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/*
* 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.util;
import java.io.Closeable;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InterruptedIOException;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.net.InetAddress;
import java.net.URI;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Comparator;
import java.util.EnumSet;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Objects;
import java.util.Optional;
import java.util.Set;
import java.util.SortedMap;
import java.util.TreeMap;
import java.util.Vector;
import java.util.concurrent.Callable;
import java.util.concurrent.ConcurrentSkipListMap;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.concurrent.FutureTask;
import java.util.concurrent.ScheduledThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;
import org.apache.commons.io.IOUtils;
import org.apache.commons.lang3.StringUtils;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.conf.Configured;
import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.permission.FsAction;
import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.hbase.Abortable;
import org.apache.hadoop.hbase.Cell;
import org.apache.hadoop.hbase.CellUtil;
import org.apache.hadoop.hbase.ClusterMetrics;
import org.apache.hadoop.hbase.ClusterMetrics.Option;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.HBaseInterfaceAudience;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.HRegionLocation;
import org.apache.hadoop.hbase.KeyValue;
import org.apache.hadoop.hbase.MasterNotRunningException;
import org.apache.hadoop.hbase.MetaTableAccessor;
import org.apache.hadoop.hbase.RegionLocations;
import org.apache.hadoop.hbase.ServerName;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.TableNotFoundException;
import org.apache.hadoop.hbase.ZooKeeperConnectionException;
import org.apache.hadoop.hbase.client.Admin;
import org.apache.hadoop.hbase.client.ClusterConnection;
import org.apache.hadoop.hbase.client.ColumnFamilyDescriptor;
import org.apache.hadoop.hbase.client.ColumnFamilyDescriptorBuilder;
import org.apache.hadoop.hbase.client.Connection;
import org.apache.hadoop.hbase.client.ConnectionFactory;
import org.apache.hadoop.hbase.client.Delete;
import org.apache.hadoop.hbase.client.Get;
import org.apache.hadoop.hbase.client.Put;
import org.apache.hadoop.hbase.client.RegionInfo;
import org.apache.hadoop.hbase.client.RegionInfoBuilder;
import org.apache.hadoop.hbase.client.RegionReplicaUtil;
import org.apache.hadoop.hbase.client.Result;
import org.apache.hadoop.hbase.client.ResultScanner;
import org.apache.hadoop.hbase.client.RowMutations;
import org.apache.hadoop.hbase.client.Scan;
import org.apache.hadoop.hbase.client.Table;
import org.apache.hadoop.hbase.client.TableDescriptor;
import org.apache.hadoop.hbase.client.TableDescriptorBuilder;
import org.apache.hadoop.hbase.client.TableState;
import org.apache.hadoop.hbase.io.FileLink;
import org.apache.hadoop.hbase.io.HFileLink;
import org.apache.hadoop.hbase.io.hfile.CacheConfig;
import org.apache.hadoop.hbase.io.hfile.HFile;
import org.apache.hadoop.hbase.master.RegionState;
import org.apache.hadoop.hbase.regionserver.HRegion;
import org.apache.hadoop.hbase.regionserver.HRegionFileSystem;
import org.apache.hadoop.hbase.regionserver.StoreFileInfo;
import org.apache.hadoop.hbase.replication.ReplicationException;
import org.apache.hadoop.hbase.replication.ReplicationPeerDescription;
import org.apache.hadoop.hbase.replication.ReplicationQueueStorage;
import org.apache.hadoop.hbase.replication.ReplicationStorageFactory;
import org.apache.hadoop.hbase.security.UserProvider;
import org.apache.hadoop.hbase.util.Bytes.ByteArrayComparator;
import org.apache.hadoop.hbase.util.HbckErrorReporter.ERROR_CODE;
import org.apache.hadoop.hbase.util.hbck.HFileCorruptionChecker;
import org.apache.hadoop.hbase.util.hbck.ReplicationChecker;
import org.apache.hadoop.hbase.util.hbck.TableIntegrityErrorHandler;
import org.apache.hadoop.hbase.wal.WALSplitUtil;
import org.apache.hadoop.hbase.zookeeper.ZKUtil;
import org.apache.hadoop.hbase.zookeeper.ZKWatcher;
import org.apache.hadoop.hbase.zookeeper.ZNodePaths;
import org.apache.hadoop.hdfs.protocol.AlreadyBeingCreatedException;
import org.apache.hadoop.ipc.RemoteException;
import org.apache.hadoop.security.AccessControlException;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.hadoop.util.ReflectionUtils;
import org.apache.hadoop.util.Tool;
import org.apache.hadoop.util.ToolRunner;
import org.apache.yetus.audience.InterfaceAudience;
import org.apache.yetus.audience.InterfaceStability;
import org.apache.zookeeper.KeeperException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.hbase.thirdparty.com.google.common.annotations.VisibleForTesting;
import org.apache.hbase.thirdparty.com.google.common.base.Joiner;
import org.apache.hbase.thirdparty.com.google.common.base.Preconditions;
import org.apache.hbase.thirdparty.com.google.common.collect.Lists;
import org.apache.hbase.thirdparty.com.google.common.collect.Sets;
import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil;
import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.AdminService.BlockingInterface;
/**
* HBaseFsck (hbck) is a tool for checking and repairing region consistency and
* table integrity problems in a corrupted HBase. This tool was written for hbase-1.x. It does not
* work with hbase-2.x; it can read state but is not allowed to change state; i.e. effect 'repair'.
* Even though it can 'read' state, given how so much has changed in how hbase1 and hbase2 operate,
* it will often misread. See hbck2 (HBASE-19121) for a hbck tool for hbase2. This class is
* deprecated.
*
*
* Region consistency checks verify that hbase:meta, region deployment on region
* servers and the state of data in HDFS (.regioninfo files) all are in
* accordance.
*
* Table integrity checks verify that all possible row keys resolve to exactly
* one region of a table. This means there are no individual degenerate
* or backwards regions; no holes between regions; and that there are no
* overlapping regions.
*
* The general repair strategy works in two phases:
*
* - Repair Table Integrity on HDFS. (merge or fabricate regions)
*
- Repair Region Consistency with hbase:meta and assignments
*
*
* For table integrity repairs, the tables' region directories are scanned
* for .regioninfo files. Each table's integrity is then verified. If there
* are any orphan regions (regions with no .regioninfo files) or holes, new
* regions are fabricated. Backwards regions are sidelined as well as empty
* degenerate (endkey==startkey) regions. If there are any overlapping regions,
* a new region is created and all data is merged into the new region.
*
* Table integrity repairs deal solely with HDFS and could potentially be done
* offline -- the hbase region servers or master do not need to be running.
* This phase can eventually be used to completely reconstruct the hbase:meta table in
* an offline fashion.
*
* Region consistency requires three conditions -- 1) valid .regioninfo file
* present in an HDFS region dir, 2) valid row with .regioninfo data in META,
* and 3) a region is deployed only at the regionserver that was assigned to
* with proper state in the master.
*
* Region consistency repairs require hbase to be online so that hbck can
* contact the HBase master and region servers. The hbck#connect() method must
* first be called successfully. Much of the region consistency information
* is transient and less risky to repair.
*
* If hbck is run from the command line, there are a handful of arguments that
* can be used to limit the kinds of repairs hbck will do. See the code in
* {@link #printUsageAndExit()} for more details.
* @deprecated For removal in hbase-4.0.0. Use HBCK2 instead.
*/
@Deprecated
@InterfaceAudience.LimitedPrivate(HBaseInterfaceAudience.TOOLS)
@InterfaceStability.Evolving
public class HBaseFsck extends Configured implements Closeable {
public static final long DEFAULT_TIME_LAG = 60000; // default value of 1 minute
public static final long DEFAULT_SLEEP_BEFORE_RERUN = 10000;
private static final int MAX_NUM_THREADS = 50; // #threads to contact regions
private static boolean rsSupportsOffline = true;
private static final int DEFAULT_OVERLAPS_TO_SIDELINE = 2;
private static final int DEFAULT_MAX_MERGE = 5;
/**
* Here is where hbase-1.x used to default the lock for hbck1.
* It puts in place a lock when it goes to write/make changes.
*/
@VisibleForTesting
public static final String HBCK_LOCK_FILE = "hbase-hbck.lock";
private static final int DEFAULT_MAX_LOCK_FILE_ATTEMPTS = 5;
private static final int DEFAULT_LOCK_FILE_ATTEMPT_SLEEP_INTERVAL = 200; // milliseconds
private static final int DEFAULT_LOCK_FILE_ATTEMPT_MAX_SLEEP_TIME = 5000; // milliseconds
// We have to set the timeout value > HdfsConstants.LEASE_SOFTLIMIT_PERIOD.
// In HADOOP-2.6 and later, the Namenode proxy now created with custom RetryPolicy for
// AlreadyBeingCreatedException which is implies timeout on this operations up to
// HdfsConstants.LEASE_SOFTLIMIT_PERIOD (60 seconds).
private static final int DEFAULT_WAIT_FOR_LOCK_TIMEOUT = 80; // seconds
private static final int DEFAULT_MAX_CREATE_ZNODE_ATTEMPTS = 5;
private static final int DEFAULT_CREATE_ZNODE_ATTEMPT_SLEEP_INTERVAL = 200; // milliseconds
private static final int DEFAULT_CREATE_ZNODE_ATTEMPT_MAX_SLEEP_TIME = 5000; // milliseconds
/**********************
* Internal resources
**********************/
private static final Logger LOG = LoggerFactory.getLogger(HBaseFsck.class.getName());
private ClusterMetrics status;
private ClusterConnection connection;
private Admin admin;
private Table meta;
// threads to do ||izable tasks: retrieve data from regionservers, handle overlapping regions
protected ExecutorService executor;
private long startMillis = EnvironmentEdgeManager.currentTime();
private HFileCorruptionChecker hfcc;
private int retcode = 0;
private Path HBCK_LOCK_PATH;
private FSDataOutputStream hbckOutFd;
// This lock is to prevent cleanup of balancer resources twice between
// ShutdownHook and the main code. We cleanup only if the connect() is
// successful
private final AtomicBoolean hbckLockCleanup = new AtomicBoolean(false);
// Unsupported options in HBase 2.0+
private static final Set unsupportedOptionsInV2 = Sets.newHashSet("-fix",
"-fixAssignments", "-fixMeta", "-fixHdfsHoles", "-fixHdfsOrphans", "-fixTableOrphans",
"-fixHdfsOverlaps", "-sidelineBigOverlaps", "-fixSplitParents", "-removeParents",
"-fixEmptyMetaCells", "-repair", "-repairHoles", "-maxOverlapsToSideline", "-maxMerge");
/***********
* Options
***********/
private static boolean details = false; // do we display the full report
private long timelag = DEFAULT_TIME_LAG; // tables whose modtime is older
private static boolean forceExclusive = false; // only this hbck can modify HBase
private boolean fixAssignments = false; // fix assignment errors?
private boolean fixMeta = false; // fix meta errors?
private boolean checkHdfs = true; // load and check fs consistency?
private boolean fixHdfsHoles = false; // fix fs holes?
private boolean fixHdfsOverlaps = false; // fix fs overlaps (risky)
private boolean fixHdfsOrphans = false; // fix fs holes (missing .regioninfo)
private boolean fixTableOrphans = false; // fix fs holes (missing .tableinfo)
private boolean fixVersionFile = false; // fix missing hbase.version file in hdfs
private boolean fixSplitParents = false; // fix lingering split parents
private boolean removeParents = false; // remove split parents
private boolean fixReferenceFiles = false; // fix lingering reference store file
private boolean fixHFileLinks = false; // fix lingering HFileLinks
private boolean fixEmptyMetaCells = false; // fix (remove) empty REGIONINFO_QUALIFIER rows
private boolean fixReplication = false; // fix undeleted replication queues for removed peer
private boolean cleanReplicationBarrier = false; // clean replication barriers of a table
private boolean fixAny = false; // Set to true if any of the fix is required.
// limit checking/fixes to listed tables, if empty attempt to check/fix all
// hbase:meta are always checked
private Set tablesIncluded = new HashSet<>();
private TableName cleanReplicationBarrierTable;
private int maxMerge = DEFAULT_MAX_MERGE; // maximum number of overlapping regions to merge
// maximum number of overlapping regions to sideline
private int maxOverlapsToSideline = DEFAULT_OVERLAPS_TO_SIDELINE;
private boolean sidelineBigOverlaps = false; // sideline overlaps with >maxMerge regions
private Path sidelineDir = null;
private boolean rerun = false; // if we tried to fix something, rerun hbck
private static boolean summary = false; // if we want to print less output
private boolean checkMetaOnly = false;
private boolean checkRegionBoundaries = false;
private boolean ignorePreCheckPermission = false; // if pre-check permission
/*********
* State
*********/
final private HbckErrorReporter errors;
int fixes = 0;
/**
* This map contains the state of all hbck items. It maps from encoded region
* name to HbckRegionInfo structure. The information contained in HbckRegionInfo is used
* to detect and correct consistency (hdfs/meta/deployment) problems.
*/
private TreeMap regionInfoMap = new TreeMap<>();
// Empty regioninfo qualifiers in hbase:meta
private Set emptyRegionInfoQualifiers = new HashSet<>();
/**
* This map from Tablename -> TableInfo contains the structures necessary to
* detect table consistency problems (holes, dupes, overlaps). It is sorted
* to prevent dupes.
*
* If tablesIncluded is empty, this map contains all tables.
* Otherwise, it contains only meta tables and tables in tablesIncluded,
* unless checkMetaOnly is specified, in which case, it contains only
* the meta table
*/
private SortedMap tablesInfo = new ConcurrentSkipListMap<>();
/**
* When initially looking at HDFS, we attempt to find any orphaned data.
*/
private List orphanHdfsDirs = Collections.synchronizedList(new ArrayList<>());
private Map> orphanTableDirs = new HashMap<>();
private Map tableStates = new HashMap<>();
private final RetryCounterFactory lockFileRetryCounterFactory;
private final RetryCounterFactory createZNodeRetryCounterFactory;
private Map> skippedRegions = new HashMap<>();
private ZKWatcher zkw = null;
private String hbckEphemeralNodePath = null;
private boolean hbckZodeCreated = false;
/**
* Constructor
*
* @param conf Configuration object
* @throws MasterNotRunningException if the master is not running
* @throws ZooKeeperConnectionException if unable to connect to ZooKeeper
*/
public HBaseFsck(Configuration conf) throws IOException, ClassNotFoundException {
this(conf, createThreadPool(conf));
}
private static ExecutorService createThreadPool(Configuration conf) {
int numThreads = conf.getInt("hbasefsck.numthreads", MAX_NUM_THREADS);
return new ScheduledThreadPoolExecutor(numThreads, Threads.newDaemonThreadFactory("hbasefsck"));
}
/**
* Constructor
*
* @param conf
* Configuration object
* @throws MasterNotRunningException
* if the master is not running
* @throws ZooKeeperConnectionException
* if unable to connect to ZooKeeper
*/
public HBaseFsck(Configuration conf, ExecutorService exec) throws MasterNotRunningException,
ZooKeeperConnectionException, IOException, ClassNotFoundException {
super(conf);
errors = getErrorReporter(getConf());
this.executor = exec;
lockFileRetryCounterFactory = createLockRetryCounterFactory(getConf());
createZNodeRetryCounterFactory = createZnodeRetryCounterFactory(getConf());
zkw = createZooKeeperWatcher();
}
/**
* @return A retry counter factory configured for retrying lock file creation.
*/
public static RetryCounterFactory createLockRetryCounterFactory(Configuration conf) {
return new RetryCounterFactory(
conf.getInt("hbase.hbck.lockfile.attempts", DEFAULT_MAX_LOCK_FILE_ATTEMPTS),
conf.getInt("hbase.hbck.lockfile.attempt.sleep.interval",
DEFAULT_LOCK_FILE_ATTEMPT_SLEEP_INTERVAL),
conf.getInt("hbase.hbck.lockfile.attempt.maxsleeptime",
DEFAULT_LOCK_FILE_ATTEMPT_MAX_SLEEP_TIME));
}
/**
* @return A retry counter factory configured for retrying znode creation.
*/
private static RetryCounterFactory createZnodeRetryCounterFactory(Configuration conf) {
return new RetryCounterFactory(
conf.getInt("hbase.hbck.createznode.attempts", DEFAULT_MAX_CREATE_ZNODE_ATTEMPTS),
conf.getInt("hbase.hbck.createznode.attempt.sleep.interval",
DEFAULT_CREATE_ZNODE_ATTEMPT_SLEEP_INTERVAL),
conf.getInt("hbase.hbck.createznode.attempt.maxsleeptime",
DEFAULT_CREATE_ZNODE_ATTEMPT_MAX_SLEEP_TIME));
}
/**
* @return Return the tmp dir this tool writes too.
