != null) && (actualRegion.getCoprocessorHost() != null)) {
try {
actualRegion.getCoprocessorHost().preClose(false);
} catch (IOException exp) {
LOG.warn("Unable to close region: the coprocessor launched an error ", exp);
return false;
}
}
final Boolean previous = this.regionsInTransitionInRS.putIfAbsent(encodedName.getBytes(),
Boolean.FALSE);
if (Boolean.TRUE.equals(previous)) {
LOG.info("Received CLOSE for the region:" + encodedName + " , which we are already " +
"trying to OPEN. Cancelling OPENING.");
if (!regionsInTransitionInRS.replace(encodedName.getBytes(), previous, Boolean.FALSE)){
// The replace failed. That should be an exceptional case, but theoretically it can happen.
// We're going to try to do a standard close then.
LOG.warn("The opening for region " + encodedName + " was done before we could cancel it." +
" Doing a standard close now");
return closeRegion(encodedName, abort, zk, versionOfClosingNode, sn);
}
// Let's get the region from the online region list again
actualRegion = this.getFromOnlineRegions(encodedName);
if (actualRegion == null) { // If already online, we still need to close it.
LOG.info("The opening previously in progress has been cancelled by a CLOSE request.");
// The master deletes the znode when it receives this exception.
throw new RegionAlreadyInTransitionException("The region " + encodedName +
" was opening but not yet served. Opening is cancelled.");
}
} else if (Boolean.FALSE.equals(previous)) {
LOG.info("Received CLOSE for the region: " + encodedName +
" ,which we are already trying to CLOSE, but not completed yet");
// The master will retry till the region is closed. We need to do this since
// the region could fail to close somehow. If we mark the region closed in master
// while it is not, there could be data loss.
// If the region stuck in closing for a while, and master runs out of retries,
// master will move the region to failed_to_close. Later on, if the region
// is indeed closed, master can properly re-assign it.
throw new RegionAlreadyInTransitionException("The region " + encodedName +
" was already closing. New CLOSE request is ignored.");
}
if (actualRegion == null) {
LOG.error("Received CLOSE for a region which is not online, and we're not opening.");
this.regionsInTransitionInRS.remove(encodedName.getBytes());
// The master deletes the znode when it receives this exception.
throw new NotServingRegionException("The region " + encodedName +
" is not online, and is not opening.");
}
CloseRegionHandler crh;
final HRegionInfo hri = actualRegion.getRegionInfo();
if (hri.isMetaRegion()) {
crh = new CloseMetaHandler(this, this, hri, abort, zk, versionOfClosingNode);
} else {
crh = new CloseRegionHandler(this, this, hri, abort, zk, versionOfClosingNode, sn);
}
this.service.submit(crh);
return true;
}
/**
* @param regionName
* @return HRegion for the passed binary regionName or null if
* named region is not member of the online regions.
*/
public HRegion getOnlineRegion(final byte[] regionName) {
String encodedRegionName = HRegionInfo.encodeRegionName(regionName);
return this.onlineRegions.get(encodedRegionName);
}
public InetSocketAddress[] getRegionBlockLocations(final String encodedRegionName) {
return this.regionFavoredNodesMap.get(encodedRegionName);
}
@Override
public HRegion getFromOnlineRegions(final String encodedRegionName) {
return this.onlineRegions.get(encodedRegionName);
}
@Override
public boolean removeFromOnlineRegions(final HRegion r, ServerName destination) {
HRegion toReturn = this.onlineRegions.remove(r.getRegionInfo().getEncodedName());
if (destination != null) {
HLog wal = getWAL();
long closeSeqNum = wal.getEarliestMemstoreSeqNum(r.getRegionInfo().getEncodedNameAsBytes());
if (closeSeqNum == HConstants.NO_SEQNUM) {
// No edits in WAL for this region; get the sequence number when the region was opened.
closeSeqNum = r.getOpenSeqNum();
if (closeSeqNum == HConstants.NO_SEQNUM) {
closeSeqNum = 0;
}
}
addToMovedRegions(r.getRegionInfo().getEncodedName(), destination, closeSeqNum);
}
this.regionFavoredNodesMap.remove(r.getRegionInfo().getEncodedName());
return toReturn != null;
}
/**
* Protected utility method for safely obtaining an HRegion handle.
*
* @param regionName
* Name of online {@link HRegion} to return
* @return {@link HRegion} for regionName
* @throws NotServingRegionException
*/
protected HRegion getRegion(final byte[] regionName)
throws NotServingRegionException {
String encodedRegionName = HRegionInfo.encodeRegionName(regionName);
return getRegionByEncodedName(regionName, encodedRegionName);
}
protected HRegion getRegionByEncodedName(String encodedRegionName)
throws NotServingRegionException {
return getRegionByEncodedName(null, encodedRegionName);
}
protected HRegion getRegionByEncodedName(byte[] regionName, String encodedRegionName)
throws NotServingRegionException {
HRegion region = this.onlineRegions.get(encodedRegionName);
if (region == null) {
MovedRegionInfo moveInfo = getMovedRegion(encodedRegionName);
if (moveInfo != null) {
throw new RegionMovedException(moveInfo.getServerName(), moveInfo.getSeqNum());
}
Boolean isOpening = this.regionsInTransitionInRS.get(Bytes.toBytes(encodedRegionName));
String regionNameStr = regionName == null?
encodedRegionName: Bytes.toStringBinary(regionName);
if (isOpening != null && isOpening.booleanValue()) {
throw new RegionOpeningException("Region " + regionNameStr +
" is opening on " + this.serverNameFromMasterPOV);
}
throw new NotServingRegionException("Region " + regionNameStr +
" is not online on " + this.serverNameFromMasterPOV);
}
return region;
}
/*
* Cleanup after Throwable caught invoking method. Converts t to
* IOE if it isn't already.
*
* @param t Throwable
*
* @return Throwable converted to an IOE; methods can only let out IOEs.
*/
protected Throwable cleanup(final Throwable t) {
return cleanup(t, null);
}
/*
* Cleanup after Throwable caught invoking method. Converts t to
* IOE if it isn't already.
*
* @param t Throwable
*
* @param msg Message to log in error. Can be null.
*
* @return Throwable converted to an IOE; methods can only let out IOEs.
*/
protected Throwable cleanup(final Throwable t, final String msg) {
// Don't log as error if NSRE; NSRE is 'normal' operation.
if (t instanceof NotServingRegionException) {
LOG.debug("NotServingRegionException; " + t.getMessage());
return t;
}
if (msg == null) {
LOG.error("", RemoteExceptionHandler.checkThrowable(t));
} else {
LOG.error(msg, RemoteExceptionHandler.checkThrowable(t));
}
if (!checkOOME(t)) {
checkFileSystem();
}
return t;
}
/*
* @param t
*
* @param msg Message to put in new IOE if passed t is not an IOE
*
* @return Make t an IOE if it isn't already.
*/
protected IOException convertThrowableToIOE(final Throwable t, final String msg) {
return (t instanceof IOException ? (IOException) t : msg == null
|| msg.length() == 0 ? new IOException(t) : new IOException(msg, t));
}
/*
* Check if an OOME and, if so, abort immediately to avoid creating more objects.
*
* @param e
*
* @return True if we OOME'd and are aborting.
*/
@Override
public boolean checkOOME(final Throwable e) {
boolean stop = false;
try {
if (e instanceof OutOfMemoryError
|| (e.getCause() != null && e.getCause() instanceof OutOfMemoryError)
|| (e.getMessage() != null && e.getMessage().contains(
"java.lang.OutOfMemoryError"))) {
stop = true;
LOG.fatal(
"Run out of memory; HRegionServer will abort itself immediately", e);
}
} finally {
if (stop) {
Runtime.getRuntime().halt(1);
}
}
return stop;
}
/**
* Checks to see if the file system is still accessible. If not, sets
* abortRequested and stopRequested
*
* @return false if file system is not available
*/
public boolean checkFileSystem() {
if (this.fsOk && this.fs != null) {
try {
FSUtils.checkFileSystemAvailable(this.fs);
} catch (IOException e) {
abort("File System not available", e);
this.fsOk = false;
}
}
return this.fsOk;
}
protected long addScanner(RegionScanner s, HRegion r) throws LeaseStillHeldException {
long scannerId = this.scannerIdGen.incrementAndGet();
String scannerName = String.valueOf(scannerId);
RegionScannerHolder existing =
scanners.putIfAbsent(scannerName, new RegionScannerHolder(s, r));
assert existing == null : "scannerId must be unique within regionserver's whole lifecycle!";
this.leases.createLease(scannerName, this.scannerLeaseTimeoutPeriod,
new ScannerListener(scannerName));
return scannerId;
}
// Start Client methods
/**
* Get data from a table.
*
* @param controller the RPC controller
* @param request the get request
* @throws ServiceException
*/
@Override
public GetResponse get(final RpcController controller,
final GetRequest request) throws ServiceException {
long before = EnvironmentEdgeManager.currentTimeMillis();
try {
checkOpen();
requestCount.increment();
HRegion region = getRegion(request.getRegion());
GetResponse.Builder builder = GetResponse.newBuilder();
ClientProtos.Get get = request.getGet();
Boolean existence = null;
Result r = null;
if (get.hasClosestRowBefore() && get.getClosestRowBefore()) {
if (get.getColumnCount() != 1) {
throw new DoNotRetryIOException(
"get ClosestRowBefore supports one and only one family now, not "
+ get.getColumnCount() + " families");
}
byte[] row = get.getRow().toByteArray();
byte[] family = get.getColumn(0).getFamily().toByteArray();
r = region.getClosestRowBefore(row, family);
} else {
Get clientGet = ProtobufUtil.toGet(get);
if (get.getExistenceOnly() && region.getCoprocessorHost() != null) {
existence = region.getCoprocessorHost().preExists(clientGet);
}
if (existence == null) {
r = region.get(clientGet);
if (get.getExistenceOnly()) {
boolean exists = r.getExists();
if (region.getCoprocessorHost() != null) {
exists = region.getCoprocessorHost().postExists(clientGet, exists);
}
existence = exists;
}
}
}
if (existence != null){
ClientProtos.Result pbr = ProtobufUtil.toResult(existence);
builder.setResult(pbr);
} else if (r != null) {
ClientProtos.Result pbr = ProtobufUtil.toResult(r);
builder.setResult(pbr);
}
return builder.build();
} catch (IOException ie) {
throw new ServiceException(ie);
} finally {
metricsRegionServer.updateGet(EnvironmentEdgeManager.currentTimeMillis() - before);
}
}
/**
* Mutate data in a table.
