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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.hdfs;
import static org.apache.hadoop.hdfs.client.HdfsClientConfigKeys.DFS_CLIENT_CACHE_DROP_BEHIND_READS;
import static org.apache.hadoop.hdfs.client.HdfsClientConfigKeys.DFS_CLIENT_CACHE_DROP_BEHIND_WRITES;
import static org.apache.hadoop.hdfs.client.HdfsClientConfigKeys.DFS_CLIENT_CACHE_READAHEAD;
import static org.apache.hadoop.hdfs.client.HdfsClientConfigKeys.DFS_CLIENT_CONTEXT;
import static org.apache.hadoop.hdfs.client.HdfsClientConfigKeys.DFS_CLIENT_CONTEXT_DEFAULT;
import static org.apache.hadoop.hdfs.client.HdfsClientConfigKeys.DFS_CLIENT_LOCAL_INTERFACES;
import static org.apache.hadoop.hdfs.client.HdfsClientConfigKeys.DFS_CLIENT_SERVER_DEFAULTS_VALIDITY_PERIOD_MS_DEFAULT;
import static org.apache.hadoop.hdfs.client.HdfsClientConfigKeys.DFS_CLIENT_SERVER_DEFAULTS_VALIDITY_PERIOD_MS_KEY;
import static org.apache.hadoop.hdfs.client.HdfsClientConfigKeys.DFS_CLIENT_TEST_DROP_NAMENODE_RESPONSE_NUM_DEFAULT;
import static org.apache.hadoop.hdfs.client.HdfsClientConfigKeys.DFS_CLIENT_TEST_DROP_NAMENODE_RESPONSE_NUM_KEY;
import java.io.DataOutputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.OutputStream;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.net.SocketAddress;
import java.net.URI;
import java.net.UnknownHostException;
import java.util.ArrayList;
import java.util.EnumSet;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Random;
import java.util.concurrent.SynchronousQueue;
import java.util.concurrent.ThreadLocalRandom;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicInteger;
import javax.net.SocketFactory;
import org.apache.hadoop.HadoopIllegalArgumentException;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.crypto.CryptoCodec;
import org.apache.hadoop.crypto.CryptoInputStream;
import org.apache.hadoop.crypto.CryptoOutputStream;
import org.apache.hadoop.crypto.key.KeyProvider;
import org.apache.hadoop.crypto.key.KeyProvider.KeyVersion;
import org.apache.hadoop.crypto.key.KeyProviderTokenIssuer;
import org.apache.hadoop.fs.BlockLocation;
import org.apache.hadoop.fs.CacheFlag;
import org.apache.hadoop.fs.ContentSummary;
import org.apache.hadoop.fs.CreateFlag;
import org.apache.hadoop.fs.FileAlreadyExistsException;
import org.apache.hadoop.fs.FileChecksum;
import org.apache.hadoop.fs.FileEncryptionInfo;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.FsServerDefaults;
import org.apache.hadoop.fs.FsStatus;
import org.apache.hadoop.fs.FsTracer;
import org.apache.hadoop.fs.HdfsBlockLocation;
import org.apache.hadoop.fs.InvalidPathException;
import org.apache.hadoop.fs.MD5MD5CRC32FileChecksum;
import org.apache.hadoop.fs.Options;
import org.apache.hadoop.fs.Options.ChecksumCombineMode;
import org.apache.hadoop.fs.Options.ChecksumOpt;
import org.apache.hadoop.fs.ParentNotDirectoryException;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.PathIsNotEmptyDirectoryException;
import org.apache.hadoop.fs.QuotaUsage;
import org.apache.hadoop.fs.RemoteIterator;
import org.apache.hadoop.fs.StorageType;
import org.apache.hadoop.fs.XAttr;
import org.apache.hadoop.fs.XAttrSetFlag;
import org.apache.hadoop.fs.permission.AclEntry;
import org.apache.hadoop.fs.permission.AclStatus;
import org.apache.hadoop.fs.permission.FsAction;
import org.apache.hadoop.fs.permission.FsCreateModes;
import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.hdfs.NameNodeProxiesClient.ProxyAndInfo;
import org.apache.hadoop.hdfs.client.HdfsClientConfigKeys;
import org.apache.hadoop.hdfs.client.HdfsDataInputStream;