*/
@VisibleForTesting
public static Path getTmpDir(Configuration conf) throws IOException {
return new Path(FSUtils.getRootDir(conf), HConstants.HBASE_TEMP_DIRECTORY);
}
private static class FileLockCallable implements Callable {
RetryCounter retryCounter;
private final Configuration conf;
private Path hbckLockPath = null;
public FileLockCallable(Configuration conf, RetryCounter retryCounter) {
this.retryCounter = retryCounter;
this.conf = conf;
}
/**
* @return Will be null unless you call {@link #call()}
*/
Path getHbckLockPath() {
return this.hbckLockPath;
}
@Override
public FSDataOutputStream call() throws IOException {
try {
FileSystem fs = FSUtils.getCurrentFileSystem(this.conf);
FsPermission defaultPerms = FSUtils.getFilePermissions(fs, this.conf,
HConstants.DATA_FILE_UMASK_KEY);
Path tmpDir = getTmpDir(conf);
this.hbckLockPath = new Path(tmpDir, HBCK_LOCK_FILE);
fs.mkdirs(tmpDir);
final FSDataOutputStream out = createFileWithRetries(fs, this.hbckLockPath, defaultPerms);
out.writeBytes(InetAddress.getLocalHost().toString());
// Add a note into the file we write on why hbase2 is writing out an hbck1 lock file.
out.writeBytes(" Written by an hbase-2.x Master to block an " +
"attempt by an hbase-1.x HBCK tool making modification to state. " +
"See 'HBCK must match HBase server version' in the hbase refguide.");
out.flush();
return out;
} catch(RemoteException e) {
if(AlreadyBeingCreatedException.class.getName().equals(e.getClassName())){
return null;
} else {
throw e;
}
}
}
private FSDataOutputStream createFileWithRetries(final FileSystem fs,
final Path hbckLockFilePath, final FsPermission defaultPerms)
throws IOException {
IOException exception = null;
do {
try {
return FSUtils.create(fs, hbckLockFilePath, defaultPerms, false);
} catch (IOException ioe) {
LOG.info("Failed to create lock file " + hbckLockFilePath.getName()
+ ", try=" + (retryCounter.getAttemptTimes() + 1) + " of "
+ retryCounter.getMaxAttempts());
LOG.debug("Failed to create lock file " + hbckLockFilePath.getName(),
ioe);
try {
exception = ioe;
retryCounter.sleepUntilNextRetry();
} catch (InterruptedException ie) {
throw (InterruptedIOException) new InterruptedIOException(
"Can't create lock file " + hbckLockFilePath.getName())
.initCause(ie);
}
}
} while (retryCounter.shouldRetry());
throw exception;
}
}
/**
* This method maintains a lock using a file. If the creation fails we return null
*
* @return FSDataOutputStream object corresponding to the newly opened lock file
* @throws IOException if IO failure occurs
*/
public static Pair checkAndMarkRunningHbck(Configuration conf,
RetryCounter retryCounter) throws IOException {
FileLockCallable callable = new FileLockCallable(conf, retryCounter);
ExecutorService executor = Executors.newFixedThreadPool(1);
FutureTask futureTask = new FutureTask<>(callable);
executor.execute(futureTask);
final int timeoutInSeconds = conf.getInt(
"hbase.hbck.lockfile.maxwaittime", DEFAULT_WAIT_FOR_LOCK_TIMEOUT);
FSDataOutputStream stream = null;
try {
stream = futureTask.get(timeoutInSeconds, TimeUnit.SECONDS);
} catch (ExecutionException ee) {
LOG.warn("Encountered exception when opening lock file", ee);
} catch (InterruptedException ie) {
LOG.warn("Interrupted when opening lock file", ie);
Thread.currentThread().interrupt();
} catch (TimeoutException exception) {
// took too long to obtain lock
LOG.warn("Took more than " + timeoutInSeconds + " seconds in obtaining lock");
futureTask.cancel(true);
} finally {
executor.shutdownNow();
}
return new Pair(callable.getHbckLockPath(), stream);
}
private void unlockHbck() {
if (isExclusive() && hbckLockCleanup.compareAndSet(true, false)) {
RetryCounter retryCounter = lockFileRetryCounterFactory.create();
do {
try {
IOUtils.closeQuietly(hbckOutFd);
FSUtils.delete(FSUtils.getCurrentFileSystem(getConf()), HBCK_LOCK_PATH, true);
LOG.info("Finishing hbck");
return;
} catch (IOException ioe) {
LOG.info("Failed to delete " + HBCK_LOCK_PATH + ", try="
+ (retryCounter.getAttemptTimes() + 1) + " of "
+ retryCounter.getMaxAttempts());
LOG.debug("Failed to delete " + HBCK_LOCK_PATH, ioe);
try {
retryCounter.sleepUntilNextRetry();
} catch (InterruptedException ie) {
Thread.currentThread().interrupt();
LOG.warn("Interrupted while deleting lock file" +
HBCK_LOCK_PATH);
return;
}
}
} while (retryCounter.shouldRetry());
}
}
/**
* To repair region consistency, one must call connect() in order to repair
* online state.
*/
public void connect() throws IOException {
if (isExclusive()) {
// Grab the lock
Pair pair =
checkAndMarkRunningHbck(getConf(), this.lockFileRetryCounterFactory.create());
HBCK_LOCK_PATH = pair.getFirst();
this.hbckOutFd = pair.getSecond();
if (hbckOutFd == null) {
setRetCode(-1);
LOG.error("Another instance of hbck is fixing HBase, exiting this instance. " +
"[If you are sure no other instance is running, delete the lock file " +
HBCK_LOCK_PATH + " and rerun the tool]");
throw new IOException("Duplicate hbck - Abort");
}
// Make sure to cleanup the lock
hbckLockCleanup.set(true);
}
// Add a shutdown hook to this thread, in case user tries to
// kill the hbck with a ctrl-c, we want to cleanup the lock so that
// it is available for further calls
Runtime.getRuntime().addShutdownHook(new Thread() {
@Override
public void run() {
IOUtils.closeQuietly(HBaseFsck.this);
cleanupHbckZnode();
unlockHbck();
}
});
LOG.info("Launching hbck");
connection = (ClusterConnection)ConnectionFactory.createConnection(getConf());
admin = connection.getAdmin();
meta = connection.getTable(TableName.META_TABLE_NAME);
status = admin.getClusterMetrics(EnumSet.of(Option.LIVE_SERVERS,
Option.DEAD_SERVERS, Option.MASTER, Option.BACKUP_MASTERS,
Option.REGIONS_IN_TRANSITION, Option.HBASE_VERSION));
}
/**
* Get deployed regions according to the region servers.
*/
private void loadDeployedRegions() throws IOException, InterruptedException {
// From the master, get a list of all known live region servers
Collection regionServers = status.getLiveServerMetrics().keySet();
errors.print("Number of live region servers: " + regionServers.size());
if (details) {
for (ServerName rsinfo: regionServers) {
errors.print(" " + rsinfo.getServerName());
}
}
// From the master, get a list of all dead region servers
Collection deadRegionServers = status.getDeadServerNames();
errors.print("Number of dead region servers: " + deadRegionServers.size());
if (details) {
for (ServerName name: deadRegionServers) {
errors.print(" " + name);
}
}
// Print the current master name and state
errors.print("Master: " + status.getMasterName());
// Print the list of all backup masters
Collection backupMasters = status.getBackupMasterNames();
errors.print("Number of backup masters: " + backupMasters.size());
if (details) {
for (ServerName name: backupMasters) {
errors.print(" " + name);
}
}
errors.print("Average load: " + status.getAverageLoad());
errors.print("Number of requests: " + status.getRequestCount());
errors.print("Number of regions: " + status.getRegionCount());
List rits = status.getRegionStatesInTransition();
errors.print("Number of regions in transition: " + rits.size());
if (details) {
for (RegionState state: rits) {
errors.print(" " + state.toDescriptiveString());
}
}
// Determine what's deployed
processRegionServers(regionServers);
}
/**
* Clear the current state of hbck.
*/
private void clearState() {
// Make sure regionInfo is empty before starting
fixes = 0;
regionInfoMap.clear();
emptyRegionInfoQualifiers.clear();
tableStates.clear();
errors.clear();
tablesInfo.clear();
orphanHdfsDirs.clear();
skippedRegions.clear();
}
/**
* This repair method analyzes hbase data in hdfs and repairs it to satisfy
* the table integrity rules. HBase doesn't need to be online for this
* operation to work.
*/
public void offlineHdfsIntegrityRepair() throws IOException, InterruptedException {
// Initial pass to fix orphans.
if (shouldCheckHdfs() && (shouldFixHdfsOrphans() || shouldFixHdfsHoles()
|| shouldFixHdfsOverlaps() || shouldFixTableOrphans())) {
LOG.info("Loading regioninfos HDFS");
// if nothing is happening this should always complete in two iterations.
int maxIterations = getConf().getInt("hbase.hbck.integrityrepair.iterations.max", 3);
int curIter = 0;
do {
clearState(); // clears hbck state and reset fixes to 0 and.
// repair what's on HDFS
restoreHdfsIntegrity();
curIter++;// limit the number of iterations.
} while (fixes > 0 && curIter <= maxIterations);
// Repairs should be done in the first iteration and verification in the second.
// If there are more than 2 passes, something funny has happened.
if (curIter > 2) {
if (curIter == maxIterations) {
LOG.warn("Exiting integrity repairs after max " + curIter + " iterations. "
+ "Tables integrity may not be fully repaired!");
} else {
LOG.info("Successfully exiting integrity repairs after " + curIter + " iterations");
}
}
}
}
/**
* This repair method requires the cluster to be online since it contacts
* region servers and the masters. It makes each region's state in HDFS, in
* hbase:meta, and deployments consistent.
*
* @return If > 0 , number of errors detected, if < 0 there was an unrecoverable
* error. If 0, we have a clean hbase.
*/
public int onlineConsistencyRepair() throws IOException, KeeperException,
InterruptedException {
// get regions according to what is online on each RegionServer
loadDeployedRegions();
// check whether hbase:meta is deployed and online
recordMetaRegion();
// Check if hbase:meta is found only once and in the right place
if (!checkMetaRegion()) {
String errorMsg = "hbase:meta table is not consistent. ";
if (shouldFixAssignments()) {
errorMsg += "HBCK will try fixing it. Rerun once hbase:meta is back to consistent state.";
} else {
errorMsg += "Run HBCK with proper fix options to fix hbase:meta inconsistency.";
}
errors.reportError(errorMsg + " Exiting...");
return -2;
}
// Not going with further consistency check for tables when hbase:meta itself is not consistent.
LOG.info("Loading regionsinfo from the hbase:meta table");
boolean success = loadMetaEntries();
if (!success) return -1;
// Empty cells in hbase:meta?
reportEmptyMetaCells();
// Check if we have to cleanup empty REGIONINFO_QUALIFIER rows from hbase:meta
if (shouldFixEmptyMetaCells()) {
fixEmptyMetaCells();
}
// get a list of all tables that have not changed recently.
if (!checkMetaOnly) {
reportTablesInFlux();
}
// Get disabled tables states
loadTableStates();
// load regiondirs and regioninfos from HDFS
if (shouldCheckHdfs()) {
LOG.info("Loading region directories from HDFS");
loadHdfsRegionDirs();
LOG.info("Loading region information from HDFS");
loadHdfsRegionInfos();
}
// fix the orphan tables
fixOrphanTables();
LOG.info("Checking and fixing region consistency");
// Check and fix consistency
checkAndFixConsistency();
// Check integrity (does not fix)
checkIntegrity();
return errors.getErrorList().size();
}
/**
* This method maintains an ephemeral znode. If the creation fails we return false or throw
* exception
*
* @return true if creating znode succeeds; false otherwise
* @throws IOException if IO failure occurs
*/
private boolean setMasterInMaintenanceMode() throws IOException {
RetryCounter retryCounter = createZNodeRetryCounterFactory.create();
hbckEphemeralNodePath = ZNodePaths.joinZNode(
zkw.getZNodePaths().masterMaintZNode,
"hbck-" + Long.toString(EnvironmentEdgeManager.currentTime()));
do {
try {
hbckZodeCreated = ZKUtil.createEphemeralNodeAndWatch(zkw, hbckEphemeralNodePath, null);
if (hbckZodeCreated) {
break;
}
} catch (KeeperException e) {
if (retryCounter.getAttemptTimes() >= retryCounter.getMaxAttempts()) {
throw new IOException("Can't create znode " + hbckEphemeralNodePath, e);
}
// fall through and retry
}
LOG.warn("Fail to create znode " + hbckEphemeralNodePath + ", try=" +
(retryCounter.getAttemptTimes() + 1) + " of " + retryCounter.getMaxAttempts());
try {
retryCounter.sleepUntilNextRetry();
} catch (InterruptedException ie) {
throw (InterruptedIOException) new InterruptedIOException(
"Can't create znode " + hbckEphemeralNodePath).initCause(ie);
}
} while (retryCounter.shouldRetry());
return hbckZodeCreated;
}
private void cleanupHbckZnode() {
try {
if (zkw != null && hbckZodeCreated) {
ZKUtil.deleteNode(zkw, hbckEphemeralNodePath);
hbckZodeCreated = false;
}
} catch (KeeperException e) {
// Ignore
if (!e.code().equals(KeeperException.Code.NONODE)) {
LOG.warn("Delete HBCK znode " + hbckEphemeralNodePath + " failed ", e);
}
}
}
/**
* Contacts the master and prints out cluster-wide information
* @return 0 on success, non-zero on failure
*/
public int onlineHbck()
throws IOException, KeeperException, InterruptedException, ReplicationException {
// print hbase server version
errors.print("Version: " + status.getHBaseVersion());
// Clean start
clearState();
// Do offline check and repair first
offlineHdfsIntegrityRepair();
offlineReferenceFileRepair();
offlineHLinkFileRepair();
// If Master runs maintenance tasks (such as balancer, catalog janitor, etc) during online
// hbck, it is likely that hbck would be misled and report transient errors. Therefore, it
// is better to set Master into maintenance mode during online hbck.
//
if (!setMasterInMaintenanceMode()) {
LOG.warn("HBCK is running while master is not in maintenance mode, you might see transient "
+ "error. Please run HBCK multiple times to reduce the chance of transient error.");
}
onlineConsistencyRepair();
if (checkRegionBoundaries) {
checkRegionBoundaries();
}
checkAndFixReplication();
cleanReplicationBarrier();
// Remove the hbck znode
cleanupHbckZnode();
// Remove the hbck lock
unlockHbck();
// Print table summary
printTableSummary(tablesInfo);
return errors.summarize();
}
public static byte[] keyOnly(byte[] b) {
if (b == null)
return b;
int rowlength = Bytes.toShort(b, 0);
byte[] result = new byte[rowlength];
System.arraycopy(b, Bytes.SIZEOF_SHORT, result, 0, rowlength);
return result;
}
@Override
public void close() throws IOException {
try {
cleanupHbckZnode();
unlockHbck();
} catch (Exception io) {
LOG.warn(io.toString(), io);
} finally {
if (zkw != null) {
zkw.close();
zkw = null;
}
IOUtils.closeQuietly(admin);
IOUtils.closeQuietly(meta);
IOUtils.closeQuietly(connection);
}
}
private static class RegionBoundariesInformation {
public byte [] regionName;
public byte [] metaFirstKey;
public byte [] metaLastKey;
public byte [] storesFirstKey;
public byte [] storesLastKey;
@Override
public String toString () {
return "regionName=" + Bytes.toStringBinary(regionName) +
"\nmetaFirstKey=" + Bytes.toStringBinary(metaFirstKey) +
"\nmetaLastKey=" + Bytes.toStringBinary(metaLastKey) +
"\nstoresFirstKey=" + Bytes.toStringBinary(storesFirstKey) +
"\nstoresLastKey=" + Bytes.toStringBinary(storesLastKey);
}
}
public void checkRegionBoundaries() {
try {
ByteArrayComparator comparator = new ByteArrayComparator();
List regions = MetaTableAccessor.getAllRegions(connection, true);
final RegionBoundariesInformation currentRegionBoundariesInformation =
new RegionBoundariesInformation();
Path hbaseRoot = FSUtils.getRootDir(getConf());
for (RegionInfo regionInfo : regions) {
Path tableDir = FSUtils.getTableDir(hbaseRoot, regionInfo.getTable());
currentRegionBoundariesInformation.regionName = regionInfo.getRegionName();
// For each region, get the start and stop key from the META and compare them to the
// same information from the Stores.
Path path = new Path(tableDir, regionInfo.getEncodedName());
FileSystem fs = path.getFileSystem(getConf());
FileStatus[] files = fs.listStatus(path);
// For all the column families in this region...
byte[] storeFirstKey = null;
byte[] storeLastKey = null;
for (FileStatus file : files) {
String fileName = file.getPath().toString();
fileName = fileName.substring(fileName.lastIndexOf("/") + 1);
if (!fileName.startsWith(".") && !fileName.endsWith("recovered.edits")) {
FileStatus[] storeFiles = fs.listStatus(file.getPath());
// For all the stores in this column family.
for (FileStatus storeFile : storeFiles) {
HFile.Reader reader = HFile.createReader(fs, storeFile.getPath(),
CacheConfig.DISABLED, true, getConf());
if ((reader.getFirstKey() != null)
&& ((storeFirstKey == null) || (comparator.compare(storeFirstKey,
((KeyValue.KeyOnlyKeyValue) reader.getFirstKey().get()).getKey()) > 0))) {
storeFirstKey = ((KeyValue.KeyOnlyKeyValue)reader.getFirstKey().get()).getKey();
}
if ((reader.getLastKey() != null)
&& ((storeLastKey == null) || (comparator.compare(storeLastKey,
((KeyValue.KeyOnlyKeyValue)reader.getLastKey().get()).getKey())) < 0)) {
storeLastKey = ((KeyValue.KeyOnlyKeyValue)reader.getLastKey().get()).getKey();
}
reader.close();
}
}
}
currentRegionBoundariesInformation.metaFirstKey = regionInfo.getStartKey();
currentRegionBoundariesInformation.metaLastKey = regionInfo.getEndKey();
currentRegionBoundariesInformation.storesFirstKey = keyOnly(storeFirstKey);
currentRegionBoundariesInformation.storesLastKey = keyOnly(storeLastKey);
if (currentRegionBoundariesInformation.metaFirstKey.length == 0)
currentRegionBoundariesInformation.metaFirstKey = null;
if (currentRegionBoundariesInformation.metaLastKey.length == 0)
currentRegionBoundariesInformation.metaLastKey = null;
// For a region to be correct, we need the META start key to be smaller or equal to the
// smallest start key from all the stores, and the start key from the next META entry to
// be bigger than the last key from all the current stores. First region start key is null;
// Last region end key is null; some regions can be empty and not have any store.
boolean valid = true;
// Checking start key.
if ((currentRegionBoundariesInformation.storesFirstKey != null)
&& (currentRegionBoundariesInformation.metaFirstKey != null)) {
valid = valid
&& comparator.compare(currentRegionBoundariesInformation.storesFirstKey,
currentRegionBoundariesInformation.metaFirstKey) >= 0;
}
// Checking stop key.
if ((currentRegionBoundariesInformation.storesLastKey != null)
&& (currentRegionBoundariesInformation.metaLastKey != null)) {
valid = valid
&& comparator.compare(currentRegionBoundariesInformation.storesLastKey,
currentRegionBoundariesInformation.metaLastKey) < 0;
}
if (!valid) {
errors.reportError(ERROR_CODE.BOUNDARIES_ERROR, "Found issues with regions boundaries",
tablesInfo.get(regionInfo.getTable()));
LOG.warn("Region's boundaries not aligned between stores and META for:");
LOG.warn(Objects.toString(currentRegionBoundariesInformation));
}
}
} catch (IOException e) {
LOG.error(e.toString(), e);
}
}
/**
* Iterates through the list of all orphan/invalid regiondirs.