*
* @param rpcc the RPC controller
* @param request the mutate request
* @throws ServiceException
*/
@Override
public MutateResponse mutate(final RpcController rpcc,
final MutateRequest request) throws ServiceException {
// rpc controller is how we bring in data via the back door; it is unprotobuf'ed data.
// It is also the conduit via which we pass back data.
PayloadCarryingRpcController controller = (PayloadCarryingRpcController)rpcc;
CellScanner cellScanner = controller != null? controller.cellScanner(): null;
// Clear scanner so we are not holding on to reference across call.
if (controller != null) controller.setCellScanner(null);
try {
checkOpen();
requestCount.increment();
HRegion region = getRegion(request.getRegion());
MutateResponse.Builder builder = MutateResponse.newBuilder();
MutationProto mutation = request.getMutation();
if (!region.getRegionInfo().isMetaTable()) {
cacheFlusher.reclaimMemStoreMemory();
}
long nonceGroup = request.hasNonceGroup()
? request.getNonceGroup() : HConstants.NO_NONCE;
Result r = null;
Boolean processed = null;
MutationType type = mutation.getMutateType();
switch (type) {
case APPEND:
// TODO: this doesn't actually check anything.
r = append(region, mutation, cellScanner, nonceGroup);
break;
case INCREMENT:
// TODO: this doesn't actually check anything.
r = increment(region, mutation, cellScanner, nonceGroup);
break;
case PUT:
Put put = ProtobufUtil.toPut(mutation, cellScanner);
if (request.hasCondition()) {
Condition condition = request.getCondition();
byte[] row = condition.getRow().toByteArray();
byte[] family = condition.getFamily().toByteArray();
byte[] qualifier = condition.getQualifier().toByteArray();
CompareOp compareOp = CompareOp.valueOf(condition.getCompareType().name());
ByteArrayComparable comparator =
ProtobufUtil.toComparator(condition.getComparator());
if (region.getCoprocessorHost() != null) {
processed = region.getCoprocessorHost().preCheckAndPut(
row, family, qualifier, compareOp, comparator, put);
}
if (processed == null) {
boolean result = region.checkAndMutate(row, family,
qualifier, compareOp, comparator, put, true);
if (region.getCoprocessorHost() != null) {
result = region.getCoprocessorHost().postCheckAndPut(row, family,
qualifier, compareOp, comparator, put, result);
}
processed = result;
}
} else {
region.put(put);
processed = Boolean.TRUE;
}
break;
case DELETE:
Delete delete = ProtobufUtil.toDelete(mutation, cellScanner);
if (request.hasCondition()) {
Condition condition = request.getCondition();
byte[] row = condition.getRow().toByteArray();
byte[] family = condition.getFamily().toByteArray();
byte[] qualifier = condition.getQualifier().toByteArray();
CompareOp compareOp = CompareOp.valueOf(condition.getCompareType().name());
ByteArrayComparable comparator =
ProtobufUtil.toComparator(condition.getComparator());
if (region.getCoprocessorHost() != null) {
processed = region.getCoprocessorHost().preCheckAndDelete(
row, family, qualifier, compareOp, comparator, delete);
}
if (processed == null) {
boolean result = region.checkAndMutate(row, family,
qualifier, compareOp, comparator, delete, true);
if (region.getCoprocessorHost() != null) {
result = region.getCoprocessorHost().postCheckAndDelete(row, family,
qualifier, compareOp, comparator, delete, result);
}
processed = result;
}
} else {
region.delete(delete);
processed = Boolean.TRUE;
}
break;
default:
throw new DoNotRetryIOException(
"Unsupported mutate type: " + type.name());
}
if (processed != null) builder.setProcessed(processed.booleanValue());
addResult(builder, r, controller);
return builder.build();
} catch (IOException ie) {
checkFileSystem();
throw new ServiceException(ie);
}
}
/**
* @return True if current call supports cellblocks
*/
private boolean isClientCellBlockSupport() {
RpcCallContext context = RpcServer.getCurrentCall();
return context != null && context.isClientCellBlockSupport();
}
private void addResult(final MutateResponse.Builder builder,
final Result result, final PayloadCarryingRpcController rpcc) {
if (result == null) return;
if (isClientCellBlockSupport()) {
builder.setResult(ProtobufUtil.toResultNoData(result));
rpcc.setCellScanner(result.cellScanner());
} else {
ClientProtos.Result pbr = ProtobufUtil.toResult(result);
builder.setResult(pbr);
}
}
//
// remote scanner interface
//
/**
* Scan data in a table.
*
* @param controller the RPC controller
* @param request the scan request
* @throws ServiceException
*/
@Override
public ScanResponse scan(final RpcController controller, final ScanRequest request)
throws ServiceException {
Leases.Lease lease = null;
String scannerName = null;
try {
if (!request.hasScannerId() && !request.hasScan()) {
throw new DoNotRetryIOException(
"Missing required input: scannerId or scan");
}
long scannerId = -1;
if (request.hasScannerId()) {
scannerId = request.getScannerId();
scannerName = String.valueOf(scannerId);
}
try {
checkOpen();
} catch (IOException e) {
// If checkOpen failed, server not running or filesystem gone,
// cancel this lease; filesystem is gone or we're closing or something.
if (scannerName != null) {
try {
leases.cancelLease(scannerName);
} catch (LeaseException le) {
LOG.info("Server shutting down and client tried to access missing scanner " +
scannerName);
}
}
throw e;
}
requestCount.increment();
int ttl = 0;
HRegion region = null;
RegionScanner scanner = null;
RegionScannerHolder rsh = null;
boolean moreResults = true;
boolean closeScanner = false;
ScanResponse.Builder builder = ScanResponse.newBuilder();
if (request.hasCloseScanner()) {
closeScanner = request.getCloseScanner();
}
int rows = closeScanner ? 0 : 1;
if (request.hasNumberOfRows()) {
rows = request.getNumberOfRows();
}
if (request.hasScannerId()) {
rsh = scanners.get(scannerName);
if (rsh == null) {
LOG.info("Client tried to access missing scanner " + scannerName);
throw new UnknownScannerException(
"Name: " + scannerName + ", already closed?");
}
scanner = rsh.s;
HRegionInfo hri = scanner.getRegionInfo();
region = getRegion(hri.getRegionName());
if (region != rsh.r) { // Yes, should be the same instance
throw new NotServingRegionException("Region was re-opened after the scanner"
+ scannerName + " was created: " + hri.getRegionNameAsString());
}
} else {
region = getRegion(request.getRegion());
ClientProtos.Scan protoScan = request.getScan();
boolean isLoadingCfsOnDemandSet = protoScan.hasLoadColumnFamiliesOnDemand();
Scan scan = ProtobufUtil.toScan(protoScan);
// if the request doesn't set this, get the default region setting.
if (!isLoadingCfsOnDemandSet) {
scan.setLoadColumnFamiliesOnDemand(region.isLoadingCfsOnDemandDefault());
}
scan.getAttribute(Scan.SCAN_ATTRIBUTES_METRICS_ENABLE);
region.prepareScanner(scan);
if (region.getCoprocessorHost() != null) {
scanner = region.getCoprocessorHost().preScannerOpen(scan);
}
if (scanner == null) {
scanner = region.getScanner(scan);
}
if (region.getCoprocessorHost() != null) {
scanner = region.getCoprocessorHost().postScannerOpen(scan, scanner);
}
scannerId = addScanner(scanner, region);
scannerName = String.valueOf(scannerId);
ttl = this.scannerLeaseTimeoutPeriod;
}
if (request.hasRenew() && request.getRenew()) {
rsh = scanners.get(scannerName);
lease = leases.removeLease(scannerName);
if (lease != null && rsh != null) {
leases.addLease(lease);
// Increment the nextCallSeq value which is the next expected from client.
rsh.incNextCallSeq();
}
return builder.build();
}
if (rows > 0) {
// if nextCallSeq does not match throw Exception straight away. This needs to be
// performed even before checking of Lease.
// See HBASE-5974
if (request.hasNextCallSeq()) {
if (rsh == null) {
rsh = scanners.get(scannerName);
}
if (rsh != null) {
if (request.getNextCallSeq() != rsh.getNextCallSeq()) {
throw new OutOfOrderScannerNextException("Expected nextCallSeq: " + rsh.getNextCallSeq()
+ " But the nextCallSeq got from client: " + request.getNextCallSeq() +
"; request=" + TextFormat.shortDebugString(request));
}
// Increment the nextCallSeq value which is the next expected from client.
rsh.incNextCallSeq();
}
}
try {
// Remove lease while its being processed in server; protects against case
// where processing of request takes > lease expiration time.
lease = leases.removeLease(scannerName);
// Limit the initial allocation of the result array to the minimum
// of 'rows' or 100
List results = new ArrayList(Math.min(rows, 100));
long currentScanResultSize = 0;
long totalKvSize = 0;
boolean done = false;
// Call coprocessor. Get region info from scanner.