*/
private void adoptHdfsOrphans(Collection orphanHdfsDirs) throws IOException {
for (HbckRegionInfo hi : orphanHdfsDirs) {
LOG.info("Attempting to handle orphan hdfs dir: " + hi.getHdfsRegionDir());
adoptHdfsOrphan(hi);
}
}
/**
* Orphaned regions are regions without a .regioninfo file in them. We "adopt"
* these orphans by creating a new region, and moving the column families,
* recovered edits, WALs, into the new region dir. We determine the region
* startkey and endkeys by looking at all of the hfiles inside the column
* families to identify the min and max keys. The resulting region will
* likely violate table integrity but will be dealt with by merging
* overlapping regions.
*/
@SuppressWarnings("deprecation")
private void adoptHdfsOrphan(HbckRegionInfo hi) throws IOException {
Path p = hi.getHdfsRegionDir();
FileSystem fs = p.getFileSystem(getConf());
FileStatus[] dirs = fs.listStatus(p);
if (dirs == null) {
LOG.warn("Attempt to adopt orphan hdfs region skipped because no files present in " +
p + ". This dir could probably be deleted.");
return ;
}
TableName tableName = hi.getTableName();
HbckTableInfo tableInfo = tablesInfo.get(tableName);
Preconditions.checkNotNull(tableInfo, "Table '" + tableName + "' not present!");
TableDescriptor template = tableInfo.getTableDescriptor();
// find min and max key values
Pair orphanRegionRange = null;
for (FileStatus cf : dirs) {
String cfName= cf.getPath().getName();
// TODO Figure out what the special dirs are
if (cfName.startsWith(".") || cfName.equals(HConstants.SPLIT_LOGDIR_NAME)) continue;
FileStatus[] hfiles = fs.listStatus(cf.getPath());
for (FileStatus hfile : hfiles) {
byte[] start, end;
HFile.Reader hf = null;
try {
hf = HFile.createReader(fs, hfile.getPath(), CacheConfig.DISABLED, true, getConf());
hf.loadFileInfo();
Optional startKv = hf.getFirstKey();
start = CellUtil.cloneRow(startKv.get());
Optional| endKv = hf.getLastKey();
end = CellUtil.cloneRow(endKv.get());
} catch (IOException ioe) {
LOG.warn("Problem reading orphan file " + hfile + ", skipping");
continue;
} catch (NullPointerException ioe) {
LOG.warn("Orphan file " + hfile + " is possibly corrupted HFile, skipping");
continue;
} finally {
if (hf != null) {
hf.close();
}
}
// expand the range to include the range of all hfiles
if (orphanRegionRange == null) {
// first range
orphanRegionRange = new Pair<>(start, end);
} else {
// TODO add test
// expand range only if the hfile is wider.
if (Bytes.compareTo(orphanRegionRange.getFirst(), start) > 0) {
orphanRegionRange.setFirst(start);
}
if (Bytes.compareTo(orphanRegionRange.getSecond(), end) < 0 ) {
orphanRegionRange.setSecond(end);
}
}
}
}
if (orphanRegionRange == null) {
LOG.warn("No data in dir " + p + ", sidelining data");
fixes++;
sidelineRegionDir(fs, hi);
return;
}
LOG.info("Min max keys are : [" + Bytes.toString(orphanRegionRange.getFirst()) + ", " +
Bytes.toString(orphanRegionRange.getSecond()) + ")");
// create new region on hdfs. move data into place.
RegionInfo regionInfo = RegionInfoBuilder.newBuilder(template.getTableName())
.setStartKey(orphanRegionRange.getFirst())
.setEndKey(Bytes.add(orphanRegionRange.getSecond(), new byte[1]))
.build();
LOG.info("Creating new region : " + regionInfo);
HRegion region = HBaseFsckRepair.createHDFSRegionDir(getConf(), regionInfo, template);
Path target = region.getRegionFileSystem().getRegionDir();
// rename all the data to new region
mergeRegionDirs(target, hi);
fixes++;
}
/**
* This method determines if there are table integrity errors in HDFS. If
* there are errors and the appropriate "fix" options are enabled, the method
* will first correct orphan regions making them into legit regiondirs, and
* then reload to merge potentially overlapping regions.
*
* @return number of table integrity errors found
*/
private int restoreHdfsIntegrity() throws IOException, InterruptedException {
// Determine what's on HDFS
LOG.info("Loading HBase regioninfo from HDFS...");
loadHdfsRegionDirs(); // populating regioninfo table.
int errs = errors.getErrorList().size();
// First time just get suggestions.
tablesInfo = loadHdfsRegionInfos(); // update tableInfos based on region info in fs.
checkHdfsIntegrity(false, false);
if (errors.getErrorList().size() == errs) {
LOG.info("No integrity errors. We are done with this phase. Glorious.");
return 0;
}
if (shouldFixHdfsOrphans() && orphanHdfsDirs.size() > 0) {
adoptHdfsOrphans(orphanHdfsDirs);
// TODO optimize by incrementally adding instead of reloading.
}
// Make sure there are no holes now.
if (shouldFixHdfsHoles()) {
clearState(); // this also resets # fixes.
loadHdfsRegionDirs();
tablesInfo = loadHdfsRegionInfos(); // update tableInfos based on region info in fs.
tablesInfo = checkHdfsIntegrity(shouldFixHdfsHoles(), false);
}
// Now we fix overlaps
if (shouldFixHdfsOverlaps()) {
// second pass we fix overlaps.
clearState(); // this also resets # fixes.
loadHdfsRegionDirs();
tablesInfo = loadHdfsRegionInfos(); // update tableInfos based on region info in fs.
tablesInfo = checkHdfsIntegrity(false, shouldFixHdfsOverlaps());
}
return errors.getErrorList().size();
}
/**
* Scan all the store file names to find any lingering reference files,
* which refer to some none-exiting files. If "fix" option is enabled,
* any lingering reference file will be sidelined if found.
*
* Lingering reference file prevents a region from opening. It has to
* be fixed before a cluster can start properly.
*/
private void offlineReferenceFileRepair() throws IOException, InterruptedException {
clearState();
Configuration conf = getConf();
Path hbaseRoot = FSUtils.getRootDir(conf);
FileSystem fs = hbaseRoot.getFileSystem(conf);
LOG.info("Computing mapping of all store files");
Map allFiles = FSUtils.getTableStoreFilePathMap(fs, hbaseRoot,
new FSUtils.ReferenceFileFilter(fs), executor, errors);
errors.print("");
LOG.info("Validating mapping using HDFS state");
for (Path path: allFiles.values()) {
Path referredToFile = StoreFileInfo.getReferredToFile(path);
if (fs.exists(referredToFile)) continue; // good, expected
// Found a lingering reference file
errors.reportError(ERROR_CODE.LINGERING_REFERENCE_HFILE,
"Found lingering reference file " + path);
if (!shouldFixReferenceFiles()) continue;
// Now, trying to fix it since requested
boolean success = false;
String pathStr = path.toString();
// A reference file path should be like
// ${hbase.rootdir}/data/namespace/table_name/region_id/family_name/referred_file.region_name
// Up 5 directories to get the root folder.
// So the file will be sidelined to a similar folder structure.
int index = pathStr.lastIndexOf(Path.SEPARATOR_CHAR);
for (int i = 0; index > 0 && i < 5; i++) {
index = pathStr.lastIndexOf(Path.SEPARATOR_CHAR, index - 1);
}
if (index > 0) {
Path rootDir = getSidelineDir();
Path dst = new Path(rootDir, pathStr.substring(index + 1));
fs.mkdirs(dst.getParent());
LOG.info("Trying to sideline reference file "
+ path + " to " + dst);
setShouldRerun();
success = fs.rename(path, dst);
debugLsr(dst);
}
if (!success) {
LOG.error("Failed to sideline reference file " + path);
}
}
}
/**
* Scan all the store file names to find any lingering HFileLink files,
* which refer to some none-exiting files. If "fix" option is enabled,
* any lingering HFileLink file will be sidelined if found.
*/
private void offlineHLinkFileRepair() throws IOException, InterruptedException {
Configuration conf = getConf();
Path hbaseRoot = FSUtils.getRootDir(conf);
FileSystem fs = hbaseRoot.getFileSystem(conf);
LOG.info("Computing mapping of all link files");
Map allFiles = FSUtils
.getTableStoreFilePathMap(fs, hbaseRoot, new FSUtils.HFileLinkFilter(), executor, errors);
errors.print("");
LOG.info("Validating mapping using HDFS state");
for (Path path : allFiles.values()) {
// building HFileLink object to gather locations
HFileLink actualLink = HFileLink.buildFromHFileLinkPattern(conf, path);
if (actualLink.exists(fs)) continue; // good, expected
// Found a lingering HFileLink
errors.reportError(ERROR_CODE.LINGERING_HFILELINK, "Found lingering HFileLink " + path);
if (!shouldFixHFileLinks()) continue;
// Now, trying to fix it since requested
setShouldRerun();
// An HFileLink path should be like
// ${hbase.rootdir}/data/namespace/table_name/region_id/family_name/linkedtable=linkedregionname-linkedhfilename
// sidelineing will happen in the ${hbase.rootdir}/${sidelinedir} directory with the same folder structure.
boolean success = sidelineFile(fs, hbaseRoot, path);
if (!success) {
LOG.error("Failed to sideline HFileLink file " + path);
}
// An HFileLink backreference path should be like
// ${hbase.rootdir}/archive/data/namespace/table_name/region_id/family_name/.links-linkedhfilename
// sidelineing will happen in the ${hbase.rootdir}/${sidelinedir} directory with the same folder structure.
Path backRefPath = FileLink.getBackReferencesDir(HFileArchiveUtil
.getStoreArchivePath(conf, HFileLink.getReferencedTableName(path.getName().toString()),
HFileLink.getReferencedRegionName(path.getName().toString()),
path.getParent().getName()),
HFileLink.getReferencedHFileName(path.getName().toString()));
success = sidelineFile(fs, hbaseRoot, backRefPath);
if (!success) {
LOG.error("Failed to sideline HFileLink backreference file " + path);
}
}
}
private boolean sidelineFile(FileSystem fs, Path hbaseRoot, Path path) throws IOException {
URI uri = hbaseRoot.toUri().relativize(path.toUri());
if (uri.isAbsolute()) return false;
String relativePath = uri.getPath();
Path rootDir = getSidelineDir();
Path dst = new Path(rootDir, relativePath);
boolean pathCreated = fs.mkdirs(dst.getParent());
if (!pathCreated) {
LOG.error("Failed to create path: " + dst.getParent());
return false;
}
LOG.info("Trying to sideline file " + path + " to " + dst);
return fs.rename(path, dst);
}
/**
* TODO -- need to add tests for this.
*/
private void reportEmptyMetaCells() {
errors.print("Number of empty REGIONINFO_QUALIFIER rows in hbase:meta: " +
emptyRegionInfoQualifiers.size());
if (details) {
for (Result r: emptyRegionInfoQualifiers) {
errors.print(" " + r);
}
}
}
/**
* TODO -- need to add tests for this.
*/
private void reportTablesInFlux() {
AtomicInteger numSkipped = new AtomicInteger(0);
TableDescriptor[] allTables = getTables(numSkipped);
errors.print("Number of Tables: " + allTables.length);
if (details) {
if (numSkipped.get() > 0) {
errors.detail("Number of Tables in flux: " + numSkipped.get());
}
for (TableDescriptor td : allTables) {
errors.detail(" Table: " + td.getTableName() + "\t" +
(td.isReadOnly() ? "ro" : "rw") + "\t" +
(td.isMetaRegion() ? "META" : " ") + "\t" +
" families: " + td.getColumnFamilyCount());
}
}
}
public HbckErrorReporter getErrors() {
return errors;
}
/**
* Populate hbi's from regionInfos loaded from file system.
*/
private SortedMap loadHdfsRegionInfos()
throws IOException, InterruptedException {
tablesInfo.clear(); // regenerating the data
// generate region split structure
Collection hbckRegionInfos = regionInfoMap.values();
// Parallelized read of .regioninfo files.
List hbis = new ArrayList<>(hbckRegionInfos.size());
List> hbiFutures;
for (HbckRegionInfo hbi : hbckRegionInfos) {
WorkItemHdfsRegionInfo work = new WorkItemHdfsRegionInfo(hbi, this, errors);
hbis.add(work);
}
// Submit and wait for completion
hbiFutures = executor.invokeAll(hbis);
for(int i=0; i f = hbiFutures.get(i);
try {
f.get();
} catch(ExecutionException e) {
LOG.warn("Failed to read .regioninfo file for region " +
work.hbi.getRegionNameAsString(), e.getCause());
}
}
Path hbaseRoot = FSUtils.getRootDir(getConf());
FileSystem fs = hbaseRoot.getFileSystem(getConf());
// serialized table info gathering.
for (HbckRegionInfo hbi: hbckRegionInfos) {
if (hbi.getHdfsHRI() == null) {
// was an orphan
continue;
}
// get table name from hdfs, populate various HBaseFsck tables.
TableName tableName = hbi.getTableName();
if (tableName == null) {
// There was an entry in hbase:meta not in the HDFS?
LOG.warn("tableName was null for: " + hbi);
continue;
}
HbckTableInfo modTInfo = tablesInfo.get(tableName);
if (modTInfo == null) {
// only executed once per table.
modTInfo = new HbckTableInfo(tableName, this);
tablesInfo.put(tableName, modTInfo);
try {
TableDescriptor htd =
FSTableDescriptors.getTableDescriptorFromFs(fs, hbaseRoot, tableName);
modTInfo.htds.add(htd);
} catch (IOException ioe) {
if (!orphanTableDirs.containsKey(tableName)) {
LOG.warn("Unable to read .tableinfo from " + hbaseRoot, ioe);
//should only report once for each table
errors.reportError(ERROR_CODE.NO_TABLEINFO_FILE,
"Unable to read .tableinfo from " + hbaseRoot + "/" + tableName);
Set columns = new HashSet<>();
orphanTableDirs.put(tableName, getColumnFamilyList(columns, hbi));
}
}
}
if (!hbi.isSkipChecks()) {
modTInfo.addRegionInfo(hbi);
}
}
loadTableInfosForTablesWithNoRegion();
errors.print("");
return tablesInfo;
}
/**
* To get the column family list according to the column family dirs
* @param columns
* @param hbi
* @return a set of column families
* @throws IOException
*/
private Set getColumnFamilyList(Set columns, HbckRegionInfo hbi)
throws IOException {
Path regionDir = hbi.getHdfsRegionDir();
FileSystem fs = regionDir.getFileSystem(getConf());
FileStatus[] subDirs = fs.listStatus(regionDir, new FSUtils.FamilyDirFilter(fs));
for (FileStatus subdir : subDirs) {
String columnfamily = subdir.getPath().getName();
columns.add(columnfamily);
}
return columns;
}
/**
* To fabricate a .tableinfo file with following contents
* 1. the correct tablename
* 2. the correct colfamily list
* 3. the default properties for both {@link TableDescriptor} and {@link ColumnFamilyDescriptor}
* @throws IOException
*/
private boolean fabricateTableInfo(FSTableDescriptors fstd, TableName tableName,
Set columns) throws IOException {
if (columns ==null || columns.isEmpty()) return false;
TableDescriptorBuilder builder = TableDescriptorBuilder.newBuilder(tableName);
for (String columnfamimly : columns) {
builder.setColumnFamily(ColumnFamilyDescriptorBuilder.of(columnfamimly));
}
fstd.createTableDescriptor(builder.build(), true);
return true;
}
/**
* To fix the empty REGIONINFO_QUALIFIER rows from hbase:meta
* @throws IOException
*/
public void fixEmptyMetaCells() throws IOException {
if (shouldFixEmptyMetaCells() && !emptyRegionInfoQualifiers.isEmpty()) {
LOG.info("Trying to fix empty REGIONINFO_QUALIFIER hbase:meta rows.");
for (Result region : emptyRegionInfoQualifiers) {
deleteMetaRegion(region.getRow());
errors.getErrorList().remove(ERROR_CODE.EMPTY_META_CELL);
}
emptyRegionInfoQualifiers.clear();
}
}
/**
* To fix orphan table by creating a .tableinfo file under tableDir
* 1. if TableInfo is cached, to recover the .tableinfo accordingly
* 2. else create a default .tableinfo file with following items
* 2.1 the correct tablename
* 2.2 the correct colfamily list
* 2.3 the default properties for both {@link TableDescriptor} and {@link ColumnFamilyDescriptor}
* @throws IOException
*/
public void fixOrphanTables() throws IOException {
if (shouldFixTableOrphans() && !orphanTableDirs.isEmpty()) {
List tmpList = new ArrayList<>(orphanTableDirs.keySet().size());
tmpList.addAll(orphanTableDirs.keySet());
TableDescriptor[] htds = getTableDescriptors(tmpList);
Iterator>> iter =
orphanTableDirs.entrySet().iterator();
int j = 0;
int numFailedCase = 0;
FSTableDescriptors fstd = new FSTableDescriptors(getConf());
while (iter.hasNext()) {
Entry> entry =
iter.next();
TableName tableName = entry.getKey();
LOG.info("Trying to fix orphan table error: " + tableName);
if (j < htds.length) {
if (tableName.equals(htds[j].getTableName())) {
TableDescriptor htd = htds[j];
LOG.info("fixing orphan table: " + tableName + " from cache");
fstd.createTableDescriptor(htd, true);
j++;
iter.remove();
}
} else {
if (fabricateTableInfo(fstd, tableName, entry.getValue())) {
LOG.warn("fixing orphan table: " + tableName + " with a default .tableinfo file");
LOG.warn("Strongly recommend to modify the TableDescriptor if necessary for: " + tableName);
iter.remove();
} else {
LOG.error("Unable to create default .tableinfo for " + tableName + " while missing column family information");
numFailedCase++;
}
}
fixes++;
}
if (orphanTableDirs.isEmpty()) {
// all orphanTableDirs are luckily recovered
// re-run doFsck after recovering the .tableinfo file
setShouldRerun();
LOG.warn("Strongly recommend to re-run manually hfsck after all orphanTableDirs being fixed");
} else if (numFailedCase > 0) {
LOG.error("Failed to fix " + numFailedCase
+ " OrphanTables with default .tableinfo files");
}
}
//cleanup the list
orphanTableDirs.clear();
}
/**
* Log an appropriate message about whether or not overlapping merges are computed in parallel.
*/
private void logParallelMerge() {
if (getConf().getBoolean("hbasefsck.overlap.merge.parallel", true)) {
LOG.info("Handling overlap merges in parallel. set hbasefsck.overlap.merge.parallel to" +
" false to run serially.");
} else {
LOG.info("Handling overlap merges serially. set hbasefsck.overlap.merge.parallel to" +
" true to run in parallel.");
}
}
private SortedMap checkHdfsIntegrity(boolean fixHoles,
boolean fixOverlaps) throws IOException {
LOG.info("Checking HBase region split map from HDFS data...");
logParallelMerge();
for (HbckTableInfo tInfo : tablesInfo.values()) {
TableIntegrityErrorHandler handler;
if (fixHoles || fixOverlaps) {
handler = tInfo.new HDFSIntegrityFixer(tInfo, errors, getConf(),
fixHoles, fixOverlaps);
} else {
handler = tInfo.new IntegrityFixSuggester(tInfo, errors);
}
if (!tInfo.checkRegionChain(handler)) {
// should dump info as well.
errors.report("Found inconsistency in table " + tInfo.getName());
}
}
return tablesInfo;
}
Path getSidelineDir() throws IOException {
if (sidelineDir == null) {
Path hbaseDir = FSUtils.getRootDir(getConf());
Path hbckDir = new Path(hbaseDir, HConstants.HBCK_SIDELINEDIR_NAME);
sidelineDir = new Path(hbckDir, hbaseDir.getName() + "-"
+ startMillis);
}
return sidelineDir;
}
/**
* Sideline a region dir (instead of deleting it)
*/
Path sidelineRegionDir(FileSystem fs, HbckRegionInfo hi) throws IOException {
return sidelineRegionDir(fs, null, hi);
}
/**
* Sideline a region dir (instead of deleting it)
*
* @param parentDir if specified, the region will be sidelined to folder like
* {@literal .../parentDir//}. The purpose is to group together
* similar regions sidelined, for example, those regions should be bulk loaded back later
* on. If NULL, it is ignored.
*/
Path sidelineRegionDir(FileSystem fs,
String parentDir, HbckRegionInfo hi) throws IOException {
TableName tableName = hi.getTableName();
Path regionDir = hi.getHdfsRegionDir();
if (!fs.exists(regionDir)) {
LOG.warn("No previous " + regionDir + " exists. Continuing.");
return null;
}
Path rootDir = getSidelineDir();
if (parentDir != null) {
rootDir = new Path(rootDir, parentDir);
}
Path sidelineTableDir= FSUtils.getTableDir(rootDir, tableName);
Path sidelineRegionDir = new Path(sidelineTableDir, regionDir.getName());
fs.mkdirs(sidelineRegionDir);
boolean success = false;
FileStatus[] cfs = fs.listStatus(regionDir);
if (cfs == null) {
LOG.info("Region dir is empty: " + regionDir);
} else {
for (FileStatus cf : cfs) {
Path src = cf.getPath();
Path dst = new Path(sidelineRegionDir, src.getName());
if (fs.isFile(src)) {
// simple file
success = fs.rename(src, dst);
if (!success) {
String msg = "Unable to rename file " + src + " to " + dst;
LOG.error(msg);
throw new IOException(msg);
}
continue;
}
// is a directory.
fs.mkdirs(dst);
LOG.info("Sidelining files from " + src + " into containing region " + dst);
// FileSystem.rename is inconsistent with directories -- if the
// dst (foo/a) exists and is a dir, and the src (foo/b) is a dir,
// it moves the src into the dst dir resulting in (foo/a/b). If
// the dst does not exist, and the src a dir, src becomes dst. (foo/b)
FileStatus[] hfiles = fs.listStatus(src);
if (hfiles != null && hfiles.length > 0) {
for (FileStatus hfile : hfiles) {
success = fs.rename(hfile.getPath(), dst);
if (!success) {
String msg = "Unable to rename file " + src + " to " + dst;
LOG.error(msg);
throw new IOException(msg);
}
}
}
LOG.debug("Sideline directory contents:");
debugLsr(sidelineRegionDir);
}
}
LOG.info("Removing old region dir: " + regionDir);
success = fs.delete(regionDir, true);
if (!success) {
String msg = "Unable to delete dir " + regionDir;
LOG.error(msg);
throw new IOException(msg);
}
return sidelineRegionDir;
}
/**
* Load the list of disabled tables in ZK into local set.
* @throws ZooKeeperConnectionException
* @throws IOException
*/
private void loadTableStates()
throws IOException {
tableStates = MetaTableAccessor.getTableStates(connection);
// Add hbase:meta so this tool keeps working. In hbase2, meta is always enabled though it
// has no entry in the table states. HBCK doesn't work right w/ hbase2 but just do this in
// meantime.
this.tableStates.put(TableName.META_TABLE_NAME,
new TableState(TableName.META_TABLE_NAME, TableState.State.ENABLED));
}
/**
* Check if the specified region's table is disabled.
* @param tableName table to check status of
*/
boolean isTableDisabled(TableName tableName) {
return tableStates.containsKey(tableName)
&& tableStates.get(tableName)
.inStates(TableState.State.DISABLED, TableState.State.DISABLING);
}
/**
* Scan HDFS for all regions, recording their information into
* regionInfoMap
*/
public void loadHdfsRegionDirs() throws IOException, InterruptedException {
Path rootDir = FSUtils.getRootDir(getConf());
FileSystem fs = rootDir.getFileSystem(getConf());
// list all tables from HDFS
List tableDirs = Lists.newArrayList();
boolean foundVersionFile = fs.exists(new Path(rootDir, HConstants.VERSION_FILE_NAME));
List paths = FSUtils.getTableDirs(fs, rootDir);
for (Path path : paths) {
TableName tableName = FSUtils.getTableName(path);
if ((!checkMetaOnly &&
isTableIncluded(tableName)) ||
tableName.equals(TableName.META_TABLE_NAME)) {
tableDirs.add(fs.getFileStatus(path));
}
}
// verify that version file exists
if (!foundVersionFile) {
errors.reportError(ERROR_CODE.NO_VERSION_FILE,
"Version file does not exist in root dir " + rootDir);
if (shouldFixVersionFile()) {
LOG.info("Trying to create a new " + HConstants.VERSION_FILE_NAME
+ " file.");
setShouldRerun();
FSUtils.setVersion(fs, rootDir, getConf().getInt(
HConstants.THREAD_WAKE_FREQUENCY, 10 * 1000), getConf().getInt(
HConstants.VERSION_FILE_WRITE_ATTEMPTS,
HConstants.DEFAULT_VERSION_FILE_WRITE_ATTEMPTS));
}
}
// Avoid multithreading at table-level because already multithreaded internally at
// region-level. Additionally multithreading at table-level can lead to deadlock
// if there are many tables in the cluster. Since there are a limited # of threads
// in the executor's thread pool and if we multithread at the table-level by putting
// WorkItemHdfsDir callables into the executor, then we will have some threads in the
// executor tied up solely in waiting for the tables' region-level calls to complete.
// If there are enough tables then there will be no actual threads in the pool left
// for the region-level callables to be serviced.
for (FileStatus tableDir : tableDirs) {
LOG.debug("Loading region dirs from " +tableDir.getPath());
WorkItemHdfsDir item = new WorkItemHdfsDir(fs, errors, tableDir);
try {
item.call();
} catch (ExecutionException e) {
LOG.warn("Could not completely load table dir " +
tableDir.getPath(), e.getCause());
}
}
errors.print("");
}
/**
* Record the location of the hbase:meta region as found in ZooKeeper.
*/
private boolean recordMetaRegion() throws IOException {
RegionLocations rl = connection.locateRegion(TableName.META_TABLE_NAME,
HConstants.EMPTY_START_ROW, false, false);
if (rl == null) {
errors.reportError(ERROR_CODE.NULL_META_REGION,
"META region was not found in ZooKeeper");
return false;
}
for (HRegionLocation metaLocation : rl.getRegionLocations()) {
// Check if Meta region is valid and existing
if (metaLocation == null ) {
errors.reportError(ERROR_CODE.NULL_META_REGION,
"META region location is null");
return false;
}
if (metaLocation.getRegionInfo() == null) {
errors.reportError(ERROR_CODE.NULL_META_REGION,
"META location regionInfo is null");
return false;
}
if (metaLocation.getHostname() == null) {
errors.reportError(ERROR_CODE.NULL_META_REGION,
"META location hostName is null");
return false;
}
ServerName sn = metaLocation.getServerName();
HbckRegionInfo.MetaEntry m = new HbckRegionInfo.MetaEntry(metaLocation.getRegion(), sn,
EnvironmentEdgeManager.currentTime());
HbckRegionInfo hbckRegionInfo = regionInfoMap.get(metaLocation.getRegion().getEncodedName());
if (hbckRegionInfo == null) {
regionInfoMap.put(metaLocation.getRegion().getEncodedName(), new HbckRegionInfo(m));
} else {
hbckRegionInfo.setMetaEntry(m);
}
}
return true;
}
private ZKWatcher createZooKeeperWatcher() throws IOException {
return new ZKWatcher(getConf(), "hbase Fsck", new Abortable() {
@Override
public void abort(String why, Throwable e) {
LOG.error(why, e);
System.exit(1);
}
@Override
public boolean isAborted() {
return false;
}
});
}
/**
* Contacts each regionserver and fetches metadata about regions.
* @param regionServerList - the list of region servers to connect to
* @throws IOException if a remote or network exception occurs
*/
void processRegionServers(Collection regionServerList)
throws IOException, InterruptedException {
List workItems = new ArrayList<>(regionServerList.size());
List> workFutures;
// loop to contact each region server in parallel
for (ServerName rsinfo: regionServerList) {
workItems.add(new WorkItemRegion(this, rsinfo, errors, connection));
}
workFutures = executor.invokeAll(workItems);
for(int i=0; i f = workFutures.get(i);
try {
f.get();
} catch(ExecutionException e) {
LOG.warn("Could not process regionserver {}", item.rsinfo.getAddress(),
e.getCause());
}
}
}
/**
* Check consistency of all regions that have been found in previous phases.
*/
private void checkAndFixConsistency()
throws IOException, KeeperException, InterruptedException {
// Divide the checks in two phases. One for default/primary replicas and another
// for the non-primary ones. Keeps code cleaner this way.
List workItems = new ArrayList<>(regionInfoMap.size());
for (java.util.Map.Entry e: regionInfoMap.entrySet()) {
if (e.getValue().getReplicaId() == RegionInfo.DEFAULT_REPLICA_ID) {
workItems.add(new CheckRegionConsistencyWorkItem(e.getKey(), e.getValue()));
}
}
checkRegionConsistencyConcurrently(workItems);
boolean prevHdfsCheck = shouldCheckHdfs();
setCheckHdfs(false); //replicas don't have any hdfs data
// Run a pass over the replicas and fix any assignment issues that exist on the currently
// deployed/undeployed replicas.
List replicaWorkItems = new ArrayList<>(regionInfoMap.size());
for (java.util.Map.Entry e: regionInfoMap.entrySet()) {
if (e.getValue().getReplicaId() != RegionInfo.DEFAULT_REPLICA_ID) {
replicaWorkItems.add(new CheckRegionConsistencyWorkItem(e.getKey(), e.getValue()));
}
}
checkRegionConsistencyConcurrently(replicaWorkItems);
setCheckHdfs(prevHdfsCheck);
// If some regions is skipped during checkRegionConsistencyConcurrently() phase, we might
// not get accurate state of the hbase if continuing. The config here allows users to tune
// the tolerance of number of skipped region.
// TODO: evaluate the consequence to continue the hbck operation without config.
int terminateThreshold = getConf().getInt("hbase.hbck.skipped.regions.limit", 0);
int numOfSkippedRegions = skippedRegions.size();
if (numOfSkippedRegions > 0 && numOfSkippedRegions > terminateThreshold) {
throw new IOException(numOfSkippedRegions
+ " region(s) could not be checked or repaired. See logs for detail.");
}
if (shouldCheckHdfs()) {
checkAndFixTableStates();
}
}
/**
* Check consistency of all regions using mulitple threads concurrently.
*/
private void checkRegionConsistencyConcurrently(
final List workItems)
throws IOException, KeeperException, InterruptedException {
if (workItems.isEmpty()) {
return; // nothing to check
}
List> workFutures = executor.invokeAll(workItems);
for(Future f: workFutures) {
try {
f.get();
} catch(ExecutionException e1) {
LOG.warn("Could not check region consistency " , e1.getCause());
if (e1.getCause() instanceof IOException) {
throw (IOException)e1.getCause();
} else if (e1.getCause() instanceof KeeperException) {
throw (KeeperException)e1.getCause();
} else if (e1.getCause() instanceof InterruptedException) {
throw (InterruptedException)e1.getCause();
} else {
throw new IOException(e1.getCause());
}
}
}
}
class CheckRegionConsistencyWorkItem implements Callable {
private final String key;
private final HbckRegionInfo hbi;
CheckRegionConsistencyWorkItem(String key, HbckRegionInfo hbi) {
this.key = key;
this.hbi = hbi;
}
@Override
public synchronized Void call() throws Exception {
try {
checkRegionConsistency(key, hbi);
} catch (Exception e) {
// If the region is non-META region, skip this region and send warning/error message; if
// the region is META region, we should not continue.