if (region != null && region.getCoprocessorHost() != null) {
Boolean bypass = region.getCoprocessorHost().preScannerNext(
scanner, results, rows);
if (!results.isEmpty()) {
for (Result r : results) {
if (maxScannerResultSize < Long.MAX_VALUE){
for (Cell cell : r.rawCells()) {
KeyValue kv = KeyValueUtil.ensureKeyValue(cell);
currentScanResultSize += kv.heapSizeWithoutTags();
totalKvSize += kv.getLength();
}
}
}
}
if (bypass != null && bypass.booleanValue()) {
done = true;
}
}
if (!done) {
long maxResultSize = scanner.getMaxResultSize();
if (maxResultSize <= 0) {
maxResultSize = maxScannerResultSize;
}
List values = new ArrayList();
region.startRegionOperation(Operation.SCAN);
try {
int i = 0;
synchronized(scanner) {
boolean moreRows = false;
while (i < rows) {
// Stop collecting results if maxScannerResultSize is set and we have exceeded it
if ((maxResultSize < Long.MAX_VALUE) &&
(currentScanResultSize >= maxResultSize)) {
builder.setMoreResultsInRegion(true);
break;
}
// Collect values to be returned here
moreRows = scanner.nextRaw(values);
if (!values.isEmpty()) {
for (Cell cell : values) {
KeyValue kv = KeyValueUtil.ensureKeyValue(cell);
currentScanResultSize += kv.heapSizeWithoutTags();
totalKvSize += kv.getLength();
}
results.add(Result.create(values));
i++;
}
if (!moreRows) {
break;
}
values.clear();
}
if (currentScanResultSize >= maxResultSize || i >= rows || moreRows) {
// We stopped prematurely
builder.setMoreResultsInRegion(true);
} else {
// We didn't get a single batch
builder.setMoreResultsInRegion(false);
}
}
region.readRequestsCount.add(i);
region.getMetrics().updateScanNext(totalKvSize);
if (metricsRegionServer != null) {
metricsRegionServer.updateScannerNext(totalKvSize);
}
} finally {
region.closeRegionOperation();
}
// coprocessor postNext hook
if (region != null && region.getCoprocessorHost() != null) {
region.getCoprocessorHost().postScannerNext(scanner, results, rows, true);
}
}
// If the scanner's filter - if any - is done with the scan
// and wants to tell the client to stop the scan. This is done by passing
// a null result, and setting moreResults to false.
if (scanner.isFilterDone() && results.isEmpty()) {
moreResults = false;
results = null;
} else {
addResults(builder, results, controller);
}
} catch (IOException e) {
// if we have an exception on scanner next and we are using the callSeq
// we should rollback because the client will retry with the same callSeq
// and get an OutOfOrderScannerNextException if we don't do so.
if (rsh != null && request.hasNextCallSeq()) {
rsh.rollbackNextCallSeq();
}
throw e;
} finally {
// We're done. On way out re-add the above removed lease.
// Adding resets expiration time on lease.
if (scanners.containsKey(scannerName)) {
if (lease != null) leases.addLease(lease);
ttl = this.scannerLeaseTimeoutPeriod;
}
}
}
if (!moreResults || closeScanner) {
ttl = 0;
moreResults = false;
if (region != null && region.getCoprocessorHost() != null) {
if (region.getCoprocessorHost().preScannerClose(scanner)) {
return builder.build(); // bypass
}
}
rsh = scanners.remove(scannerName);
if (rsh != null) {
scanner = rsh.s;
scanner.close();
leases.cancelLease(scannerName);
if (region != null && region.getCoprocessorHost() != null) {
region.getCoprocessorHost().postScannerClose(scanner);
}
}
}
if (ttl > 0) {
builder.setTtl(ttl);
}
builder.setScannerId(scannerId);
builder.setMoreResults(moreResults);
return builder.build();
} catch (IOException ie) {
if (scannerName != null && ie instanceof NotServingRegionException) {
RegionScannerHolder rsh = scanners.remove(scannerName);
if (rsh != null) {
try {
RegionScanner scanner = rsh.s;
LOG.warn(scannerName + " encountered " + ie.getMessage() + ", closing ...");
scanner.close();
leases.cancelLease(scannerName);
} catch (IOException e) {
LOG.warn("Getting exception closing " + scannerName, e);
}
}
}
throw new ServiceException(ie);
}
}
private void addResults(final ScanResponse.Builder builder, final List results,
final RpcController controller) {
if (results == null || results.isEmpty()) return;
if (isClientCellBlockSupport()) {
for (Result res : results) {
builder.addCellsPerResult(res.size());
}
((PayloadCarryingRpcController)controller).
setCellScanner(CellUtil.createCellScanner(results));
} else {
for (Result res: results) {
ClientProtos.Result pbr = ProtobufUtil.toResult(res);
builder.addResults(pbr);
}
}
}
/**
* Atomically bulk load several HFiles into an open region
* @return true if successful, false is failed but recoverably (no action)
* @throws IOException if failed unrecoverably
*/
@Override
public BulkLoadHFileResponse bulkLoadHFile(final RpcController controller,
final BulkLoadHFileRequest request) throws ServiceException {
try {
checkOpen();
requestCount.increment();
HRegion region = getRegion(request.getRegion());
List> familyPaths = new ArrayList>();
for (FamilyPath familyPath: request.getFamilyPathList()) {
familyPaths.add(new Pair(familyPath.getFamily().toByteArray(),
familyPath.getPath()));
}
boolean bypass = false;
if (region.getCoprocessorHost() != null) {
bypass = region.getCoprocessorHost().preBulkLoadHFile(familyPaths);
}
boolean loaded = false;
if (!bypass) {
loaded = region.bulkLoadHFiles(familyPaths, request.getAssignSeqNum());
}
if (region.getCoprocessorHost() != null) {
loaded = region.getCoprocessorHost().postBulkLoadHFile(familyPaths, loaded);
}
BulkLoadHFileResponse.Builder builder = BulkLoadHFileResponse.newBuilder();
builder.setLoaded(loaded);
return builder.build();
} catch (IOException ie) {
throw new ServiceException(ie);
}
}
@Override
public CoprocessorServiceResponse execService(final RpcController controller,
final CoprocessorServiceRequest request) throws ServiceException {
try {
checkOpen();
requestCount.increment();
HRegion region = getRegion(request.getRegion());
Message result = execServiceOnRegion(region, request.getCall());
CoprocessorServiceResponse.Builder builder =
CoprocessorServiceResponse.newBuilder();
builder.setRegion(RequestConverter.buildRegionSpecifier(
RegionSpecifierType.REGION_NAME, region.getRegionName()));
builder.setValue(
builder.getValueBuilder().setName(result.getClass().getName())
.setValue(result.toByteString()));
return builder.build();
} catch (IOException ie) {
throw new ServiceException(ie);
}
}
private Message execServiceOnRegion(HRegion region,
final ClientProtos.CoprocessorServiceCall serviceCall) throws IOException {
// ignore the passed in controller (from the serialized call)
ServerRpcController execController = new ServerRpcController();
Message result = region.execService(execController, serviceCall);
if (execController.getFailedOn() != null) {
throw execController.getFailedOn();
}
return result;
}
@Override
public CoprocessorServiceResponse execRegionServerService(
@SuppressWarnings("UnusedParameters") final RpcController controller,
final CoprocessorServiceRequest serviceRequest) throws ServiceException {
try {
ServerRpcController serviceController = new ServerRpcController();
CoprocessorServiceCall call = serviceRequest.getCall();
String serviceName = call.getServiceName();
String methodName = call.getMethodName();
if (!coprocessorServiceHandlers.containsKey(serviceName)) {
throw new UnknownProtocolException(null,
"No registered coprocessor service found for name " + serviceName);
}
Service service = coprocessorServiceHandlers.get(serviceName);
Descriptors.ServiceDescriptor serviceDesc = service.getDescriptorForType();
Descriptors.MethodDescriptor methodDesc = serviceDesc.findMethodByName(methodName);
if (methodDesc == null) {
throw new UnknownProtocolException(service.getClass(), "Unknown method " + methodName
+ " called on service " + serviceName);
}
Message.Builder builderForType = service.getRequestPrototype(methodDesc).newBuilderForType();
ProtobufUtil.mergeFrom(builderForType, call.getRequest());
Message request = builderForType.build();
final Message.Builder responseBuilder =
service.getResponsePrototype(methodDesc).newBuilderForType();
service.callMethod(methodDesc, serviceController, request, new RpcCallback() {
@Override
public void run(Message message) {
if (message != null) {
responseBuilder.mergeFrom(message);
}
}
});
IOException exception = ResponseConverter.getControllerException(serviceController);
if (exception != null) {
throw exception;
}
Message execResult = responseBuilder.build();
ClientProtos.CoprocessorServiceResponse.Builder builder =
ClientProtos.CoprocessorServiceResponse.newBuilder();
builder.setRegion(RequestConverter.buildRegionSpecifier(RegionSpecifierType.REGION_NAME,
HConstants.EMPTY_BYTE_ARRAY));
builder.setValue(builder.getValueBuilder().setName(execResult.getClass().getName())
.setValue(execResult.toByteString()));
return builder.build();
} catch (IOException ie) {
throw new ServiceException(ie);
}
}
/**
* @return Return the object that implements the replication
* source service.
*/
public ReplicationSourceService getReplicationSourceService() {
return replicationSourceHandler;
}
/**
* @return Return the object that implements the replication
* sink service.
*/
public ReplicationSinkService getReplicationSinkService() {
return replicationSinkHandler;
}
/**
* Execute multiple actions on a table: get, mutate, and/or execCoprocessor
*
* @param rpcc the RPC controller
* @param request the multi request
* @throws ServiceException
*/
@Override
public MultiResponse multi(final RpcController rpcc, final MultiRequest request)
throws ServiceException {
try {
checkOpen();
} catch (IOException ie) {
throw new ServiceException(ie);
}
// rpc controller is how we bring in data via the back door; it is unprotobuf'ed data.
// It is also the conduit via which we pass back data.
PayloadCarryingRpcController controller = (PayloadCarryingRpcController)rpcc;
CellScanner cellScanner = controller != null ? controller.cellScanner(): null;
if (controller != null) controller.setCellScanner(null);
long nonceGroup = request.hasNonceGroup() ? request.getNonceGroup() : HConstants.NO_NONCE;
// this will contain all the cells that we need to return. It's created later, if needed.
List cellsToReturn = null;
MultiResponse.Builder responseBuilder = MultiResponse.newBuilder();
RegionActionResult.Builder regionActionResultBuilder = RegionActionResult.newBuilder();
Boolean processed = null;
for (RegionAction regionAction : request.getRegionActionList()) {
this.requestCount.add(regionAction.getActionCount());
HRegion region;
regionActionResultBuilder.clear();
try {
region = getRegion(regionAction.getRegion());
} catch (IOException e) {
rpcServer.getMetrics().exception(e);
regionActionResultBuilder.setException(ResponseConverter.buildException(e));
responseBuilder.addRegionActionResult(regionActionResultBuilder.build());
if (cellScanner != null) {
skipCellsForMutations(regionAction.getActionList(), cellScanner);
}
continue; // For this region it's a failure.