LOG.warn("Unable to complete check or repair the region '" + hbi.getRegionNameAsString()
+ "'.", e);
if (hbi.getHdfsHRI().isMetaRegion()) {
throw e;
}
LOG.warn("Skip region '" + hbi.getRegionNameAsString() + "'");
addSkippedRegion(hbi);
}
return null;
}
}
private void addSkippedRegion(final HbckRegionInfo hbi) {
Set skippedRegionNames = skippedRegions.get(hbi.getTableName());
if (skippedRegionNames == null) {
skippedRegionNames = new HashSet<>();
}
skippedRegionNames.add(hbi.getRegionNameAsString());
skippedRegions.put(hbi.getTableName(), skippedRegionNames);
}
/**
* Check and fix table states, assumes full info available:
* - tableInfos
* - empty tables loaded
*/
private void checkAndFixTableStates() throws IOException {
// first check dangling states
for (Entry entry : tableStates.entrySet()) {
TableName tableName = entry.getKey();
TableState tableState = entry.getValue();
HbckTableInfo tableInfo = tablesInfo.get(tableName);
if (isTableIncluded(tableName)
&& !tableName.isSystemTable()
&& tableInfo == null) {
if (fixMeta) {
MetaTableAccessor.deleteTableState(connection, tableName);
TableState state = MetaTableAccessor.getTableState(connection, tableName);
if (state != null) {
errors.reportError(ERROR_CODE.ORPHAN_TABLE_STATE,
tableName + " unable to delete dangling table state " + tableState);
}
} else if (!checkMetaOnly) {
// dangling table state in meta if checkMetaOnly is false. If checkMetaOnly is
// true, tableInfo will be null as tablesInfo are not polulated for all tables from hdfs
errors.reportError(ERROR_CODE.ORPHAN_TABLE_STATE,
tableName + " has dangling table state " + tableState);
}
}
}
// check that all tables have states
for (TableName tableName : tablesInfo.keySet()) {
if (isTableIncluded(tableName) && !tableStates.containsKey(tableName)) {
if (fixMeta) {
MetaTableAccessor.updateTableState(connection, tableName, TableState.State.ENABLED);
TableState newState = MetaTableAccessor.getTableState(connection, tableName);
if (newState == null) {
errors.reportError(ERROR_CODE.NO_TABLE_STATE,
"Unable to change state for table " + tableName + " in meta ");
}
} else {
errors.reportError(ERROR_CODE.NO_TABLE_STATE,
tableName + " has no state in meta ");
}
}
}
}
private void preCheckPermission() throws IOException {
if (shouldIgnorePreCheckPermission()) {
return;
}
Path hbaseDir = FSUtils.getRootDir(getConf());
FileSystem fs = hbaseDir.getFileSystem(getConf());
UserProvider userProvider = UserProvider.instantiate(getConf());
UserGroupInformation ugi = userProvider.getCurrent().getUGI();
FileStatus[] files = fs.listStatus(hbaseDir);
for (FileStatus file : files) {
try {
fs.access(file.getPath(), FsAction.WRITE);
} catch (AccessControlException ace) {
LOG.warn("Got AccessDeniedException when preCheckPermission ", ace);
errors.reportError(ERROR_CODE.WRONG_USAGE, "Current user " + ugi.getUserName()
+ " does not have write perms to " + file.getPath()
+ ". Please rerun hbck as hdfs user " + file.getOwner());
throw ace;
}
}
}
/**
* Deletes region from meta table
*/
private void deleteMetaRegion(HbckRegionInfo hi) throws IOException {
deleteMetaRegion(hi.getMetaEntry().getRegionName());
}
/**
* Deletes region from meta table
*/
private void deleteMetaRegion(byte[] metaKey) throws IOException {
Delete d = new Delete(metaKey);
meta.delete(d);
LOG.info("Deleted " + Bytes.toString(metaKey) + " from META" );
}
/**
* Reset the split parent region info in meta table
*/
private void resetSplitParent(HbckRegionInfo hi) throws IOException {
RowMutations mutations = new RowMutations(hi.getMetaEntry().getRegionName());
Delete d = new Delete(hi.getMetaEntry().getRegionName());
d.addColumn(HConstants.CATALOG_FAMILY, HConstants.SPLITA_QUALIFIER);
d.addColumn(HConstants.CATALOG_FAMILY, HConstants.SPLITB_QUALIFIER);
mutations.add(d);
RegionInfo hri = RegionInfoBuilder.newBuilder(hi.getMetaEntry())
.setOffline(false)
.setSplit(false)
.build();
Put p = MetaTableAccessor.makePutFromRegionInfo(hri, EnvironmentEdgeManager.currentTime());
mutations.add(p);
meta.mutateRow(mutations);
LOG.info("Reset split parent " + hi.getMetaEntry().getRegionNameAsString() + " in META");
}
/**
* This backwards-compatibility wrapper for permanently offlining a region
* that should not be alive. If the region server does not support the
* "offline" method, it will use the closest unassign method instead. This
* will basically work until one attempts to disable or delete the affected
* table. The problem has to do with in-memory only master state, so
* restarting the HMaster or failing over to another should fix this.
*/
void offline(byte[] regionName) throws IOException {
String regionString = Bytes.toStringBinary(regionName);
if (!rsSupportsOffline) {
LOG.warn(
"Using unassign region " + regionString + " instead of using offline method, you should" +
" restart HMaster after these repairs");
admin.unassign(regionName, true);
return;
}
// first time we assume the rs's supports #offline.
try {
LOG.info("Offlining region " + regionString);
admin.offline(regionName);
} catch (IOException ioe) {
String notFoundMsg = "java.lang.NoSuchMethodException: " +
"org.apache.hadoop.hbase.master.HMaster.offline([B)";
if (ioe.getMessage().contains(notFoundMsg)) {
LOG.warn("Using unassign region " + regionString +
" instead of using offline method, you should" +
" restart HMaster after these repairs");
rsSupportsOffline = false; // in the future just use unassign
admin.unassign(regionName, true);
return;
}
throw ioe;
}
}
/**
* Attempts to undeploy a region from a region server based in information in
* META. Any operations that modify the file system should make sure that
* its corresponding region is not deployed to prevent data races.
*
* A separate call is required to update the master in-memory region state
* kept in the AssignementManager. Because disable uses this state instead of
* that found in META, we can't seem to cleanly disable/delete tables that
* have been hbck fixed. When used on a version of HBase that does not have
* the offline ipc call exposed on the master (<0.90.5, <0.92.0) a master
* restart or failover may be required.
*/
void closeRegion(HbckRegionInfo hi) throws IOException, InterruptedException {
if (hi.getMetaEntry() == null && hi.getHdfsEntry() == null) {
undeployRegions(hi);
return;
}
// get assignment info and hregioninfo from meta.
Get get = new Get(hi.getRegionName());
get.addColumn(HConstants.CATALOG_FAMILY, HConstants.REGIONINFO_QUALIFIER);
get.addColumn(HConstants.CATALOG_FAMILY, HConstants.SERVER_QUALIFIER);
get.addColumn(HConstants.CATALOG_FAMILY, HConstants.STARTCODE_QUALIFIER);
// also get the locations of the replicas to close if the primary region is being closed
if (hi.getReplicaId() == RegionInfo.DEFAULT_REPLICA_ID) {
int numReplicas = admin.getTableDescriptor(hi.getTableName()).getRegionReplication();
for (int i = 0; i < numReplicas; i++) {
get.addColumn(HConstants.CATALOG_FAMILY, MetaTableAccessor.getServerColumn(i));
get.addColumn(HConstants.CATALOG_FAMILY, MetaTableAccessor.getStartCodeColumn(i));
}
}
Result r = meta.get(get);
RegionLocations rl = MetaTableAccessor.getRegionLocations(r);
if (rl == null) {
LOG.warn("Unable to close region " + hi.getRegionNameAsString() +
" since meta does not have handle to reach it");
return;
}
for (HRegionLocation h : rl.getRegionLocations()) {
ServerName serverName = h.getServerName();
if (serverName == null) {
errors.reportError("Unable to close region "
+ hi.getRegionNameAsString() + " because meta does not "
+ "have handle to reach it.");
continue;
}
RegionInfo hri = h.getRegionInfo();
if (hri == null) {
LOG.warn("Unable to close region " + hi.getRegionNameAsString()
+ " because hbase:meta had invalid or missing "
+ HConstants.CATALOG_FAMILY_STR + ":"
+ Bytes.toString(HConstants.REGIONINFO_QUALIFIER)
+ " qualifier value.");
continue;
}
// close the region -- close files and remove assignment
HBaseFsckRepair.closeRegionSilentlyAndWait(connection, serverName, hri);
}
}
private void undeployRegions(HbckRegionInfo hi) throws IOException, InterruptedException {
undeployRegionsForHbi(hi);
// undeploy replicas of the region (but only if the method is invoked for the primary)
if (hi.getReplicaId() != RegionInfo.DEFAULT_REPLICA_ID) {
return;
}
int numReplicas = admin.getDescriptor(hi.getTableName()).getRegionReplication();
for (int i = 1; i < numReplicas; i++) {
if (hi.getPrimaryHRIForDeployedReplica() == null) continue;
RegionInfo hri = RegionReplicaUtil.getRegionInfoForReplica(
hi.getPrimaryHRIForDeployedReplica(), i);
HbckRegionInfo h = regionInfoMap.get(hri.getEncodedName());
if (h != null) {
undeployRegionsForHbi(h);
//set skip checks; we undeployed it, and we don't want to evaluate this anymore
//in consistency checks
h.setSkipChecks(true);
}
}
}
private void undeployRegionsForHbi(HbckRegionInfo hi) throws IOException, InterruptedException {
for (HbckRegionInfo.OnlineEntry rse : hi.getOnlineEntries()) {
LOG.debug("Undeploy region " + rse.getRegionInfo() + " from " + rse.getServerName());
try {
HBaseFsckRepair
.closeRegionSilentlyAndWait(connection, rse.getServerName(), rse.getRegionInfo());
offline(rse.getRegionInfo().getRegionName());
} catch (IOException ioe) {
LOG.warn("Got exception when attempting to offline region "
+ Bytes.toString(rse.getRegionInfo().getRegionName()), ioe);
}
}
}
private void tryAssignmentRepair(HbckRegionInfo hbi, String msg) throws IOException,
KeeperException, InterruptedException {
// If we are trying to fix the errors
if (shouldFixAssignments()) {
errors.print(msg);
undeployRegions(hbi);
setShouldRerun();
RegionInfo hri = hbi.getHdfsHRI();
if (hri == null) {
hri = hbi.getMetaEntry();
}
HBaseFsckRepair.fixUnassigned(admin, hri);
HBaseFsckRepair.waitUntilAssigned(admin, hri);
// also assign replicas if needed (do it only when this call operates on a primary replica)
if (hbi.getReplicaId() != RegionInfo.DEFAULT_REPLICA_ID) return;
int replicationCount = admin.getTableDescriptor(hri.getTable()).getRegionReplication();
for (int i = 1; i < replicationCount; i++) {
hri = RegionReplicaUtil.getRegionInfoForReplica(hri, i);
HbckRegionInfo h = regionInfoMap.get(hri.getEncodedName());
if (h != null) {
undeployRegions(h);
//set skip checks; we undeploy & deploy it; we don't want to evaluate this hbi anymore
//in consistency checks
h.setSkipChecks(true);
}
HBaseFsckRepair.fixUnassigned(admin, hri);
HBaseFsckRepair.waitUntilAssigned(admin, hri);
}
}
}
/**
* Check a single region for consistency and correct deployment.
*/
private void checkRegionConsistency(final String key, final HbckRegionInfo hbi)
throws IOException, KeeperException, InterruptedException {
if (hbi.isSkipChecks()) return;
String descriptiveName = hbi.toString();
boolean inMeta = hbi.getMetaEntry() != null;
// In case not checking HDFS, assume the region is on HDFS
boolean inHdfs = !shouldCheckHdfs() || hbi.getHdfsRegionDir() != null;
boolean hasMetaAssignment = inMeta && hbi.getMetaEntry().regionServer != null;
boolean isDeployed = !hbi.getDeployedOn().isEmpty();
boolean isMultiplyDeployed = hbi.getDeployedOn().size() > 1;
boolean deploymentMatchesMeta =
hasMetaAssignment && isDeployed && !isMultiplyDeployed &&
hbi.getMetaEntry().regionServer.equals(hbi.getDeployedOn().get(0));
boolean splitParent =
inMeta && hbi.getMetaEntry().isSplit() && hbi.getMetaEntry().isOffline();
boolean shouldBeDeployed = inMeta && !isTableDisabled(hbi.getMetaEntry().getTable());
boolean recentlyModified = inHdfs &&
hbi.getModTime() + timelag > EnvironmentEdgeManager.currentTime();
// ========== First the healthy cases =============
if (hbi.containsOnlyHdfsEdits()) {
return;
}
if (inMeta && inHdfs && isDeployed && deploymentMatchesMeta && shouldBeDeployed) {
return;
} else if (inMeta && inHdfs && !shouldBeDeployed && !isDeployed) {
LOG.info("Region " + descriptiveName + " is in META, and in a disabled " +
"tabled that is not deployed");
return;
} else if (recentlyModified) {
LOG.warn("Region " + descriptiveName + " was recently modified -- skipping");
return;
}
// ========== Cases where the region is not in hbase:meta =============
else if (!inMeta && !inHdfs && !isDeployed) {
// We shouldn't have record of this region at all then!
assert false : "Entry for region with no data";
} else if (!inMeta && !inHdfs && isDeployed) {
errors.reportError(ERROR_CODE.NOT_IN_META_HDFS, "Region "
+ descriptiveName + ", key=" + key + ", not on HDFS or in hbase:meta but " +
"deployed on " + Joiner.on(", ").join(hbi.getDeployedOn()));
if (shouldFixAssignments()) {
undeployRegions(hbi);
}
} else if (!inMeta && inHdfs && !isDeployed) {
if (hbi.isMerged()) {
// This region has already been merged, the remaining hdfs file will be
// cleaned by CatalogJanitor later
hbi.setSkipChecks(true);
LOG.info("Region " + descriptiveName
+ " got merge recently, its file(s) will be cleaned by CatalogJanitor later");
return;
}
errors.reportError(ERROR_CODE.NOT_IN_META_OR_DEPLOYED, "Region "
+ descriptiveName + " on HDFS, but not listed in hbase:meta " +
"or deployed on any region server");
// restore region consistency of an adopted orphan
if (shouldFixMeta()) {
if (!hbi.isHdfsRegioninfoPresent()) {
LOG.error("Region " + hbi.getHdfsHRI() + " could have been repaired"
+ " in table integrity repair phase if -fixHdfsOrphans was" +
" used.");
return;
}
RegionInfo hri = hbi.getHdfsHRI();
HbckTableInfo tableInfo = tablesInfo.get(hri.getTable());
for (RegionInfo region : tableInfo.getRegionsFromMeta(this.regionInfoMap)) {
if (Bytes.compareTo(region.getStartKey(), hri.getStartKey()) <= 0
&& (region.getEndKey().length == 0 || Bytes.compareTo(region.getEndKey(),
hri.getEndKey()) >= 0)
&& Bytes.compareTo(region.getStartKey(), hri.getEndKey()) <= 0) {
if(region.isSplit() || region.isOffline()) continue;
Path regionDir = hbi.getHdfsRegionDir();
FileSystem fs = regionDir.getFileSystem(getConf());
List familyDirs = FSUtils.getFamilyDirs(fs, regionDir);
for (Path familyDir : familyDirs) {
List referenceFilePaths = FSUtils.getReferenceFilePaths(fs, familyDir);
for (Path referenceFilePath : referenceFilePaths) {
Path parentRegionDir =
StoreFileInfo.getReferredToFile(referenceFilePath).getParent().getParent();
if (parentRegionDir.toString().endsWith(region.getEncodedName())) {
LOG.warn(hri + " start and stop keys are in the range of " + region
+ ". The region might not be cleaned up from hdfs when region " + region
+ " split failed. Hence deleting from hdfs.");
HRegionFileSystem.deleteRegionFromFileSystem(getConf(), fs,
regionDir.getParent(), hri);
return;
}
}
}
}
}
LOG.info("Patching hbase:meta with .regioninfo: " + hbi.getHdfsHRI());
int numReplicas = admin.getTableDescriptor(hbi.getTableName()).getRegionReplication();
HBaseFsckRepair.fixMetaHoleOnlineAndAddReplicas(getConf(), hbi.getHdfsHRI(),
admin.getClusterMetrics(EnumSet.of(Option.LIVE_SERVERS))
.getLiveServerMetrics().keySet(), numReplicas);
tryAssignmentRepair(hbi, "Trying to reassign region...");
}
} else if (!inMeta && inHdfs && isDeployed) {
errors.reportError(ERROR_CODE.NOT_IN_META, "Region " + descriptiveName
+ " not in META, but deployed on " + Joiner.on(", ").join(hbi.getDeployedOn()));
debugLsr(hbi.getHdfsRegionDir());
if (hbi.getReplicaId() != RegionInfo.DEFAULT_REPLICA_ID) {
// for replicas, this means that we should undeploy the region (we would have
// gone over the primaries and fixed meta holes in first phase under
// checkAndFixConsistency; we shouldn't get the condition !inMeta at
// this stage unless unwanted replica)
if (shouldFixAssignments()) {
undeployRegionsForHbi(hbi);
}
}
if (shouldFixMeta() && hbi.getReplicaId() == RegionInfo.DEFAULT_REPLICA_ID) {
if (!hbi.isHdfsRegioninfoPresent()) {
LOG.error("This should have been repaired in table integrity repair phase");
return;
}
LOG.info("Patching hbase:meta with with .regioninfo: " + hbi.getHdfsHRI());
int numReplicas = admin.getTableDescriptor(hbi.getTableName()).getRegionReplication();
HBaseFsckRepair.fixMetaHoleOnlineAndAddReplicas(getConf(), hbi.getHdfsHRI(),
admin.getClusterMetrics(EnumSet.of(Option.LIVE_SERVERS))
.getLiveServerMetrics().keySet(), numReplicas);
tryAssignmentRepair(hbi, "Trying to fix unassigned region...");
}
// ========== Cases where the region is in hbase:meta =============
} else if (inMeta && inHdfs && !isDeployed && splitParent) {
// check whether this is an actual error, or just transient state where parent
// is not cleaned
if (hbi.getMetaEntry().splitA != null && hbi.getMetaEntry().splitB != null) {
// check that split daughters are there
HbckRegionInfo infoA = this.regionInfoMap.get(hbi.getMetaEntry().splitA.getEncodedName());
HbckRegionInfo infoB = this.regionInfoMap.get(hbi.getMetaEntry().splitB.getEncodedName());
if (infoA != null && infoB != null) {
// we already processed or will process daughters. Move on, nothing to see here.
hbi.setSkipChecks(true);
return;
}
}
// For Replica region, we need to do a similar check. If replica is not split successfully,
// error is going to be reported against primary daughter region.
if (hbi.getReplicaId() != RegionInfo.DEFAULT_REPLICA_ID) {
LOG.info("Region " + descriptiveName + " is a split parent in META, in HDFS, "
+ "and not deployed on any region server. This may be transient.");
hbi.setSkipChecks(true);
return;
}
errors.reportError(ERROR_CODE.LINGERING_SPLIT_PARENT, "Region "
+ descriptiveName + " is a split parent in META, in HDFS, "
+ "and not deployed on any region server. This could be transient, "
+ "consider to run the catalog janitor first!");
if (shouldFixSplitParents()) {
setShouldRerun();
resetSplitParent(hbi);
}
} else if (inMeta && !inHdfs && !isDeployed) {
errors.reportError(ERROR_CODE.NOT_IN_HDFS_OR_DEPLOYED, "Region "
+ descriptiveName + " found in META, but not in HDFS "
+ "or deployed on any region server.");
if (shouldFixMeta()) {
deleteMetaRegion(hbi);
}
} else if (inMeta && !inHdfs && isDeployed) {
errors.reportError(ERROR_CODE.NOT_IN_HDFS, "Region " + descriptiveName
+ " found in META, but not in HDFS, " +
"and deployed on " + Joiner.on(", ").join(hbi.getDeployedOn()));
// We treat HDFS as ground truth. Any information in meta is transient
// and equivalent data can be regenerated. So, lets unassign and remove
// these problems from META.