}
if (regionAction.hasAtomic() && regionAction.getAtomic()) {
// How does this call happen? It may need some work to play well w/ the surroundings.
// Need to return an item per Action along w/ Action index. TODO.
try {
if (request.hasCondition()) {
Condition condition = request.getCondition();
byte[] row = condition.getRow().toByteArray();
byte[] family = condition.getFamily().toByteArray();
byte[] qualifier = condition.getQualifier().toByteArray();
CompareOp compareOp = CompareOp.valueOf(condition.getCompareType().name());
ByteArrayComparable comparator =
ProtobufUtil.toComparator(condition.getComparator());
processed = checkAndRowMutate(region, regionAction.getActionList(),
cellScanner, row, family, qualifier, compareOp, comparator);
} else {
ClientProtos.RegionLoadStats stats = mutateRows(region, regionAction.getActionList(),
cellScanner);
// add the stats to the request
if (stats != null) {
responseBuilder.addRegionActionResult(RegionActionResult.newBuilder()
.addResultOrException(ResultOrException.newBuilder().setLoadStats(stats)));
}
processed = Boolean.TRUE;
}
} catch (IOException e) {
rpcServer.getMetrics().exception(e);
// As it's atomic, we may expect it's a global failure.
regionActionResultBuilder.setException(ResponseConverter.buildException(e));
}
} else {
// doNonAtomicRegionMutation manages the exception internally
cellsToReturn = doNonAtomicRegionMutation(region, regionAction, cellScanner,
regionActionResultBuilder, cellsToReturn, nonceGroup);
}
responseBuilder.addRegionActionResult(regionActionResultBuilder.build());
}
// Load the controller with the Cells to return.
if (cellsToReturn != null && !cellsToReturn.isEmpty() && controller != null) {
controller.setCellScanner(CellUtil.createCellScanner(cellsToReturn));
}
if (processed != null) responseBuilder.setProcessed(processed);
return responseBuilder.build();
}
private void skipCellsForMutations(List actions, CellScanner cellScanner) {
for (ClientProtos.Action action : actions) {
skipCellsForMutation(action, cellScanner);
}
}
private void skipCellsForMutation(ClientProtos.Action action, CellScanner cellScanner) {
try {
if (action.hasMutation()) {
MutationProto m = action.getMutation();
if (m.hasAssociatedCellCount()) {
for (int i = 0; i < m.getAssociatedCellCount(); i++) {
cellScanner.advance();
}
}
}
} catch (IOException e) {
// No need to handle these Individual Muatation level issue. Any way this entire RegionAction
// marked as failed as we could not see the Region here. At client side the top level
// RegionAction exception will be considered first.
LOG.error("Error while skipping Cells in CellScanner for invalid Region Mutations", e);
}
}
/**
* Run through the regionMutation rm and per Mutation, do the work, and then when
* done, add an instance of a {@link ResultOrException} that corresponds to each Mutation.
* @param region
* @param actions
* @param cellScanner
* @param builder
* @param cellsToReturn Could be null. May be allocated in this method. This is what this
* method returns as a 'result'.
* @return Return the cellScanner passed
*/
private List doNonAtomicRegionMutation(final HRegion region,
final RegionAction actions, final CellScanner cellScanner,
final RegionActionResult.Builder builder, List cellsToReturn, long nonceGroup) {
// Gather up CONTIGUOUS Puts and Deletes in this mutations List. Idea is that rather than do
// one at a time, we instead pass them in batch. Be aware that the corresponding
// ResultOrException instance that matches each Put or Delete is then added down in the
// doBatchOp call. We should be staying aligned though the Put and Delete are deferred/batched
List mutations = null;
for (ClientProtos.Action action: actions.getActionList()) {
ClientProtos.ResultOrException.Builder resultOrExceptionBuilder = null;
try {
Result r = null;
if (action.hasGet()) {
long before = EnvironmentEdgeManager.currentTimeMillis();
try {
Get get = ProtobufUtil.toGet(action.getGet());
r = region.get(get);
} finally {
if (metricsRegionServer != null) {
metricsRegionServer.updateGet(EnvironmentEdgeManager.currentTimeMillis() - before);
}
}
} else if (action.hasServiceCall()) {
resultOrExceptionBuilder = ResultOrException.newBuilder();
try {
Message result = execServiceOnRegion(region, action.getServiceCall());
ClientProtos.CoprocessorServiceResult.Builder serviceResultBuilder =
ClientProtos.CoprocessorServiceResult.newBuilder();
resultOrExceptionBuilder.setServiceResult(
serviceResultBuilder.setValue(
serviceResultBuilder.getValueBuilder()
.setName(result.getClass().getName())
.setValue(result.toByteString())));
} catch (IOException ioe) {
rpcServer.getMetrics().exception(ioe);
resultOrExceptionBuilder.setException(ResponseConverter.buildException(ioe));
}
} else if (action.hasMutation()) {
MutationType type = action.getMutation().getMutateType();
if (type != MutationType.PUT && type != MutationType.DELETE && mutations != null &&
!mutations.isEmpty()) {
// Flush out any Puts or Deletes already collected.
doBatchOp(builder, region, mutations, cellScanner);
mutations.clear();
}
switch (type) {
case APPEND:
r = append(region, action.getMutation(), cellScanner, nonceGroup);
break;
case INCREMENT:
r = increment(region, action.getMutation(), cellScanner, nonceGroup);
break;
case PUT:
case DELETE:
// Collect the individual mutations and apply in a batch
if (mutations == null) {
mutations = new ArrayList(actions.getActionCount());
}
mutations.add(action);
break;
default:
throw new DoNotRetryIOException("Unsupported mutate type: " + type.name());
}
} else {
throw new HBaseIOException("Unexpected Action type");
}
if (r != null) {
ClientProtos.Result pbResult = null;
if (isClientCellBlockSupport()) {
pbResult = ProtobufUtil.toResultNoData(r);
// Hard to guess the size here. Just make a rough guess.
if (cellsToReturn == null) cellsToReturn = new ArrayList();
cellsToReturn.add(r);
} else {
pbResult = ProtobufUtil.toResult(r);
}
resultOrExceptionBuilder =
ClientProtos.ResultOrException.newBuilder().setResult(pbResult);
}
// Could get to here and there was no result and no exception. Presumes we added
// a Put or Delete to the collecting Mutations List for adding later. In this
// case the corresponding ResultOrException instance for the Put or Delete will be added
// down in the doBatchOp method call rather than up here.
} catch (IOException ie) {
rpcServer.getMetrics().exception(ie);
resultOrExceptionBuilder = ResultOrException.newBuilder().
setException(ResponseConverter.buildException(ie));
}
if (resultOrExceptionBuilder != null) {
// Propagate index.
resultOrExceptionBuilder.setIndex(action.getIndex());
builder.addResultOrException(resultOrExceptionBuilder.build());
}
}
// Finish up any outstanding mutations
if (mutations != null && !mutations.isEmpty()) {
doBatchOp(builder, region, mutations, cellScanner);
}
return cellsToReturn;
}
// End Client methods
// Start Admin methods
@Override
@QosPriority(priority=HConstants.HIGH_QOS)
public GetRegionInfoResponse getRegionInfo(final RpcController controller,
final GetRegionInfoRequest request) throws ServiceException {
try {
checkOpen();
requestCount.increment();
HRegion region = getRegion(request.getRegion());
HRegionInfo info = region.getRegionInfo();
GetRegionInfoResponse.Builder builder = GetRegionInfoResponse.newBuilder();
builder.setRegionInfo(HRegionInfo.convert(info));
if (request.hasCompactionState() && request.getCompactionState()) {
builder.setCompactionState(region.getCompactionState());
}
builder.setIsRecovering(region.isRecovering());
return builder.build();
} catch (IOException ie) {
throw new ServiceException(ie);
}
}
@Override
public GetStoreFileResponse getStoreFile(final RpcController controller,
final GetStoreFileRequest request) throws ServiceException {
try {
checkOpen();
HRegion region = getRegion(request.getRegion());
requestCount.increment();
Set columnFamilies;
if (request.getFamilyCount() == 0) {
columnFamilies = region.getStores().keySet();
} else {
columnFamilies = new TreeSet(Bytes.BYTES_RAWCOMPARATOR);
for (ByteString cf: request.getFamilyList()) {
columnFamilies.add(cf.toByteArray());
}
}
int nCF = columnFamilies.size();
List fileList = region.getStoreFileList(
columnFamilies.toArray(new byte[nCF][]));
GetStoreFileResponse.Builder builder = GetStoreFileResponse.newBuilder();
builder.addAllStoreFile(fileList);
return builder.build();
} catch (IOException ie) {
throw new ServiceException(ie);
}
}
@Override
@QosPriority(priority=HConstants.HIGH_QOS)
public GetOnlineRegionResponse getOnlineRegion(final RpcController controller,
final GetOnlineRegionRequest request) throws ServiceException {
try {
checkOpen();
requestCount.increment();
List list = new ArrayList(onlineRegions.size());
for (HRegion region: this.onlineRegions.values()) {
list.add(region.getRegionInfo());
}
Collections.sort(list);
return ResponseConverter.buildGetOnlineRegionResponse(list);
} catch (IOException ie) {
throw new ServiceException(ie);
}
}
// Region open/close direct RPCs
/**
* Open asynchronously a region or a set of regions on the region server.
*
* The opening is coordinated by ZooKeeper, and this method requires the znode to be created
* before being called. As a consequence, this method should be called only from the master.
*
* Different manages states for the region are:
* - region not opened: the region opening will start asynchronously.
* - a close is already in progress: this is considered as an error.
* - an open is already in progress: this new open request will be ignored. This is important
* because the Master can do multiple requests if it crashes.
* - the region is already opened: this new open request will be ignored./li>
*
*
*
* Bulk assign: If there are more than 1 region to open, it will be considered as a bulk assign.
* For a single region opening, errors are sent through a ServiceException. For bulk assign,
* errors are put in the response as FAILED_OPENING.
*
* @param controller the RPC controller
* @param request the request
* @throws ServiceException
*/
@Override
@QosPriority(priority=HConstants.HIGH_QOS)
public OpenRegionResponse openRegion(final RpcController controller,
final OpenRegionRequest request) throws ServiceException {
try {
checkOpen();
} catch (IOException ie) {
throw new ServiceException(ie);
}
requestCount.increment();
if (request.hasServerStartCode() && this.serverNameFromMasterPOV != null) {
// check that we are the same server that this RPC is intended for.
long serverStartCode = request.getServerStartCode();
if (this.serverNameFromMasterPOV.getStartcode() != serverStartCode) {
throw new ServiceException(new DoNotRetryIOException("This RPC was intended for a " +
"different server with startCode: " + serverStartCode + ", this server is: "
+ this.serverNameFromMasterPOV));
}
}
OpenRegionResponse.Builder builder = OpenRegionResponse.newBuilder();
final int regionCount = request.getOpenInfoCount();
final Map htds =
new HashMap(regionCount);
final boolean isBulkAssign = regionCount > 1;
long masterSystemTime = request.hasMasterSystemTime() ? request.getMasterSystemTime() : -1;
for (RegionOpenInfo regionOpenInfo : request.getOpenInfoList()) {
final HRegionInfo region = HRegionInfo.convert(regionOpenInfo.getRegion());
int versionOfOfflineNode = -1;
if (regionOpenInfo.hasVersionOfOfflineNode()) {
versionOfOfflineNode = regionOpenInfo.getVersionOfOfflineNode();
}
HTableDescriptor htd;
try {
final HRegion onlineRegion = getFromOnlineRegions(region.getEncodedName());
if (onlineRegion != null) {
//Check if the region can actually be opened.
if (onlineRegion.getCoprocessorHost() != null) {
onlineRegion.getCoprocessorHost().preOpen();
}
// See HBASE-5094. Cross check with hbase:meta if still this RS is owning
// the region.
Pair p = MetaReader.getRegion(
this.catalogTracker, region.getRegionName());
if (this.getServerName().equals(p.getSecond())) {
Boolean closing = regionsInTransitionInRS.get(region.getEncodedNameAsBytes());
// Map regionsInTransitionInRSOnly has an entry for a region only if the region
// is in transition on this RS, so here closing can be null. If not null, it can
// be true or false. True means the region is opening on this RS; while false
// means the region is closing. Only return ALREADY_OPENED if not closing (i.e.
// not in transition any more, or still transition to open.
if (!Boolean.FALSE.equals(closing)
&& getFromOnlineRegions(region.getEncodedName()) != null) {
LOG.warn("Attempted open of " + region.getEncodedName()
+ " but already online on this server");
builder.addOpeningState(RegionOpeningState.ALREADY_OPENED);
continue;
}
} else {
LOG.warn("The region " + region.getEncodedName() + " is online on this server" +
" but hbase:meta does not have this server - continue opening.");
removeFromOnlineRegions(onlineRegion, null);
}
}
LOG.info("Open " + region.getRegionNameAsString());
htd = htds.get(region.getTable());
if (htd == null) {
htd = this.tableDescriptors.get(region.getTable());
htds.put(region.getTable(), htd);
}
final Boolean previous = this.regionsInTransitionInRS.putIfAbsent(
region.getEncodedNameAsBytes(), Boolean.TRUE);
if (Boolean.FALSE.equals(previous)) {
// There is a close in progress. We need to mark this open as failed in ZK.
OpenRegionHandler.
tryTransitionFromOfflineToFailedOpen(this, region, versionOfOfflineNode);
throw new RegionAlreadyInTransitionException("Received OPEN for the region:" +
region.getRegionNameAsString() + " , which we are already trying to CLOSE ");
}
if (Boolean.TRUE.equals(previous)) {
// An open is in progress. This is supported, but let's log this.
LOG.info("Receiving OPEN for the region:" +
region.getRegionNameAsString() + " , which we are already trying to OPEN" +
" - ignoring this new request for this region.");
}
// We are opening this region. If it moves back and forth for whatever reason, we don't
// want to keep returning the stale moved record while we are opening/if we close again.
removeFromMovedRegions(region.getEncodedName());
if (previous == null) {
// check if the region to be opened is marked in recovering state in ZK
if (SplitLogManager.isRegionMarkedRecoveringInZK(this.zooKeeper,
region.getEncodedName())) {
// check if current region open is for distributedLogReplay. This check is to support
// rolling restart/upgrade where we want to Master/RS see same configuration
if (!regionOpenInfo.hasOpenForDistributedLogReplay()
|| regionOpenInfo.getOpenForDistributedLogReplay()) {
this.recoveringRegions.put(region.getEncodedName(), null);
} else {
// remove stale recovery region from ZK when we open region not for recovering which
// could happen when turn distributedLogReplay off from on.
List tmpRegions = new ArrayList();
tmpRegions.add(region.getEncodedName());
SplitLogManager.deleteRecoveringRegionZNodes(this.zooKeeper, tmpRegions);
}
}
// If there is no action in progress, we can submit a specific handler.
// Need to pass the expected version in the constructor.
if (region.isMetaRegion()) {
this.service.submit(new OpenMetaHandler(this, this, region, htd,
versionOfOfflineNode, masterSystemTime));
} else {
updateRegionFavoredNodesMapping(region.getEncodedName(),
regionOpenInfo.getFavoredNodesList());
this.service.submit(new OpenRegionHandler(this, this, region, htd,
versionOfOfflineNode, masterSystemTime));
}
}
builder.addOpeningState(RegionOpeningState.OPENED);
} catch (KeeperException zooKeeperEx) {
LOG.error("Can't retrieve recovering state from zookeeper", zooKeeperEx);
throw new ServiceException(zooKeeperEx);
} catch (IOException ie) {
LOG.warn("Failed opening region " + region.getRegionNameAsString(), ie);
if (isBulkAssign) {
builder.addOpeningState(RegionOpeningState.FAILED_OPENING);
} else {
throw new ServiceException(ie);
}
}
}
return builder.build();
}
@Override
public void updateRegionFavoredNodesMapping(String encodedRegionName,
List favoredNodes) {
InetSocketAddress[] addr = new InetSocketAddress[favoredNodes.size()];
// Refer to the comment on the declaration of regionFavoredNodesMap on why
// it is a map of region name to InetSocketAddress[]
for (int i = 0; i < favoredNodes.size(); i++) {
addr[i] = InetSocketAddress.createUnresolved(favoredNodes.get(i).getHostName(),
favoredNodes.get(i).getPort());
}
regionFavoredNodesMap.put(encodedRegionName, addr);
}
/**
* Return the favored nodes for a region given its encoded name. Look at the
* comment around {@link #regionFavoredNodesMap} on why it is InetSocketAddress[]
* @param encodedRegionName
* @return array of favored locations
*/
@Override
public InetSocketAddress[] getFavoredNodesForRegion(String encodedRegionName) {
return regionFavoredNodesMap.get(encodedRegionName);
}
/**
* Close a region on the region server.
*
* @param controller the RPC controller
* @param request the request
* @throws ServiceException
*/
@Override
@QosPriority(priority=HConstants.HIGH_QOS)
public CloseRegionResponse closeRegion(final RpcController controller,
final CloseRegionRequest request) throws ServiceException {
int versionOfClosingNode = -1;
if (request.hasVersionOfClosingNode()) {
versionOfClosingNode = request.getVersionOfClosingNode();
}
boolean zk = request.getTransitionInZK();
final ServerName sn = (request.hasDestinationServer() ?
ProtobufUtil.toServerName(request.getDestinationServer()) : null);
try {
checkOpen();
if (request.hasServerStartCode() && this.serverNameFromMasterPOV != null) {
// check that we are the same server that this RPC is intended for.
long serverStartCode = request.getServerStartCode();
if (this.serverNameFromMasterPOV.getStartcode() != serverStartCode) {
throw new ServiceException(new DoNotRetryIOException("This RPC was intended for a " +
"different server with startCode: " + serverStartCode + ", this server is: "
+ this.serverNameFromMasterPOV));
}
}
final String encodedRegionName = ProtobufUtil.getRegionEncodedName(request.getRegion());
// Can be null if we're calling close on a region that's not online
final HRegion region = this.getFromOnlineRegions(encodedRegionName);
if ((region != null) && (region .getCoprocessorHost() != null)) {
region.getCoprocessorHost().preClose(false);
}
requestCount.increment();
LOG.info("Close " + encodedRegionName + ", via zk=" + (zk ? "yes" : "no") +
", znode version=" + versionOfClosingNode + ", on " + sn);
boolean closed = closeRegion(encodedRegionName, false, zk, versionOfClosingNode, sn);
CloseRegionResponse.Builder builder = CloseRegionResponse.newBuilder().setClosed(closed);
return builder.build();
} catch (IOException ie) {
throw new ServiceException(ie);
}
}
/**
* Flush a region on the region server.
*
* @param controller the RPC controller
* @param request the request
* @throws ServiceException
*/
@Override
@QosPriority(priority=HConstants.HIGH_QOS)
public FlushRegionResponse flushRegion(final RpcController controller,
final FlushRegionRequest request) throws ServiceException {
try {
checkOpen();
requestCount.increment();
HRegion region = getRegion(request.getRegion());
LOG.info("Flushing " + region.getRegionNameAsString());
boolean shouldFlush = true;
if (request.hasIfOlderThanTs()) {
shouldFlush = region.getLastFlushTime() < request.getIfOlderThanTs();
}
FlushRegionResponse.Builder builder = FlushRegionResponse.newBuilder();
if (shouldFlush) {
long startTime = EnvironmentEdgeManager.currentTimeMillis();
HRegion.FlushResult flushResult = region.flushcache();
if (flushResult.isFlushSucceeded()) {
long endTime = EnvironmentEdgeManager.currentTimeMillis();
metricsRegionServer.updateFlushTime(endTime - startTime);
}
boolean result = flushResult.isCompactionNeeded();
if (result) {
this.compactSplitThread.requestSystemCompaction(region,
"Compaction through user triggered flush");
}
builder.setFlushed(result);
}
builder.setLastFlushTime(region.getLastFlushTime());
return builder.build();
} catch (DroppedSnapshotException ex) {
// Cache flush can fail in a few places. If it fails in a critical
// section, we get a DroppedSnapshotException and a replay of hlog
// is required. Currently the only way to do this is a restart of
// the server.
abort("Replay of HLog required. Forcing server shutdown", ex);
throw new ServiceException(ex);
} catch (IOException ie) {
throw new ServiceException(ie);
}
}
/**
* Split a region on the region server.