if (shouldFixAssignments()) {
errors.print("Trying to fix unassigned region...");
undeployRegions(hbi);
}
if (shouldFixMeta()) {
// wait for it to complete
deleteMetaRegion(hbi);
}
} else if (inMeta && inHdfs && !isDeployed && shouldBeDeployed) {
errors.reportError(ERROR_CODE.NOT_DEPLOYED, "Region " + descriptiveName
+ " not deployed on any region server.");
tryAssignmentRepair(hbi, "Trying to fix unassigned region...");
} else if (inMeta && inHdfs && isDeployed && !shouldBeDeployed) {
errors.reportError(ERROR_CODE.SHOULD_NOT_BE_DEPLOYED,
"Region " + descriptiveName + " should not be deployed according " +
"to META, but is deployed on " + Joiner.on(", ").join(hbi.getDeployedOn()));
if (shouldFixAssignments()) {
errors.print("Trying to close the region " + descriptiveName);
setShouldRerun();
HBaseFsckRepair.fixMultiAssignment(connection, hbi.getMetaEntry(), hbi.getDeployedOn());
}
} else if (inMeta && inHdfs && isMultiplyDeployed) {
errors.reportError(ERROR_CODE.MULTI_DEPLOYED, "Region " + descriptiveName
+ " is listed in hbase:meta on region server " + hbi.getMetaEntry().regionServer
+ " but is multiply assigned to region servers " +
Joiner.on(", ").join(hbi.getDeployedOn()));
// If we are trying to fix the errors
if (shouldFixAssignments()) {
errors.print("Trying to fix assignment error...");
setShouldRerun();
HBaseFsckRepair.fixMultiAssignment(connection, hbi.getMetaEntry(), hbi.getDeployedOn());
}
} else if (inMeta && inHdfs && isDeployed && !deploymentMatchesMeta) {
errors.reportError(ERROR_CODE.SERVER_DOES_NOT_MATCH_META, "Region "
+ descriptiveName + " listed in hbase:meta on region server " +
hbi.getMetaEntry().regionServer + " but found on region server " +
hbi.getDeployedOn().get(0));
// If we are trying to fix the errors
if (shouldFixAssignments()) {
errors.print("Trying to fix assignment error...");
setShouldRerun();
HBaseFsckRepair.fixMultiAssignment(connection, hbi.getMetaEntry(), hbi.getDeployedOn());
HBaseFsckRepair.waitUntilAssigned(admin, hbi.getHdfsHRI());
}
} else {
errors.reportError(ERROR_CODE.UNKNOWN, "Region " + descriptiveName +
" is in an unforeseen state:" +
" inMeta=" + inMeta +
" inHdfs=" + inHdfs +
" isDeployed=" + isDeployed +
" isMultiplyDeployed=" + isMultiplyDeployed +
" deploymentMatchesMeta=" + deploymentMatchesMeta +
" shouldBeDeployed=" + shouldBeDeployed);
}
}
/**
* Checks tables integrity. Goes over all regions and scans the tables.
* Collects all the pieces for each table and checks if there are missing,
* repeated or overlapping ones.
* @throws IOException
*/
SortedMap checkIntegrity() throws IOException {
tablesInfo = new TreeMap<>();
LOG.debug("There are " + regionInfoMap.size() + " region info entries");
for (HbckRegionInfo hbi : regionInfoMap.values()) {
// Check only valid, working regions
if (hbi.getMetaEntry() == null) {
// this assumes that consistency check has run loadMetaEntry
Path p = hbi.getHdfsRegionDir();
if (p == null) {
errors.report("No regioninfo in Meta or HDFS. " + hbi);
}
// TODO test.
continue;
}
if (hbi.getMetaEntry().regionServer == null) {
errors.detail("Skipping region because no region server: " + hbi);
continue;
}
if (hbi.getMetaEntry().isOffline()) {
errors.detail("Skipping region because it is offline: " + hbi);
continue;
}
if (hbi.containsOnlyHdfsEdits()) {
errors.detail("Skipping region because it only contains edits" + hbi);
continue;
}
// Missing regionDir or over-deployment is checked elsewhere. Include
// these cases in modTInfo, so we can evaluate those regions as part of
// the region chain in META
//if (hbi.foundRegionDir == null) continue;
//if (hbi.deployedOn.size() != 1) continue;
if (hbi.getDeployedOn().isEmpty()) {
continue;
}
// We should be safe here
TableName tableName = hbi.getMetaEntry().getTable();
HbckTableInfo modTInfo = tablesInfo.get(tableName);
if (modTInfo == null) {
modTInfo = new HbckTableInfo(tableName, this);
}
for (ServerName server : hbi.getDeployedOn()) {
modTInfo.addServer(server);
}
if (!hbi.isSkipChecks()) {
modTInfo.addRegionInfo(hbi);
}
tablesInfo.put(tableName, modTInfo);
}
loadTableInfosForTablesWithNoRegion();
logParallelMerge();
for (HbckTableInfo tInfo : tablesInfo.values()) {
TableIntegrityErrorHandler handler = tInfo.new IntegrityFixSuggester(tInfo, errors);
if (!tInfo.checkRegionChain(handler)) {
errors.report("Found inconsistency in table " + tInfo.getName());
}
}
return tablesInfo;
}
/** Loads table info's for tables that may not have been included, since there are no
* regions reported for the table, but table dir is there in hdfs
*/
private void loadTableInfosForTablesWithNoRegion() throws IOException {
Map allTables = new FSTableDescriptors(getConf()).getAll();
for (TableDescriptor htd : allTables.values()) {
if (checkMetaOnly && !htd.isMetaTable()) {
continue;
}
TableName tableName = htd.getTableName();
if (isTableIncluded(tableName) && !tablesInfo.containsKey(tableName)) {
HbckTableInfo tableInfo = new HbckTableInfo(tableName, this);
tableInfo.htds.add(htd);
tablesInfo.put(htd.getTableName(), tableInfo);
}
}
}
/**
* Merge hdfs data by moving from contained HbckRegionInfo into targetRegionDir.
* @return number of file move fixes done to merge regions.
*/
public int mergeRegionDirs(Path targetRegionDir, HbckRegionInfo contained) throws IOException {
int fileMoves = 0;
String thread = Thread.currentThread().getName();
LOG.debug("[" + thread + "] Contained region dir after close and pause");
debugLsr(contained.getHdfsRegionDir());
// rename the contained into the container.
FileSystem fs = targetRegionDir.getFileSystem(getConf());
FileStatus[] dirs = null;
try {
dirs = fs.listStatus(contained.getHdfsRegionDir());
} catch (FileNotFoundException fnfe) {
// region we are attempting to merge in is not present! Since this is a merge, there is
// no harm skipping this region if it does not exist.
if (!fs.exists(contained.getHdfsRegionDir())) {
LOG.warn("[" + thread + "] HDFS region dir " + contained.getHdfsRegionDir()
+ " is missing. Assuming already sidelined or moved.");
} else {
sidelineRegionDir(fs, contained);
}
return fileMoves;
}
if (dirs == null) {
if (!fs.exists(contained.getHdfsRegionDir())) {
LOG.warn("[" + thread + "] HDFS region dir " + contained.getHdfsRegionDir()
+ " already sidelined.");
} else {
sidelineRegionDir(fs, contained);
}
return fileMoves;
}
for (FileStatus cf : dirs) {
Path src = cf.getPath();
Path dst = new Path(targetRegionDir, src.getName());
if (src.getName().equals(HRegionFileSystem.REGION_INFO_FILE)) {
// do not copy the old .regioninfo file.
continue;
}
if (src.getName().equals(HConstants.HREGION_OLDLOGDIR_NAME)) {
// do not copy the .oldlogs files
continue;
}
LOG.info("[" + thread + "] Moving files from " + src + " into containing region " + dst);
// FileSystem.rename is inconsistent with directories -- if the
// dst (foo/a) exists and is a dir, and the src (foo/b) is a dir,
// it moves the src into the dst dir resulting in (foo/a/b). If
// the dst does not exist, and the src a dir, src becomes dst. (foo/b)
for (FileStatus hfile : fs.listStatus(src)) {
boolean success = fs.rename(hfile.getPath(), dst);
if (success) {
fileMoves++;
}
}
LOG.debug("[" + thread + "] Sideline directory contents:");
debugLsr(targetRegionDir);
}
// if all success.
sidelineRegionDir(fs, contained);
LOG.info("[" + thread + "] Sidelined region dir "+ contained.getHdfsRegionDir() + " into " +
getSidelineDir());
debugLsr(contained.getHdfsRegionDir());
return fileMoves;
}
static class WorkItemOverlapMerge implements Callable {
private TableIntegrityErrorHandler handler;
Collection overlapgroup;
WorkItemOverlapMerge(Collection overlapgroup,
TableIntegrityErrorHandler handler) {
this.handler = handler;
this.overlapgroup = overlapgroup;
}
@Override
public Void call() throws Exception {
handler.handleOverlapGroup(overlapgroup);
return null;
}
};
/**
* Return a list of user-space table names whose metadata have not been
* modified in the last few milliseconds specified by timelag
* if any of the REGIONINFO_QUALIFIER, SERVER_QUALIFIER, STARTCODE_QUALIFIER,
* SPLITA_QUALIFIER, SPLITB_QUALIFIER have not changed in the last
* milliseconds specified by timelag, then the table is a candidate to be returned.
* @return tables that have not been modified recently
* @throws IOException if an error is encountered
*/
TableDescriptor[] getTables(AtomicInteger numSkipped) {
List tableNames = new ArrayList<>();
long now = EnvironmentEdgeManager.currentTime();
for (HbckRegionInfo hbi : regionInfoMap.values()) {
HbckRegionInfo.MetaEntry info = hbi.getMetaEntry();
// if the start key is zero, then we have found the first region of a table.
// pick only those tables that were not modified in the last few milliseconds.
if (info != null && info.getStartKey().length == 0 && !info.isMetaRegion()) {
if (info.modTime + timelag < now) {
tableNames.add(info.getTable());
} else {
numSkipped.incrementAndGet(); // one more in-flux table
}
}
}
return getTableDescriptors(tableNames);
}
TableDescriptor[] getTableDescriptors(List tableNames) {
LOG.info("getTableDescriptors == tableNames => " + tableNames);
try (Connection conn = ConnectionFactory.createConnection(getConf());
Admin admin = conn.getAdmin()) {
List tds = admin.listTableDescriptors(tableNames);
return tds.toArray(new TableDescriptor[tds.size()]);
} catch (IOException e) {
LOG.debug("Exception getting table descriptors", e);
}
return new TableDescriptor[0];
}
/**
* Gets the entry in regionInfo corresponding to the the given encoded
* region name. If the region has not been seen yet, a new entry is added
* and returned.
*/
private synchronized HbckRegionInfo getOrCreateInfo(String name) {
HbckRegionInfo hbi = regionInfoMap.get(name);
if (hbi == null) {
hbi = new HbckRegionInfo(null);
regionInfoMap.put(name, hbi);
}
return hbi;
}
private void checkAndFixReplication() throws ReplicationException {
ReplicationChecker checker = new ReplicationChecker(getConf(), zkw, errors);
checker.checkUnDeletedQueues();
if (checker.hasUnDeletedQueues() && this.fixReplication) {
checker.fixUnDeletedQueues();
setShouldRerun();
}
}
/**
* Check values in regionInfo for hbase:meta
* Check if zero or more than one regions with hbase:meta are found.
* If there are inconsistencies (i.e. zero or more than one regions
* pretend to be holding the hbase:meta) try to fix that and report an error.
* @throws IOException from HBaseFsckRepair functions
* @throws KeeperException
* @throws InterruptedException
*/
boolean checkMetaRegion() throws IOException, KeeperException, InterruptedException {
Map metaRegions = new HashMap<>();
for (HbckRegionInfo value : regionInfoMap.values()) {
if (value.getMetaEntry() != null && value.getMetaEntry().isMetaRegion()) {
metaRegions.put(value.getReplicaId(), value);
}
}
int metaReplication = admin.getTableDescriptor(TableName.META_TABLE_NAME)
.getRegionReplication();
boolean noProblem = true;
// There will be always entries in regionInfoMap corresponding to hbase:meta & its replicas
// Check the deployed servers. It should be exactly one server for each replica.
for (int i = 0; i < metaReplication; i++) {
HbckRegionInfo metaHbckRegionInfo = metaRegions.remove(i);
List servers = new ArrayList<>();
if (metaHbckRegionInfo != null) {
servers = metaHbckRegionInfo.getDeployedOn();
}
if (servers.size() != 1) {
noProblem = false;
if (servers.isEmpty()) {
assignMetaReplica(i);
} else if (servers.size() > 1) {
errors
.reportError(ERROR_CODE.MULTI_META_REGION, "hbase:meta, replicaId " +
metaHbckRegionInfo.getReplicaId() + " is found on more than one region.");
if (shouldFixAssignments()) {
errors.print("Trying to fix a problem with hbase:meta, replicaId " +
metaHbckRegionInfo.getReplicaId() + "..");
setShouldRerun();
// try fix it (treat is a dupe assignment)
HBaseFsckRepair
.fixMultiAssignment(connection, metaHbckRegionInfo.getMetaEntry(), servers);
}
}
}
}
// unassign whatever is remaining in metaRegions. They are excess replicas.
for (Map.Entry entry : metaRegions.entrySet()) {
noProblem = false;
errors.reportError(ERROR_CODE.SHOULD_NOT_BE_DEPLOYED,
"hbase:meta replicas are deployed in excess. Configured " + metaReplication +
", deployed " + metaRegions.size());
if (shouldFixAssignments()) {
errors.print("Trying to undeploy excess replica, replicaId: " + entry.getKey() +
" of hbase:meta..");
setShouldRerun();
unassignMetaReplica(entry.getValue());
}
}
// if noProblem is false, rerun hbck with hopefully fixed META
// if noProblem is true, no errors, so continue normally
return noProblem;
}
private void unassignMetaReplica(HbckRegionInfo hi)
throws IOException, InterruptedException, KeeperException {
undeployRegions(hi);
ZKUtil
.deleteNode(zkw, zkw.getZNodePaths().getZNodeForReplica(hi.getMetaEntry().getReplicaId()));
}
private void assignMetaReplica(int replicaId)
throws IOException, KeeperException, InterruptedException {
errors.reportError(ERROR_CODE.NO_META_REGION, "hbase:meta, replicaId " +
replicaId +" is not found on any region.");
if (shouldFixAssignments()) {
errors.print("Trying to fix a problem with hbase:meta..");
setShouldRerun();
// try to fix it (treat it as unassigned region)
RegionInfo h = RegionReplicaUtil.getRegionInfoForReplica(
RegionInfoBuilder.FIRST_META_REGIONINFO, replicaId);
HBaseFsckRepair.fixUnassigned(admin, h);
HBaseFsckRepair.waitUntilAssigned(admin, h);
}
}
/**
* Scan hbase:meta, adding all regions found to the regionInfo map.
* @throws IOException if an error is encountered
*/
boolean loadMetaEntries() throws IOException {
MetaTableAccessor.Visitor visitor = new MetaTableAccessor.Visitor() {
int countRecord = 1;
// comparator to sort KeyValues with latest modtime
final Comparator comp = new Comparator() {
@Override
public int compare(Cell k1, Cell k2) {
return Long.compare(k1.getTimestamp(), k2.getTimestamp());
}
};
@Override
public boolean visit(Result result) throws IOException {
try {
// record the latest modification of this META record
long ts = Collections.max(result.listCells(), comp).getTimestamp();
RegionLocations rl = MetaTableAccessor.getRegionLocations(result);
if (rl == null) {
emptyRegionInfoQualifiers.add(result);
errors.reportError(ERROR_CODE.EMPTY_META_CELL,
"Empty REGIONINFO_QUALIFIER found in hbase:meta");
return true;
}
ServerName sn = null;
if (rl.getRegionLocation(RegionInfo.DEFAULT_REPLICA_ID) == null ||
rl.getRegionLocation(RegionInfo.DEFAULT_REPLICA_ID).getRegionInfo() == null) {
emptyRegionInfoQualifiers.add(result);
errors.reportError(ERROR_CODE.EMPTY_META_CELL,
"Empty REGIONINFO_QUALIFIER found in hbase:meta");
return true;
}
RegionInfo hri = rl.getRegionLocation(RegionInfo.DEFAULT_REPLICA_ID).getRegionInfo();
if (!(isTableIncluded(hri.getTable())
|| hri.isMetaRegion())) {
return true;
}
PairOfSameType daughters = MetaTableAccessor.getDaughterRegions(result);
for (HRegionLocation h : rl.getRegionLocations()) {
if (h == null || h.getRegionInfo() == null) {
continue;
}
sn = h.getServerName();
hri = h.getRegionInfo();
HbckRegionInfo.MetaEntry m = null;
if (hri.getReplicaId() == RegionInfo.DEFAULT_REPLICA_ID) {
m = new HbckRegionInfo.MetaEntry(hri, sn, ts, daughters.getFirst(),
daughters.getSecond());
} else {
m = new HbckRegionInfo.MetaEntry(hri, sn, ts, null, null);
}
HbckRegionInfo previous = regionInfoMap.get(hri.getEncodedName());
if (previous == null) {
regionInfoMap.put(hri.getEncodedName(), new HbckRegionInfo(m));
} else if (previous.getMetaEntry() == null) {
previous.setMetaEntry(m);
} else {
throw new IOException("Two entries in hbase:meta are same " + previous);
}
}
List mergeParents = MetaTableAccessor.getMergeRegions(result.rawCells());
if (mergeParents != null) {
for (RegionInfo mergeRegion : mergeParents) {
if (mergeRegion != null) {
// This region is already being merged
HbckRegionInfo hbInfo = getOrCreateInfo(mergeRegion.getEncodedName());
hbInfo.setMerged(true);
}
}
}
// show proof of progress to the user, once for every 100 records.
if (countRecord % 100 == 0) {
errors.progress();
}
countRecord++;
return true;
} catch (RuntimeException e) {
LOG.error("Result=" + result);
throw e;
}
}
};
if (!checkMetaOnly) {
// Scan hbase:meta to pick up user regions
MetaTableAccessor.fullScanRegions(connection, visitor);
}
errors.print("");
return true;
}
/**
* Prints summary of all tables found on the system.