*
* @param controller the RPC controller
* @param request the request
* @throws ServiceException
*/
@Override
@QosPriority(priority=HConstants.HIGH_QOS)
public SplitRegionResponse splitRegion(final RpcController controller,
final SplitRegionRequest request) throws ServiceException {
try {
checkOpen();
requestCount.increment();
HRegion region = getRegion(request.getRegion());
region.startRegionOperation(Operation.SPLIT_REGION);
LOG.info("Splitting " + region.getRegionNameAsString());
long startTime = EnvironmentEdgeManager.currentTimeMillis();
HRegion.FlushResult flushResult = region.flushcache();
if (flushResult.isFlushSucceeded()) {
long endTime = EnvironmentEdgeManager.currentTimeMillis();
metricsRegionServer.updateFlushTime(endTime - startTime);
}
byte[] splitPoint = null;
if (request.hasSplitPoint()) {
splitPoint = request.getSplitPoint().toByteArray();
}
region.forceSplit(splitPoint);
compactSplitThread.requestSplit(region, region.checkSplit(), RpcServer.getRequestUser());
return SplitRegionResponse.newBuilder().build();
} catch (DroppedSnapshotException ex) {
abort("Replay of WAL required. Forcing server shutdown", ex);
throw new ServiceException(ex);
} catch (IOException ie) {
throw new ServiceException(ie);
}
}
/**
* Merge regions on the region server.
*
* @param controller the RPC controller
* @param request the request
* @return merge regions response
* @throws ServiceException
*/
@Override
@QosPriority(priority = HConstants.HIGH_QOS)
public MergeRegionsResponse mergeRegions(final RpcController controller,
final MergeRegionsRequest request) throws ServiceException {
try {
checkOpen();
requestCount.increment();
HRegion regionA = getRegion(request.getRegionA());
HRegion regionB = getRegion(request.getRegionB());
boolean forcible = request.getForcible();
long masterSystemTime = request.hasMasterSystemTime() ? request.getMasterSystemTime() : -1;
regionA.startRegionOperation(Operation.MERGE_REGION);
regionB.startRegionOperation(Operation.MERGE_REGION);
LOG.info("Receiving merging request for " + regionA + ", " + regionB
+ ",forcible=" + forcible);
long startTime = EnvironmentEdgeManager.currentTimeMillis();
HRegion.FlushResult flushResult = regionA.flushcache();
if (flushResult.isFlushSucceeded()) {
long endTime = EnvironmentEdgeManager.currentTimeMillis();
metricsRegionServer.updateFlushTime(endTime - startTime);
}
startTime = EnvironmentEdgeManager.currentTimeMillis();
flushResult = regionB.flushcache();
if (flushResult.isFlushSucceeded()) {
long endTime = EnvironmentEdgeManager.currentTimeMillis();
metricsRegionServer.updateFlushTime(endTime - startTime);
}
compactSplitThread.requestRegionsMerge(regionA, regionB, forcible, masterSystemTime,
RpcServer.getRequestUser());
return MergeRegionsResponse.newBuilder().build();
} catch (DroppedSnapshotException ex) {
abort("Replay of WAL required. Forcing server shutdown", ex);
throw new ServiceException(ex);
} catch (IOException ie) {
throw new ServiceException(ie);
}
}
/**
* Compact a region on the region server.
*
* @param controller the RPC controller
* @param request the request
* @throws ServiceException
*/
@Override
@QosPriority(priority=HConstants.HIGH_QOS)
public CompactRegionResponse compactRegion(final RpcController controller,
final CompactRegionRequest request) throws ServiceException {
try {
checkOpen();
requestCount.increment();
HRegion region = getRegion(request.getRegion());
region.startRegionOperation(Operation.COMPACT_REGION);
LOG.info("Compacting " + region.getRegionNameAsString());
boolean major = false;
byte [] family = null;
Store store = null;
if (request.hasFamily()) {
family = request.getFamily().toByteArray();
store = region.getStore(family);
if (store == null) {
throw new ServiceException(new IOException("column family " + Bytes.toString(family) +
" does not exist in region " + region.getRegionNameAsString()));
}
}
if (request.hasMajor()) {
major = request.getMajor();
}
if (major) {
if (family != null) {
store.triggerMajorCompaction();
} else {
region.triggerMajorCompaction();
}
}
String familyLogMsg = (family != null)?" for column family: " + Bytes.toString(family):"";
LOG.trace("User-triggered compaction requested for region " +
region.getRegionNameAsString() + familyLogMsg);
String log = "User-triggered " + (major ? "major " : "") + "compaction" + familyLogMsg;
if(family != null) {
compactSplitThread.requestCompaction(region, store, log,
Store.PRIORITY_USER, null, RpcServer.getRequestUser());
} else {
compactSplitThread.requestCompaction(region, log,
Store.PRIORITY_USER, null, RpcServer.getRequestUser());
}
return CompactRegionResponse.newBuilder().build();
} catch (IOException ie) {
throw new ServiceException(ie);
}
}
/**
* Replicate WAL entries on the region server.
*
* @param controller the RPC controller
* @param request the request
* @throws ServiceException
*/
@Override
@QosPriority(priority=HConstants.REPLICATION_QOS)
public ReplicateWALEntryResponse replicateWALEntry(final RpcController controller,
final ReplicateWALEntryRequest request)
throws ServiceException {
try {
checkOpen();
if (replicationSinkHandler != null) {
requestCount.increment();
List entries = request.getEntryList();
CellScanner cellScanner = ((PayloadCarryingRpcController)controller).cellScanner();
rsHost.preReplicateLogEntries(entries, cellScanner);
replicationSinkHandler.replicateLogEntries(entries, cellScanner);
rsHost.postReplicateLogEntries(entries, cellScanner);
return ReplicateWALEntryResponse.newBuilder().build();
} else {
throw new ServiceException("Replication services are not initialized yet");
}
} catch (IOException ie) {
throw new ServiceException(ie);
}
}
/**
* Replay the given changes when distributedLogReplay WAL edits from a failed RS. The guarantee is
* that the given mutations will be durable on the receiving RS if this method returns without any
* exception.
* @param controller the RPC controller
* @param request the request
* @throws ServiceException
*/
@Override
@QosPriority(priority = HConstants.REPLAY_QOS)
public ReplicateWALEntryResponse replay(final RpcController controller,
final ReplicateWALEntryRequest request) throws ServiceException {
long before = EnvironmentEdgeManager.currentTimeMillis();
CellScanner cells = ((PayloadCarryingRpcController) controller).cellScanner();
try {
checkOpen();
List entries = request.getEntryList();
if (entries == null || entries.isEmpty()) {
// empty input
return ReplicateWALEntryResponse.newBuilder().build();
}
HRegion region = this.getRegionByEncodedName(
entries.get(0).getKey().getEncodedRegionName().toStringUtf8());
RegionCoprocessorHost coprocessorHost = region.getCoprocessorHost();
List> walEntries = new ArrayList>();
List mutations = new ArrayList();
// when tag is enabled, we need tag replay edits with log sequence number
boolean needAddReplayTag = (HFile.getFormatVersion(this.conf) >= 3);
for (WALEntry entry : entries) {
if (nonceManager != null) {
long nonceGroup = entry.getKey().hasNonceGroup()
? entry.getKey().getNonceGroup() : HConstants.NO_NONCE;
long nonce = entry.getKey().hasNonce() ? entry.getKey().getNonce() : HConstants.NO_NONCE;
nonceManager.reportOperationFromWal(nonceGroup, nonce, entry.getKey().getWriteTime());
}
Pair walEntry = (coprocessorHost == null) ? null :
new Pair();
List edits = HLogSplitter.getMutationsFromWALEntry(entry,
cells, walEntry, needAddReplayTag);
if (coprocessorHost != null) {
// Start coprocessor replay here. The coprocessor is for each WALEdit instead of a
// KeyValue.
if (coprocessorHost.preWALRestore(region.getRegionInfo(), walEntry.getFirst(),
walEntry.getSecond())) {
// if bypass this log entry, ignore it ...
continue;
}
walEntries.add(walEntry);
}
mutations.addAll(edits);
}
if (!mutations.isEmpty()) {
OperationStatus[] result = doReplayBatchOp(region, mutations);
// check if it's a partial success
for (int i = 0; result != null && i < result.length; i++) {
if (result[i] != OperationStatus.SUCCESS) {
throw new IOException(result[i].getExceptionMsg());
}
}
}
if (coprocessorHost != null) {
for (Pair wal : walEntries) {
coprocessorHost.postWALRestore(region.getRegionInfo(), wal.getFirst(),
wal.getSecond());
}
}
return ReplicateWALEntryResponse.newBuilder().build();
} catch (IOException ie) {
throw new ServiceException(ie);
} finally {
metricsRegionServer.updateReplay(EnvironmentEdgeManager.currentTimeMillis() - before);
}
}
/**
* Roll the WAL writer of the region server.
* @param controller the RPC controller
* @param request the request
* @throws ServiceException
*/
@Override
public RollWALWriterResponse rollWALWriter(final RpcController controller,
final RollWALWriterRequest request) throws ServiceException {
try {
checkOpen();
requestCount.increment();
if (this.rsHost != null) {
this.rsHost.preRollWALWriterRequest();
}
HLog wal = this.getWAL();
byte[][] regionsToFlush = wal.rollWriter(true);
RollWALWriterResponse.Builder builder = RollWALWriterResponse.newBuilder();
if (regionsToFlush != null) {
for (byte[] region: regionsToFlush) {
builder.addRegionToFlush(ByteStringer.wrap(region));
}
}
return builder.build();
} catch (IOException ie) {
throw new ServiceException(ie);
}
}
/**
* Stop the region server.
*
* @param controller the RPC controller
* @param request the request
* @throws ServiceException
*/
@Override
public StopServerResponse stopServer(final RpcController controller,
final StopServerRequest request) throws ServiceException {
requestCount.increment();
String reason = request.getReason();
stop(reason);
return StopServerResponse.newBuilder().build();
}
/**
* Get some information of the region server.