*/
private void printTableSummary(SortedMap tablesInfo) {
StringBuilder sb = new StringBuilder();
int numOfSkippedRegions;
errors.print("Summary:");
for (HbckTableInfo tInfo : tablesInfo.values()) {
numOfSkippedRegions = (skippedRegions.containsKey(tInfo.getName())) ?
skippedRegions.get(tInfo.getName()).size() : 0;
if (errors.tableHasErrors(tInfo)) {
errors.print("Table " + tInfo.getName() + " is inconsistent.");
} else if (numOfSkippedRegions > 0){
errors.print("Table " + tInfo.getName() + " is okay (with "
+ numOfSkippedRegions + " skipped regions).");
}
else {
errors.print("Table " + tInfo.getName() + " is okay.");
}
errors.print(" Number of regions: " + tInfo.getNumRegions());
if (numOfSkippedRegions > 0) {
Set skippedRegionStrings = skippedRegions.get(tInfo.getName());
System.out.println(" Number of skipped regions: " + numOfSkippedRegions);
System.out.println(" List of skipped regions:");
for(String sr : skippedRegionStrings) {
System.out.println(" " + sr);
}
}
sb.setLength(0); // clear out existing buffer, if any.
sb.append(" Deployed on: ");
for (ServerName server : tInfo.deployedOn) {
sb.append(" " + server.toString());
}
errors.print(sb.toString());
}
}
static HbckErrorReporter getErrorReporter(final Configuration conf)
throws ClassNotFoundException {
Class reporter =
conf.getClass("hbasefsck.errorreporter", PrintingErrorReporter.class,
HbckErrorReporter.class);
return ReflectionUtils.newInstance(reporter, conf);
}
static class PrintingErrorReporter implements HbckErrorReporter {
public int errorCount = 0;
private int showProgress;
// How frequently calls to progress() will create output
private static final int progressThreshold = 100;
Set errorTables = new HashSet<>();
// for use by unit tests to verify which errors were discovered
private ArrayList errorList = new ArrayList<>();
@Override
public void clear() {
errorTables.clear();
errorList.clear();
errorCount = 0;
}
@Override
public synchronized void reportError(ERROR_CODE errorCode, String message) {
if (errorCode == ERROR_CODE.WRONG_USAGE) {
System.err.println(message);
return;
}
errorList.add(errorCode);
if (!summary) {
System.out.println("ERROR: " + message);
}
errorCount++;
showProgress = 0;
}
@Override
public synchronized void reportError(ERROR_CODE errorCode, String message,
HbckTableInfo table) {
errorTables.add(table);
reportError(errorCode, message);
}
@Override
public synchronized void reportError(ERROR_CODE errorCode, String message, HbckTableInfo table,
HbckRegionInfo info) {
errorTables.add(table);
String reference = "(region " + info.getRegionNameAsString() + ")";
reportError(errorCode, reference + " " + message);
}
@Override
public synchronized void reportError(ERROR_CODE errorCode, String message, HbckTableInfo table,
HbckRegionInfo info1, HbckRegionInfo info2) {
errorTables.add(table);
String reference = "(regions " + info1.getRegionNameAsString()
+ " and " + info2.getRegionNameAsString() + ")";
reportError(errorCode, reference + " " + message);
}
@Override
public synchronized void reportError(String message) {
reportError(ERROR_CODE.UNKNOWN, message);
}
/**
* Report error information, but do not increment the error count. Intended for cases
* where the actual error would have been reported previously.
* @param message
*/
@Override
public synchronized void report(String message) {
if (! summary) {
System.out.println("ERROR: " + message);
}
showProgress = 0;
}
@Override
public synchronized int summarize() {
System.out.println(Integer.toString(errorCount) +
" inconsistencies detected.");
if (errorCount == 0) {
System.out.println("Status: OK");
return 0;
} else {
System.out.println("Status: INCONSISTENT");
return -1;
}
}
@Override
public ArrayList getErrorList() {
return errorList;
}
@Override
public synchronized void print(String message) {
if (!summary) {
System.out.println(message);
}
}
@Override
public boolean tableHasErrors(HbckTableInfo table) {
return errorTables.contains(table);
}
@Override
public void resetErrors() {
errorCount = 0;
}
@Override
public synchronized void detail(String message) {
if (details) {
System.out.println(message);
}
showProgress = 0;
}
@Override
public synchronized void progress() {
if (showProgress++ == progressThreshold) {
if (!summary) {
System.out.print(".");
}
showProgress = 0;
}
}
}
/**
* Contact a region server and get all information from it
*/
static class WorkItemRegion implements Callable {
private final HBaseFsck hbck;
private final ServerName rsinfo;
private final HbckErrorReporter errors;
private final ClusterConnection connection;
WorkItemRegion(HBaseFsck hbck, ServerName info, HbckErrorReporter errors,
ClusterConnection connection) {
this.hbck = hbck;
this.rsinfo = info;
this.errors = errors;
this.connection = connection;
}
@Override
public synchronized Void call() throws IOException {
errors.progress();
try {
BlockingInterface server = connection.getAdmin(rsinfo);
// list all online regions from this region server
List regions = ProtobufUtil.getOnlineRegions(server);
regions = filterRegions(regions);
if (details) {
errors.detail("RegionServer: " + rsinfo.getServerName() +
" number of regions: " + regions.size());
for (RegionInfo rinfo: regions) {
errors.detail(" " + rinfo.getRegionNameAsString() +
" id: " + rinfo.getRegionId() +
" encoded_name: " + rinfo.getEncodedName() +
" start: " + Bytes.toStringBinary(rinfo.getStartKey()) +
" end: " + Bytes.toStringBinary(rinfo.getEndKey()));
}
}
// check to see if the existence of this region matches the region in META
for (RegionInfo r : regions) {
HbckRegionInfo hbi = hbck.getOrCreateInfo(r.getEncodedName());
hbi.addServer(r, rsinfo);
}
} catch (IOException e) { // unable to connect to the region server.
errors.reportError(ERROR_CODE.RS_CONNECT_FAILURE, "RegionServer: " + rsinfo.getServerName() +
" Unable to fetch region information. " + e);
throw e;
}
return null;
}
private List filterRegions(List regions) {
List ret = Lists.newArrayList();
for (RegionInfo hri : regions) {
if (hri.isMetaRegion() || (!hbck.checkMetaOnly
&& hbck.isTableIncluded(hri.getTable()))) {
ret.add(hri);
}
}
return ret;
}
}
/**
* Contact hdfs and get all information about specified table directory into
* regioninfo list.
*/
class WorkItemHdfsDir implements Callable {
private FileStatus tableDir;
private HbckErrorReporter errors;
private FileSystem fs;
WorkItemHdfsDir(FileSystem fs, HbckErrorReporter errors, FileStatus status) {
this.fs = fs;
this.tableDir = status;
this.errors = errors;
}
@Override
public synchronized Void call() throws InterruptedException, ExecutionException {
final Vector exceptions = new Vector<>();
try {
final FileStatus[] regionDirs = fs.listStatus(tableDir.getPath());
final List> futures = new ArrayList<>(regionDirs.length);
for (final FileStatus regionDir : regionDirs) {
errors.progress();
final String encodedName = regionDir.getPath().getName();
// ignore directories that aren't hexadecimal
if (!encodedName.toLowerCase(Locale.ROOT).matches("[0-9a-f]+")) {
continue;
}
if (!exceptions.isEmpty()) {
break;
}
futures.add(executor.submit(new Runnable() {
@Override
public void run() {
try {
LOG.debug("Loading region info from hdfs:"+ regionDir.getPath());
Path regioninfoFile = new Path(regionDir.getPath(), HRegionFileSystem.REGION_INFO_FILE);
boolean regioninfoFileExists = fs.exists(regioninfoFile);
if (!regioninfoFileExists) {
// As tables become larger it is more and more likely that by the time you
// reach a given region that it will be gone due to region splits/merges.
if (!fs.exists(regionDir.getPath())) {
LOG.warn("By the time we tried to process this region dir it was already gone: "
+ regionDir.getPath());
return;
}
}
HbckRegionInfo hbi = HBaseFsck.this.getOrCreateInfo(encodedName);
HbckRegionInfo.HdfsEntry he = new HbckRegionInfo.HdfsEntry();
synchronized (hbi) {
if (hbi.getHdfsRegionDir() != null) {
errors.print("Directory " + encodedName + " duplicate??" +
hbi.getHdfsRegionDir());
}
he.regionDir = regionDir.getPath();
he.regionDirModTime = regionDir.getModificationTime();
he.hdfsRegioninfoFilePresent = regioninfoFileExists;
// we add to orphan list when we attempt to read .regioninfo
// Set a flag if this region contains only edits
// This is special case if a region is left after split
he.hdfsOnlyEdits = true;
FileStatus[] subDirs = fs.listStatus(regionDir.getPath());
Path ePath = WALSplitUtil.getRegionDirRecoveredEditsDir(regionDir.getPath());
for (FileStatus subDir : subDirs) {
errors.progress();
String sdName = subDir.getPath().getName();
if (!sdName.startsWith(".") && !sdName.equals(ePath.getName())) {
he.hdfsOnlyEdits = false;
break;
}
}
hbi.setHdfsEntry(he);
}
} catch (Exception e) {
LOG.error("Could not load region dir", e);
exceptions.add(e);
}
}
}));
}
// Ensure all pending tasks are complete (or that we run into an exception)
for (Future f : futures) {
if (!exceptions.isEmpty()) {
break;
}
try {
f.get();
} catch (ExecutionException e) {
LOG.error("Unexpected exec exception! Should've been caught already. (Bug?)", e);
// Shouldn't happen, we already logged/caught any exceptions in the Runnable
};
}
} catch (IOException e) {
LOG.error("Cannot execute WorkItemHdfsDir for " + tableDir, e);
exceptions.add(e);
} finally {
if (!exceptions.isEmpty()) {
errors.reportError(ERROR_CODE.RS_CONNECT_FAILURE, "Table Directory: "
+ tableDir.getPath().getName()
+ " Unable to fetch all HDFS region information. ");
// Just throw the first exception as an indication something bad happened
// Don't need to propagate all the exceptions, we already logged them all anyway
throw new ExecutionException("First exception in WorkItemHdfsDir", exceptions.firstElement());
}
}
return null;
}
}
/**
* Contact hdfs and get all information about specified table directory into
* regioninfo list.
*/
static class WorkItemHdfsRegionInfo implements Callable {
private HbckRegionInfo hbi;
private HBaseFsck hbck;
private HbckErrorReporter errors;
WorkItemHdfsRegionInfo(HbckRegionInfo hbi, HBaseFsck hbck, HbckErrorReporter errors) {
this.hbi = hbi;
this.hbck = hbck;
this.errors = errors;
}
@Override
public synchronized Void call() throws IOException {
// only load entries that haven't been loaded yet.
if (hbi.getHdfsHRI() == null) {
try {
errors.progress();
hbi.loadHdfsRegioninfo(hbck.getConf());
} catch (IOException ioe) {
String msg = "Orphan region in HDFS: Unable to load .regioninfo from table "
+ hbi.getTableName() + " in hdfs dir "
+ hbi.getHdfsRegionDir()
+ "! It may be an invalid format or version file. Treating as "
+ "an orphaned regiondir.";
errors.reportError(ERROR_CODE.ORPHAN_HDFS_REGION, msg);
try {
hbck.debugLsr(hbi.getHdfsRegionDir());
} catch (IOException ioe2) {
LOG.error("Unable to read directory " + hbi.getHdfsRegionDir(), ioe2);
throw ioe2;
}
hbck.orphanHdfsDirs.add(hbi);
throw ioe;
}
}
return null;
}
};
/**
* Display the full report from fsck. This displays all live and dead region
* servers, and all known regions.
*/
public static void setDisplayFullReport() {
details = true;
}
public static boolean shouldDisplayFullReport() {
return details;
}
/**
* Set exclusive mode.
*/
public static void setForceExclusive() {
forceExclusive = true;
}
/**
* Only one instance of hbck can modify HBase at a time.
*/
public boolean isExclusive() {
return fixAny || forceExclusive;
}
/**
* Set summary mode.
* Print only summary of the tables and status (OK or INCONSISTENT)
*/
static void setSummary() {
summary = true;
}
/**
* Set hbase:meta check mode.
* Print only info about hbase:meta table deployment/state
*/
void setCheckMetaOnly() {
checkMetaOnly = true;
}
/**
* Set region boundaries check mode.
*/
void setRegionBoundariesCheck() {
checkRegionBoundaries = true;
}
/**
* Set replication fix mode.
*/
public void setFixReplication(boolean shouldFix) {
fixReplication = shouldFix;
fixAny |= shouldFix;
}
public void setCleanReplicationBarrier(boolean shouldClean) {
cleanReplicationBarrier = shouldClean;
}
/**
* Check if we should rerun fsck again. This checks if we've tried to
* fix something and we should rerun fsck tool again.
* Display the full report from fsck. This displays all live and dead
* region servers, and all known regions.
*/
void setShouldRerun() {
rerun = true;
}
public boolean shouldRerun() {
return rerun;
}
/**
* Fix inconsistencies found by fsck. This should try to fix errors (if any)
* found by fsck utility.
*/
public void setFixAssignments(boolean shouldFix) {
fixAssignments = shouldFix;
fixAny |= shouldFix;
}
boolean shouldFixAssignments() {
return fixAssignments;
}
public void setFixMeta(boolean shouldFix) {
fixMeta = shouldFix;
fixAny |= shouldFix;
}
boolean shouldFixMeta() {
return fixMeta;
}
public void setFixEmptyMetaCells(boolean shouldFix) {
fixEmptyMetaCells = shouldFix;
fixAny |= shouldFix;
}
boolean shouldFixEmptyMetaCells() {
return fixEmptyMetaCells;
}
public void setCheckHdfs(boolean checking) {
checkHdfs = checking;
}
boolean shouldCheckHdfs() {
return checkHdfs;
}
public void setFixHdfsHoles(boolean shouldFix) {
fixHdfsHoles = shouldFix;
fixAny |= shouldFix;
}
boolean shouldFixHdfsHoles() {
return fixHdfsHoles;
}
public void setFixTableOrphans(boolean shouldFix) {
fixTableOrphans = shouldFix;
fixAny |= shouldFix;
}
boolean shouldFixTableOrphans() {
return fixTableOrphans;
}
public void setFixHdfsOverlaps(boolean shouldFix) {
fixHdfsOverlaps = shouldFix;
fixAny |= shouldFix;
}
boolean shouldFixHdfsOverlaps() {
return fixHdfsOverlaps;
}
public void setFixHdfsOrphans(boolean shouldFix) {
fixHdfsOrphans = shouldFix;
fixAny |= shouldFix;
}
boolean shouldFixHdfsOrphans() {
return fixHdfsOrphans;
}
public void setFixVersionFile(boolean shouldFix) {
fixVersionFile = shouldFix;
fixAny |= shouldFix;
}
public boolean shouldFixVersionFile() {
return fixVersionFile;
}
public void setSidelineBigOverlaps(boolean sbo) {
this.sidelineBigOverlaps = sbo;
}
public boolean shouldSidelineBigOverlaps() {
return sidelineBigOverlaps;
}
public void setFixSplitParents(boolean shouldFix) {
fixSplitParents = shouldFix;
fixAny |= shouldFix;
}
public void setRemoveParents(boolean shouldFix) {
removeParents = shouldFix;
fixAny |= shouldFix;
}
boolean shouldFixSplitParents() {
return fixSplitParents;
}
boolean shouldRemoveParents() {
return removeParents;
}
public void setFixReferenceFiles(boolean shouldFix) {
fixReferenceFiles = shouldFix;
fixAny |= shouldFix;
}
boolean shouldFixReferenceFiles() {
return fixReferenceFiles;
}
public void setFixHFileLinks(boolean shouldFix) {
fixHFileLinks = shouldFix;
fixAny |= shouldFix;
}
boolean shouldFixHFileLinks() {
return fixHFileLinks;
}
public boolean shouldIgnorePreCheckPermission() {
return !fixAny || ignorePreCheckPermission;
}
public void setIgnorePreCheckPermission(boolean ignorePreCheckPermission) {
this.ignorePreCheckPermission = ignorePreCheckPermission;
}
/**
* @param mm maximum number of regions to merge into a single region.
*/
public void setMaxMerge(int mm) {
this.maxMerge = mm;
}
public int getMaxMerge() {
return maxMerge;
}
public void setMaxOverlapsToSideline(int mo) {
this.maxOverlapsToSideline = mo;
}
public int getMaxOverlapsToSideline() {
return maxOverlapsToSideline;
}
/**
* Only check/fix tables specified by the list,
* Empty list means all tables are included.