*
* @param controller the RPC controller
* @param request the request
* @throws ServiceException
*/
@Override
public GetServerInfoResponse getServerInfo(final RpcController controller,
final GetServerInfoRequest request) throws ServiceException {
try {
checkOpen();
} catch (IOException ie) {
throw new ServiceException(ie);
}
ServerName serverName = getServerName();
requestCount.increment();
return ResponseConverter.buildGetServerInfoResponse(serverName, rsInfo.getInfoPort());
}
// End Admin methods
/**
* Find the HRegion based on a region specifier
*
* @param regionSpecifier the region specifier
* @return the corresponding region
* @throws IOException if the specifier is not null,
* but failed to find the region
*/
protected HRegion getRegion(
final RegionSpecifier regionSpecifier) throws IOException {
ByteString value = regionSpecifier.getValue();
RegionSpecifierType type = regionSpecifier.getType();
switch (type) {
case REGION_NAME:
byte[] regionName = value.toByteArray();
String encodedRegionName = HRegionInfo.encodeRegionName(regionName);
return getRegionByEncodedName(regionName, encodedRegionName);
case ENCODED_REGION_NAME:
return getRegionByEncodedName(value.toStringUtf8());
default:
throw new DoNotRetryIOException(
"Unsupported region specifier type: " + type);
}
}
/**
* Execute an append mutation.
*
* @param region
* @param m
* @param cellScanner
* @return result to return to client if default operation should be
* bypassed as indicated by RegionObserver, null otherwise
* @throws IOException
*/
protected Result append(final HRegion region,
final MutationProto m, final CellScanner cellScanner, long nonceGroup) throws IOException {
long before = EnvironmentEdgeManager.currentTimeMillis();
Append append = ProtobufUtil.toAppend(m, cellScanner);
Result r = null;
if (region.getCoprocessorHost() != null) {
r = region.getCoprocessorHost().preAppend(append);
}
if (r == null) {
long nonce = startNonceOperation(m, nonceGroup);
boolean success = false;
try {
r = region.append(append, nonceGroup, nonce);
success = true;
} finally {
endNonceOperation(m, nonceGroup, success);
}
if (region.getCoprocessorHost() != null) {
region.getCoprocessorHost().postAppend(append, r);
}
}
metricsRegionServer.updateAppend(EnvironmentEdgeManager.currentTimeMillis() - before);
return r;
}
/**
* Execute an increment mutation.
*
* @param region
* @param mutation
* @return the Result
* @throws IOException
*/
protected Result increment(final HRegion region, final MutationProto mutation,
final CellScanner cells, long nonceGroup) throws IOException {
long before = EnvironmentEdgeManager.currentTimeMillis();
Increment increment = ProtobufUtil.toIncrement(mutation, cells);
Result r = null;
if (region.getCoprocessorHost() != null) {
r = region.getCoprocessorHost().preIncrement(increment);
}
if (r == null) {
long nonce = startNonceOperation(mutation, nonceGroup);
boolean success = false;
try {
r = region.increment(increment, nonceGroup, nonce);
success = true;
} finally {
endNonceOperation(mutation, nonceGroup, success);
}
if (region.getCoprocessorHost() != null) {
r = region.getCoprocessorHost().postIncrement(increment, r);
}
}
metricsRegionServer.updateIncrement(EnvironmentEdgeManager.currentTimeMillis() - before);
return r;
}
/**
* Starts the nonce operation for a mutation, if needed.
* @param mutation Mutation.
* @param nonceGroup Nonce group from the request.
* @returns Nonce used (can be NO_NONCE).
*/
private long startNonceOperation(final MutationProto mutation, long nonceGroup)
throws IOException, OperationConflictException {
if (nonceManager == null || !mutation.hasNonce()) return HConstants.NO_NONCE;
boolean canProceed = false;
try {
canProceed = nonceManager.startOperation(nonceGroup, mutation.getNonce(), this);
} catch (InterruptedException ex) {
throw new InterruptedIOException("Nonce start operation interrupted");
}
if (!canProceed) {
// TODO: instead, we could convert append/increment to get w/mvcc
String message = "The operation with nonce {" + nonceGroup + ", " + mutation.getNonce()
+ "} on row [" + Bytes.toString(mutation.getRow().toByteArray())
+ "] may have already completed";
throw new OperationConflictException(message);
}
return mutation.getNonce();
}
/**
* Ends nonce operation for a mutation, if needed.
* @param mutation Mutation.
* @param nonceGroup Nonce group from the request. Always 0 in initial implementation.
* @param success Whether the operation for this nonce has succeeded.
*/
private void endNonceOperation(final MutationProto mutation, long nonceGroup,
boolean success) {
if (nonceManager == null || !mutation.hasNonce()) return;
nonceManager.endOperation(nonceGroup, mutation.getNonce(), success);
}
@Override
public ServerNonceManager getNonceManager() {
return this.nonceManager;
}
/**
* Execute a list of Put/Delete mutations.
*
* @param builder
* @param region
* @param mutations
*/
protected void doBatchOp(final RegionActionResult.Builder builder, final HRegion region,
final List mutations, final CellScanner cells) {
Mutation[] mArray = new Mutation[mutations.size()];
long before = EnvironmentEdgeManager.currentTimeMillis();
boolean batchContainsPuts = false, batchContainsDelete = false;
try {
int i = 0;
for (ClientProtos.Action action: mutations) {
MutationProto m = action.getMutation();
Mutation mutation;
if (m.getMutateType() == MutationType.PUT) {
mutation = ProtobufUtil.toPut(m, cells);
batchContainsPuts = true;
} else {
mutation = ProtobufUtil.toDelete(m, cells);
batchContainsDelete = true;
}
mArray[i++] = mutation;
}
if (!region.getRegionInfo().isMetaTable()) {
cacheFlusher.reclaimMemStoreMemory();
}
OperationStatus codes[] = region.batchMutate(mArray);
for (i = 0; i < codes.length; i++) {
int index = mutations.get(i).getIndex();
Exception e = null;
switch (codes[i].getOperationStatusCode()) {
case BAD_FAMILY:
e = new NoSuchColumnFamilyException(codes[i].getExceptionMsg());
builder.addResultOrException(getResultOrException(e, index));
break;
case SANITY_CHECK_FAILURE:
e = new FailedSanityCheckException(codes[i].getExceptionMsg());
builder.addResultOrException(getResultOrException(e, index));
break;
default:
e = new DoNotRetryIOException(codes[i].getExceptionMsg());
builder.addResultOrException(getResultOrException(e, index));
break;
case SUCCESS:
builder.addResultOrException(getResultOrException(
ClientProtos.Result.getDefaultInstance(), index, region.getRegionStats()));
break;
}
}
} catch (IOException ie) {
for (int i = 0; i < mutations.size(); i++) {
builder.addResultOrException(getResultOrException(ie, mutations.get(i).getIndex()));
}
}
long after = EnvironmentEdgeManager.currentTimeMillis();
if (batchContainsPuts) {
metricsRegionServer.updatePut(after - before);
}
if (batchContainsDelete) {
metricsRegionServer.updateDelete(after - before);
}
}
private static ResultOrException getResultOrException(final ClientProtos.Result r,
final int index, final ClientProtos.RegionLoadStats stats) {
return getResultOrException(ResponseConverter.buildActionResult(r, stats), index);
}
private static ResultOrException getResultOrException(final Exception e, final int index) {
return getResultOrException(ResponseConverter.buildActionResult(e), index);
}
private static ResultOrException getResultOrException(final ResultOrException.Builder builder,
final int index) {
return builder.setIndex(index).build();
}
/**
* Execute a list of Put/Delete mutations. The function returns OperationStatus instead of
* constructing MultiResponse to save a possible loop if caller doesn't need MultiResponse.
* @param region
* @param mutations
* @return an array of OperationStatus which internally contains the OperationStatusCode and the
* exceptionMessage if any
* @throws IOException
*/
protected OperationStatus [] doReplayBatchOp(final HRegion region,
final List mutations) throws IOException {
long before = EnvironmentEdgeManager.currentTimeMillis();
boolean batchContainsPuts = false, batchContainsDelete = false;
try {
for (Iterator it = mutations.iterator(); it.hasNext();) {
HLogSplitter.MutationReplay m = it.next();
if (m.type == MutationType.PUT) {
batchContainsPuts = true;
} else {
batchContainsDelete = true;
}
NavigableMap> map = m.mutation.getFamilyCellMap();
List metaCells = map.get(WALEdit.METAFAMILY);
if (metaCells != null && !metaCells.isEmpty()) {
for (Cell metaCell : metaCells) {
CompactionDescriptor compactionDesc = WALEdit.getCompaction(metaCell);
if (compactionDesc != null) {
region.completeCompactionMarker(compactionDesc);
}
}
it.remove();
}
}
requestCount.add(mutations.size());
if (!region.getRegionInfo().isMetaTable()) {
cacheFlusher.reclaimMemStoreMemory();
}
return region.batchReplay(mutations.toArray(
new HLogSplitter.MutationReplay[mutations.size()]));
} finally {
long after = EnvironmentEdgeManager.currentTimeMillis();
if (batchContainsPuts) {
metricsRegionServer.updatePut(after - before);
}
if (batchContainsDelete) {
metricsRegionServer.updateDelete(after - before);
}
}
}
/**
* Mutate a list of rows atomically.
*
* @param region
* @param actions
* @param cellScanner if non-null, the mutation data -- the Cell content.
* @throws IOException
*/
protected ClientProtos.RegionLoadStats mutateRows(final HRegion region,
final List actions, final CellScanner cellScanner)
throws IOException {
if (!region.getRegionInfo().isMetaTable()) {
cacheFlusher.reclaimMemStoreMemory();
}
RowMutations rm = null;
for (ClientProtos.Action action: actions) {
if (action.hasGet()) {
throw new DoNotRetryIOException("Atomic put and/or delete only, not a Get=" +
action.getGet());
}
MutationType type = action.getMutation().getMutateType();
if (rm == null) {
rm = new RowMutations(action.getMutation().getRow().toByteArray());
}
switch (type) {
case PUT:
rm.add(ProtobufUtil.toPut(action.getMutation(), cellScanner));
break;
case DELETE:
rm.add(ProtobufUtil.toDelete(action.getMutation(), cellScanner));
break;
default:
throw new DoNotRetryIOException("Atomic put and/or delete only, not " + type.name());
}
}
region.mutateRow(rm);
return region.getRegionStats();
}
/**
* Mutate a list of rows atomically.