*/
boolean isTableIncluded(TableName table) {
return (tablesIncluded.isEmpty()) || tablesIncluded.contains(table);
}
public void includeTable(TableName table) {
tablesIncluded.add(table);
}
Set getIncludedTables() {
return new HashSet<>(tablesIncluded);
}
/**
* We are interested in only those tables that have not changed their state in
* hbase:meta during the last few seconds specified by hbase.admin.fsck.timelag
* @param seconds - the time in seconds
*/
public void setTimeLag(long seconds) {
timelag = seconds * 1000; // convert to milliseconds
}
/**
*
* @param sidelineDir - HDFS path to sideline data
*/
public void setSidelineDir(String sidelineDir) {
this.sidelineDir = new Path(sidelineDir);
}
protected HFileCorruptionChecker createHFileCorruptionChecker(boolean sidelineCorruptHFiles) throws IOException {
return new HFileCorruptionChecker(getConf(), executor, sidelineCorruptHFiles);
}
public HFileCorruptionChecker getHFilecorruptionChecker() {
return hfcc;
}
public void setHFileCorruptionChecker(HFileCorruptionChecker hfcc) {
this.hfcc = hfcc;
}
public void setRetCode(int code) {
this.retcode = code;
}
public int getRetCode() {
return retcode;
}
protected HBaseFsck printUsageAndExit() {
StringWriter sw = new StringWriter(2048);
PrintWriter out = new PrintWriter(sw);
out.println("");
out.println("-----------------------------------------------------------------------");
out.println("NOTE: As of HBase version 2.0, the hbck tool is significantly changed.");
out.println("In general, all Read-Only options are supported and can be be used");
out.println("safely. Most -fix/ -repair options are NOT supported. Please see usage");
out.println("below for details on which options are not supported.");
out.println("-----------------------------------------------------------------------");
out.println("");
out.println("Usage: fsck [opts] {only tables}");
out.println(" where [opts] are:");
out.println(" -help Display help options (this)");
out.println(" -details Display full report of all regions.");
out.println(" -timelag Process only regions that " +
" have not experienced any metadata updates in the last " +
" seconds.");
out.println(" -sleepBeforeRerun Sleep this many seconds" +
" before checking if the fix worked if run with -fix");
out.println(" -summary Print only summary of the tables and status.");
out.println(" -metaonly Only check the state of the hbase:meta table.");
out.println(" -sidelineDir When fixing region overlaps, allow at most regions to merge. (n=" + DEFAULT_MAX_MERGE +" by default)");
out.println(" -sidelineBigOverlaps When fixing region overlaps, allow to sideline big overlaps");
out.println(" -maxOverlapsToSideline When fixing region overlaps, allow at most regions to sideline per group. (n=" + DEFAULT_OVERLAPS_TO_SIDELINE +" by default)");
out.println(" -fixSplitParents Try to force offline split parents to be online.");
out.println(" -removeParents Try to offline and sideline lingering parents and keep daughter regions.");
out.println(" -fixEmptyMetaCells Try to fix hbase:meta entries not referencing any region"
+ " (empty REGIONINFO_QUALIFIER rows)");
out.println("");
out.println(" UNSUPPORTED Metadata Repair shortcuts");
out.println(" -repair Shortcut for -fixAssignments -fixMeta -fixHdfsHoles " +
"-fixHdfsOrphans -fixHdfsOverlaps -fixVersionFile -sidelineBigOverlaps -fixReferenceFiles" +
"-fixHFileLinks");
out.println(" -repairHoles Shortcut for -fixAssignments -fixMeta -fixHdfsHoles");
out.println("");
out.println(" Replication options");
out.println(" -fixReplication Deletes replication queues for removed peers");
out.println(" -cleanReplicationBrarier [tableName] clean the replication barriers " +
"of a specified table, tableName is required");
out.flush();
errors.reportError(ERROR_CODE.WRONG_USAGE, sw.toString());
setRetCode(-2);
return this;
}
/**
* Main program
*
* @param args
* @throws Exception
*/
public static void main(String[] args) throws Exception {
// create a fsck object
Configuration conf = HBaseConfiguration.create();
Path hbasedir = FSUtils.getRootDir(conf);
URI defaultFs = hbasedir.getFileSystem(conf).getUri();
FSUtils.setFsDefault(conf, new Path(defaultFs));
int ret = ToolRunner.run(new HBaseFsckTool(conf), args);
System.exit(ret);
}
/**
* This is a Tool wrapper that gathers -Dxxx=yyy configuration settings from the command line.
*/
static class HBaseFsckTool extends Configured implements Tool {
HBaseFsckTool(Configuration conf) { super(conf); }
@Override
public int run(String[] args) throws Exception {
HBaseFsck hbck = new HBaseFsck(getConf());
hbck.exec(hbck.executor, args);
hbck.close();
return hbck.getRetCode();
}
};
public HBaseFsck exec(ExecutorService exec, String[] args)
throws KeeperException, IOException, InterruptedException, ReplicationException {
long sleepBeforeRerun = DEFAULT_SLEEP_BEFORE_RERUN;
boolean checkCorruptHFiles = false;
boolean sidelineCorruptHFiles = false;
// Process command-line args.
for (int i = 0; i < args.length; i++) {
String cmd = args[i];
if (cmd.equals("-help") || cmd.equals("-h")) {
return printUsageAndExit();
} else if (cmd.equals("-details")) {
setDisplayFullReport();
} else if (cmd.equals("-exclusive")) {
setForceExclusive();
} else if (cmd.equals("-timelag")) {
if (i == args.length - 1) {
errors.reportError(ERROR_CODE.WRONG_USAGE, "HBaseFsck: -timelag needs a value.");
return printUsageAndExit();
}
try {
long timelag = Long.parseLong(args[++i]);
setTimeLag(timelag);
} catch (NumberFormatException e) {
errors.reportError(ERROR_CODE.WRONG_USAGE, "-timelag needs a numeric value.");
return printUsageAndExit();
}
} else if (cmd.equals("-sleepBeforeRerun")) {
if (i == args.length - 1) {
errors.reportError(ERROR_CODE.WRONG_USAGE,
"HBaseFsck: -sleepBeforeRerun needs a value.");
return printUsageAndExit();
}
try {
sleepBeforeRerun = Long.parseLong(args[++i]);
} catch (NumberFormatException e) {
errors.reportError(ERROR_CODE.WRONG_USAGE, "-sleepBeforeRerun needs a numeric value.");
return printUsageAndExit();
}
} else if (cmd.equals("-sidelineDir")) {
if (i == args.length - 1) {
errors.reportError(ERROR_CODE.WRONG_USAGE, "HBaseFsck: -sidelineDir needs a value.");
return printUsageAndExit();
}
setSidelineDir(args[++i]);
} else if (cmd.equals("-fix")) {
errors.reportError(ERROR_CODE.WRONG_USAGE,
"This option is deprecated, please use -fixAssignments instead.");
setFixAssignments(true);
} else if (cmd.equals("-fixAssignments")) {
setFixAssignments(true);
} else if (cmd.equals("-fixMeta")) {
setFixMeta(true);
} else if (cmd.equals("-noHdfsChecking")) {
setCheckHdfs(false);
} else if (cmd.equals("-fixHdfsHoles")) {
setFixHdfsHoles(true);
} else if (cmd.equals("-fixHdfsOrphans")) {
setFixHdfsOrphans(true);
} else if (cmd.equals("-fixTableOrphans")) {
setFixTableOrphans(true);
} else if (cmd.equals("-fixHdfsOverlaps")) {
setFixHdfsOverlaps(true);
} else if (cmd.equals("-fixVersionFile")) {
setFixVersionFile(true);
} else if (cmd.equals("-sidelineBigOverlaps")) {
setSidelineBigOverlaps(true);
} else if (cmd.equals("-fixSplitParents")) {
setFixSplitParents(true);
} else if (cmd.equals("-removeParents")) {
setRemoveParents(true);
} else if (cmd.equals("-ignorePreCheckPermission")) {
setIgnorePreCheckPermission(true);
} else if (cmd.equals("-checkCorruptHFiles")) {
checkCorruptHFiles = true;
} else if (cmd.equals("-sidelineCorruptHFiles")) {
sidelineCorruptHFiles = true;
} else if (cmd.equals("-fixReferenceFiles")) {
setFixReferenceFiles(true);
} else if (cmd.equals("-fixHFileLinks")) {
setFixHFileLinks(true);
} else if (cmd.equals("-fixEmptyMetaCells")) {
setFixEmptyMetaCells(true);
} else if (cmd.equals("-repair")) {
// this attempts to merge overlapping hdfs regions, needs testing
// under load
setFixHdfsHoles(true);
setFixHdfsOrphans(true);
setFixMeta(true);
setFixAssignments(true);
setFixHdfsOverlaps(true);
setFixVersionFile(true);
setSidelineBigOverlaps(true);
setFixSplitParents(false);
setCheckHdfs(true);
setFixReferenceFiles(true);
setFixHFileLinks(true);
} else if (cmd.equals("-repairHoles")) {
// this will make all missing hdfs regions available but may lose data
setFixHdfsHoles(true);
setFixHdfsOrphans(false);
setFixMeta(true);
setFixAssignments(true);
setFixHdfsOverlaps(false);
setSidelineBigOverlaps(false);
setFixSplitParents(false);
setCheckHdfs(true);
} else if (cmd.equals("-maxOverlapsToSideline")) {
if (i == args.length - 1) {
errors.reportError(ERROR_CODE.WRONG_USAGE,
"-maxOverlapsToSideline needs a numeric value argument.");
return printUsageAndExit();
}
try {
int maxOverlapsToSideline = Integer.parseInt(args[++i]);
setMaxOverlapsToSideline(maxOverlapsToSideline);
} catch (NumberFormatException e) {
errors.reportError(ERROR_CODE.WRONG_USAGE,
"-maxOverlapsToSideline needs a numeric value argument.");
return printUsageAndExit();
}
} else if (cmd.equals("-maxMerge")) {
if (i == args.length - 1) {
errors.reportError(ERROR_CODE.WRONG_USAGE,
"-maxMerge needs a numeric value argument.");
return printUsageAndExit();
}
try {
int maxMerge = Integer.parseInt(args[++i]);
setMaxMerge(maxMerge);
} catch (NumberFormatException e) {
errors.reportError(ERROR_CODE.WRONG_USAGE,
"-maxMerge needs a numeric value argument.");
return printUsageAndExit();
}
} else if (cmd.equals("-summary")) {
setSummary();
} else if (cmd.equals("-metaonly")) {
setCheckMetaOnly();
} else if (cmd.equals("-boundaries")) {
setRegionBoundariesCheck();
} else if (cmd.equals("-fixReplication")) {
setFixReplication(true);
} else if (cmd.equals("-cleanReplicationBarrier")) {
setCleanReplicationBarrier(true);
if(args[++i].startsWith("-")){
printUsageAndExit();
}
setCleanReplicationBarrierTable(args[i]);
} else if (cmd.startsWith("-")) {
errors.reportError(ERROR_CODE.WRONG_USAGE, "Unrecognized option:" + cmd);
return printUsageAndExit();
} else {
includeTable(TableName.valueOf(cmd));
errors.print("Allow checking/fixes for table: " + cmd);
}
}
errors.print("HBaseFsck command line options: " + StringUtils.join(args, " "));
// pre-check current user has FS write permission or not
try {
preCheckPermission();
} catch (IOException ioe) {
Runtime.getRuntime().exit(-1);
}
// do the real work of hbck
connect();
// after connecting to server above, we have server version
// check if unsupported option is specified based on server version
if (!isOptionsSupported(args)) {
return printUsageAndExit();
}
try {
// if corrupt file mode is on, first fix them since they may be opened later
if (checkCorruptHFiles || sidelineCorruptHFiles) {
LOG.info("Checking all hfiles for corruption");
HFileCorruptionChecker hfcc = createHFileCorruptionChecker(sidelineCorruptHFiles);
setHFileCorruptionChecker(hfcc); // so we can get result
Collection tables = getIncludedTables();
Collection tableDirs = new ArrayList<>();
Path rootdir = FSUtils.getRootDir(getConf());
if (tables.size() > 0) {
for (TableName t : tables) {
tableDirs.add(FSUtils.getTableDir(rootdir, t));
}
} else {
tableDirs = FSUtils.getTableDirs(FSUtils.getCurrentFileSystem(getConf()), rootdir);
}
hfcc.checkTables(tableDirs);
hfcc.report(errors);
}
// check and fix table integrity, region consistency.
int code = onlineHbck();
setRetCode(code);
// If we have changed the HBase state it is better to run hbck again
// to see if we haven't broken something else in the process.
// We run it only once more because otherwise we can easily fall into
// an infinite loop.
if (shouldRerun()) {
try {
LOG.info("Sleeping " + sleepBeforeRerun + "ms before re-checking after fix...");
Thread.sleep(sleepBeforeRerun);
} catch (InterruptedException ie) {
LOG.warn("Interrupted while sleeping");
return this;
}
// Just report
setFixAssignments(false);
setFixMeta(false);
setFixHdfsHoles(false);
setFixHdfsOverlaps(false);
setFixVersionFile(false);
setFixTableOrphans(false);
errors.resetErrors();
code = onlineHbck();
setRetCode(code);
}
} finally {
IOUtils.closeQuietly(this);
}
return this;
}
private boolean isOptionsSupported(String[] args) {
boolean result = true;
String hbaseServerVersion = status.getHBaseVersion();
if (VersionInfo.compareVersion("2.any.any", hbaseServerVersion) < 0) {
// Process command-line args.
for (String arg : args) {
if (unsupportedOptionsInV2.contains(arg)) {
errors.reportError(ERROR_CODE.UNSUPPORTED_OPTION,
"option '" + arg + "' is not " + "supportted!");
result = false;
break;
}
}
}
return result;
}
public void setCleanReplicationBarrierTable(String cleanReplicationBarrierTable) {
this.cleanReplicationBarrierTable = TableName.valueOf(cleanReplicationBarrierTable);
}
public void cleanReplicationBarrier() throws IOException {
if (!cleanReplicationBarrier || cleanReplicationBarrierTable == null) {
return;
}
if (cleanReplicationBarrierTable.isSystemTable()) {
errors.reportError(ERROR_CODE.INVALID_TABLE,
"invalid table: " + cleanReplicationBarrierTable);
return;
}
boolean isGlobalScope = false;
try {
isGlobalScope = admin.getDescriptor(cleanReplicationBarrierTable).hasGlobalReplicationScope();
} catch (TableNotFoundException e) {
LOG.info("we may need to clean some erroneous data due to bugs");
}
if (isGlobalScope) {
errors.reportError(ERROR_CODE.INVALID_TABLE,
"table's replication scope is global: " + cleanReplicationBarrierTable);
return;
}
List regionNames = new ArrayList<>();
Scan barrierScan = new Scan();
barrierScan.setCaching(100);
barrierScan.addFamily(HConstants.REPLICATION_BARRIER_FAMILY);
barrierScan
.withStartRow(MetaTableAccessor.getTableStartRowForMeta(cleanReplicationBarrierTable,
MetaTableAccessor.QueryType.REGION))
.withStopRow(MetaTableAccessor.getTableStopRowForMeta(cleanReplicationBarrierTable,
MetaTableAccessor.QueryType.REGION));
Result result;
try (ResultScanner scanner = meta.getScanner(barrierScan)) {
while ((result = scanner.next()) != null) {
regionNames.add(result.getRow());
}
}
if (regionNames.size() <= 0) {
errors.reportError(ERROR_CODE.INVALID_TABLE,
"there is no barriers of this table: " + cleanReplicationBarrierTable);
return;
}
ReplicationQueueStorage queueStorage =
ReplicationStorageFactory.getReplicationQueueStorage(zkw, getConf());
List peerDescriptions = admin.listReplicationPeers();
if (peerDescriptions != null && peerDescriptions.size() > 0) {
List peers = peerDescriptions.stream()
.filter(peerConfig -> peerConfig.getPeerConfig()
.needToReplicate(cleanReplicationBarrierTable))
.map(peerConfig -> peerConfig.getPeerId()).collect(Collectors.toList());
try {
List batch = new ArrayList<>();
for (String peer : peers) {
for (byte[] regionName : regionNames) {
batch.add(RegionInfo.encodeRegionName(regionName));
if (batch.size() % 100 == 0) {
queueStorage.removeLastSequenceIds(peer, batch);
batch.clear();
}
}
if (batch.size() > 0) {
queueStorage.removeLastSequenceIds(peer, batch);
batch.clear();
}
}
} catch (ReplicationException re) {
throw new IOException(re);
}
}
for (byte[] regionName : regionNames) {
meta.delete(new Delete(regionName).addFamily(HConstants.REPLICATION_BARRIER_FAMILY));
}
setShouldRerun();
}
/**
* ls -r for debugging purposes
*/
void debugLsr(Path p) throws IOException {
debugLsr(getConf(), p, errors);
}
/**
* ls -r for debugging purposes
*/
public static void debugLsr(Configuration conf,
Path p) throws IOException {
debugLsr(conf, p, new PrintingErrorReporter());
}
/**
* ls -r for debugging purposes
*/
public static void debugLsr(Configuration conf,
Path p, HbckErrorReporter errors) throws IOException {
if (!LOG.isDebugEnabled() || p == null) {
return;
}
FileSystem fs = p.getFileSystem(conf);
if (!fs.exists(p)) {
// nothing
return;
}
errors.print(p.toString());
if (fs.isFile(p)) {
return;
}
if (fs.getFileStatus(p).isDirectory()) {
FileStatus[] fss= fs.listStatus(p);
for (FileStatus status : fss) {
debugLsr(conf, status.getPath(), errors);
}
}
}
}
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