*
* @param region
* @param actions
* @param cellScanner if non-null, the mutation data -- the Cell content.
* @param row
* @param family
* @param qualifier
* @param compareOp
* @param comparator
* @throws IOException
*/
private boolean checkAndRowMutate(final HRegion region, final List actions,
final CellScanner cellScanner, byte[] row, byte[] family, byte[] qualifier,
CompareOp compareOp, ByteArrayComparable comparator) throws IOException {
if (!region.getRegionInfo().isMetaTable()) {
cacheFlusher.reclaimMemStoreMemory();
}
RowMutations rm = null;
for (ClientProtos.Action action: actions) {
if (action.hasGet()) {
throw new DoNotRetryIOException("Atomic put and/or delete only, not a Get=" +
action.getGet());
}
MutationType type = action.getMutation().getMutateType();
if (rm == null) {
rm = new RowMutations(action.getMutation().getRow().toByteArray());
}
switch (type) {
case PUT:
rm.add(ProtobufUtil.toPut(action.getMutation(), cellScanner));
break;
case DELETE:
rm.add(ProtobufUtil.toDelete(action.getMutation(), cellScanner));
break;
default:
throw new DoNotRetryIOException("Atomic put and/or delete only, not " + type.name());
}
}
return region.checkAndRowMutate(row, family, qualifier, compareOp, comparator, rm, Boolean.TRUE);
}
private static class MovedRegionInfo {
private final ServerName serverName;
private final long seqNum;
private final long ts;
public MovedRegionInfo(ServerName serverName, long closeSeqNum) {
this.serverName = serverName;
this.seqNum = closeSeqNum;
ts = EnvironmentEdgeManager.currentTimeMillis();
}
public ServerName getServerName() {
return serverName;
}
public long getSeqNum() {
return seqNum;
}
public long getMoveTime() {
return ts;
}
}
// This map will contains all the regions that we closed for a move.
// We add the time it was moved as we don't want to keep too old information
protected Map movedRegions =
new ConcurrentHashMap(3000);
// We need a timeout. If not there is a risk of giving a wrong information: this would double
// the number of network calls instead of reducing them.
private static final int TIMEOUT_REGION_MOVED = (2 * 60 * 1000);
protected void addToMovedRegions(String encodedName, ServerName destination, long closeSeqNum) {
if (ServerName.isSameHostnameAndPort(destination, this.getServerName())) {
LOG.warn("Not adding moved region record: " + encodedName + " to self.");
return;
}
LOG.info("Adding moved region record: " + encodedName + " to "
+ destination.getServerName() + ":" + destination.getPort()
+ " as of " + closeSeqNum);
movedRegions.put(encodedName, new MovedRegionInfo(destination, closeSeqNum));
}
private void removeFromMovedRegions(String encodedName) {
movedRegions.remove(encodedName);
}
private MovedRegionInfo getMovedRegion(final String encodedRegionName) {
MovedRegionInfo dest = movedRegions.get(encodedRegionName);
long now = EnvironmentEdgeManager.currentTimeMillis();
if (dest != null) {
if (dest.getMoveTime() > (now - TIMEOUT_REGION_MOVED)) {
return dest;
} else {
movedRegions.remove(encodedRegionName);
}
}
return null;
}
/**
* Remove the expired entries from the moved regions list.
*/
protected void cleanMovedRegions() {
final long cutOff = System.currentTimeMillis() - TIMEOUT_REGION_MOVED;
Iterator> it = movedRegions.entrySet().iterator();
while (it.hasNext()){
Map.Entry e = it.next();
if (e.getValue().getMoveTime() < cutOff) {
it.remove();
}
}
}
/**
* Creates a Chore thread to clean the moved region cache.
*/
protected static class MovedRegionsCleaner extends Chore implements Stoppable {
private HRegionServer regionServer;
Stoppable stoppable;
private MovedRegionsCleaner(
HRegionServer regionServer, Stoppable stoppable){
super("MovedRegionsCleaner for region "+regionServer, TIMEOUT_REGION_MOVED, stoppable);
this.regionServer = regionServer;
this.stoppable = stoppable;
}
static MovedRegionsCleaner createAndStart(HRegionServer rs){
Stoppable stoppable = new Stoppable() {
private volatile boolean isStopped = false;
@Override public void stop(String why) { isStopped = true;}
@Override public boolean isStopped() {return isStopped;}
};
return new MovedRegionsCleaner(rs, stoppable);
}
@Override
protected void chore() {
regionServer.cleanMovedRegions();
}
@Override
public void stop(String why) {
stoppable.stop(why);
}
@Override
public boolean isStopped() {
return stoppable.isStopped();
}
}
private String getMyEphemeralNodePath() {
return ZKUtil.joinZNode(this.zooKeeper.rsZNode, getServerName().toString());
}
/**
* Holder class which holds the RegionScanner and nextCallSeq together.
*/
private static class RegionScannerHolder {
private AtomicLong nextCallSeq = new AtomicLong(0);
private RegionScanner s;
private HRegion r;
public RegionScannerHolder(RegionScanner s, HRegion r) {
this.s = s;
this.r = r;
}
private long getNextCallSeq() {
return nextCallSeq.get();
}
private void incNextCallSeq() {
nextCallSeq.incrementAndGet();
}
private void rollbackNextCallSeq() {
nextCallSeq.decrementAndGet();
}
}
private boolean isHealthCheckerConfigured() {
String healthScriptLocation = this.conf.get(HConstants.HEALTH_SCRIPT_LOC);
return org.apache.commons.lang.StringUtils.isNotBlank(healthScriptLocation);
}
/**
* @return the underlying {@link CompactSplitThread} for the servers
*/
public CompactSplitThread getCompactSplitThread() {
return this.compactSplitThread;
}
/**
* A helper function to store the last flushed sequence Id with the previous failed RS for a
* recovering region. The Id is used to skip wal edits which are flushed. Since the flushed
* sequence id is only valid for each RS, we associate the Id with corresponding failed RS.
* @throws KeeperException
* @throws IOException
*/
private void updateRecoveringRegionLastFlushedSequenceId(HRegion r) throws KeeperException,
IOException {
if (!r.isRecovering()) {
// return immdiately for non-recovering regions
return;
}
HRegionInfo region = r.getRegionInfo();
ZooKeeperWatcher zkw = getZooKeeper();
String previousRSName = this.getLastFailedRSFromZK(region.getEncodedName());
Map maxSeqIdInStores = r.getMaxStoreSeqIdForLogReplay();
long minSeqIdForLogReplay = -1;
for (Long storeSeqIdForReplay : maxSeqIdInStores.values()) {
if (minSeqIdForLogReplay == -1 || storeSeqIdForReplay < minSeqIdForLogReplay) {
minSeqIdForLogReplay = storeSeqIdForReplay;
}
}
try {
long lastRecordedFlushedSequenceId = -1;
String nodePath = ZKUtil.joinZNode(this.zooKeeper.recoveringRegionsZNode,
region.getEncodedName());
// recovering-region level
byte[] data = ZKUtil.getData(zkw, nodePath);
if (data != null) {
lastRecordedFlushedSequenceId = SplitLogManager.parseLastFlushedSequenceIdFrom(data);
}
if (data == null || lastRecordedFlushedSequenceId < minSeqIdForLogReplay) {
ZKUtil.setData(zkw, nodePath, ZKUtil.positionToByteArray(minSeqIdForLogReplay));
}
if (previousRSName != null) {
// one level deeper for the failed RS
nodePath = ZKUtil.joinZNode(nodePath, previousRSName);
ZKUtil.setData(zkw, nodePath,
ZKUtil.regionSequenceIdsToByteArray(minSeqIdForLogReplay, maxSeqIdInStores));
LOG.debug("Update last flushed sequence id of region " + region.getEncodedName() + " for "
+ previousRSName);
} else {
LOG.warn("Can't find failed region server for recovering region " + region.getEncodedName());
}
} catch (NoNodeException ignore) {
LOG.debug("Region " + region.getEncodedName() +
" must have completed recovery because its recovery znode has been removed", ignore);
}
}
/**
* Return the last failed RS name under /hbase/recovering-regions/encodedRegionName
* @param encodedRegionName
* @throws KeeperException
*/
private String getLastFailedRSFromZK(String encodedRegionName) throws KeeperException {
String result = null;
long maxZxid = 0;
ZooKeeperWatcher zkw = this.getZooKeeper();
String nodePath = ZKUtil.joinZNode(zkw.recoveringRegionsZNode, encodedRegionName);
List failedServers = ZKUtil.listChildrenNoWatch(zkw, nodePath);
if (failedServers == null || failedServers.isEmpty()) {
return result;
}
for (String failedServer : failedServers) {
String rsPath = ZKUtil.joinZNode(nodePath, failedServer);
Stat stat = new Stat();
ZKUtil.getDataNoWatch(zkw, rsPath, stat);
if (maxZxid < stat.getCzxid()) {
maxZxid = stat.getCzxid();
result = failedServer;
}
}
return result;
}
@Override
public UpdateFavoredNodesResponse updateFavoredNodes(RpcController controller,
UpdateFavoredNodesRequest request) throws ServiceException {
List openInfoList = request.getUpdateInfoList();
UpdateFavoredNodesResponse.Builder respBuilder = UpdateFavoredNodesResponse.newBuilder();
for (UpdateFavoredNodesRequest.RegionUpdateInfo regionUpdateInfo : openInfoList) {
HRegionInfo hri = HRegionInfo.convert(regionUpdateInfo.getRegion());
updateRegionFavoredNodesMapping(hri.getEncodedName(),
regionUpdateInfo.getFavoredNodesList());
}
respBuilder.setResponse(openInfoList.size());
return respBuilder.build();
}
/**
* @return The cache config instance used by the regionserver.
*/
public CacheConfig getCacheConfig() {
return this.cacheConfig;
}
@Override
public HeapMemoryManager getHeapMemoryManager() {
return hMemManager;
}
@Override
public double getCompactionPressure() {
double max = 0;
for (HRegion region : onlineRegions.values()) {
for (Store store : region.getStores().values()) {
double normCount = store.getCompactionPressure();
if (normCount > max) {
max = normCount;
}
}
}
return max;
}
}
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