import org.apache.hadoop.hdfs.client.HdfsDataOutputStream;
import org.apache.hadoop.hdfs.client.impl.DfsClientConf;
import org.apache.hadoop.hdfs.client.impl.LeaseRenewer;
import org.apache.hadoop.hdfs.net.Peer;
import org.apache.hadoop.hdfs.protocol.AclException;
import org.apache.hadoop.hdfs.protocol.AddErasureCodingPolicyResponse;
import org.apache.hadoop.hdfs.protocol.BlockStoragePolicy;
import org.apache.hadoop.hdfs.protocol.CacheDirectiveEntry;
import org.apache.hadoop.hdfs.protocol.CacheDirectiveInfo;
import org.apache.hadoop.hdfs.protocol.CacheDirectiveIterator;
import org.apache.hadoop.hdfs.protocol.CachePoolEntry;
import org.apache.hadoop.hdfs.protocol.CachePoolInfo;
import org.apache.hadoop.hdfs.protocol.CachePoolIterator;
import org.apache.hadoop.hdfs.protocol.ClientProtocol;
import org.apache.hadoop.hdfs.protocol.CorruptFileBlocks;
import org.apache.hadoop.hdfs.protocol.DSQuotaExceededException;
import org.apache.hadoop.hdfs.protocol.DatanodeID;
import org.apache.hadoop.hdfs.protocol.DatanodeInfo;
import org.apache.hadoop.hdfs.protocol.DirectoryListing;
import org.apache.hadoop.hdfs.protocol.EncryptionZone;
import org.apache.hadoop.hdfs.protocol.EncryptionZoneIterator;
import org.apache.hadoop.hdfs.protocol.ErasureCodingPolicy;
import org.apache.hadoop.hdfs.protocol.ErasureCodingPolicyInfo;
import org.apache.hadoop.hdfs.protocol.ExtendedBlock;
import org.apache.hadoop.hdfs.protocol.HdfsConstants;
import org.apache.hadoop.hdfs.protocol.HdfsConstants.DatanodeReportType;
import org.apache.hadoop.hdfs.protocol.HdfsConstants.ReencryptAction;
import org.apache.hadoop.hdfs.protocol.HdfsConstants.RollingUpgradeAction;
import org.apache.hadoop.hdfs.protocol.HdfsConstants.SafeModeAction;
import org.apache.hadoop.hdfs.protocol.HdfsFileStatus;
import org.apache.hadoop.hdfs.protocol.HdfsLocatedFileStatus;
import org.apache.hadoop.hdfs.protocol.HdfsPathHandle;
import org.apache.hadoop.hdfs.protocol.LastBlockWithStatus;
import org.apache.hadoop.hdfs.protocol.LocatedBlock;
import org.apache.hadoop.hdfs.protocol.LocatedBlocks;
import org.apache.hadoop.hdfs.protocol.NSQuotaExceededException;
import org.apache.hadoop.hdfs.protocol.OpenFileEntry;
import org.apache.hadoop.hdfs.protocol.OpenFilesIterator;
import org.apache.hadoop.hdfs.protocol.OpenFilesIterator.OpenFilesType;
import org.apache.hadoop.hdfs.protocol.QuotaByStorageTypeExceededException;
import org.apache.hadoop.hdfs.protocol.ReencryptionStatusIterator;
import org.apache.hadoop.hdfs.protocol.RollingUpgradeInfo;
import org.apache.hadoop.hdfs.protocol.SnapshotAccessControlException;
import org.apache.hadoop.hdfs.protocol.SnapshottableDirectoryStatus;
import org.apache.hadoop.hdfs.protocol.UnresolvedPathException;
import org.apache.hadoop.hdfs.protocol.ZoneReencryptionStatus;
import org.apache.hadoop.hdfs.protocol.SnapshotDiffReport;
import org.apache.hadoop.hdfs.protocol.SnapshotDiffReportListing;
import org.apache.hadoop.hdfs.protocol.datatransfer.DataTransferProtoUtil;
import org.apache.hadoop.hdfs.protocol.datatransfer.IOStreamPair;
import org.apache.hadoop.hdfs.protocol.datatransfer.ReplaceDatanodeOnFailure;
import org.apache.hadoop.hdfs.protocol.datatransfer.Sender;
import org.apache.hadoop.hdfs.protocol.datatransfer.TrustedChannelResolver;
import org.apache.hadoop.hdfs.protocol.datatransfer.sasl.DataEncryptionKeyFactory;
import org.apache.hadoop.hdfs.protocol.datatransfer.sasl.DataTransferSaslUtil;
import org.apache.hadoop.hdfs.protocol.datatransfer.sasl.SaslDataTransferClient;
import org.apache.hadoop.hdfs.protocol.proto.DataTransferProtos.BlockOpResponseProto;
import org.apache.hadoop.hdfs.protocolPB.PBHelperClient;
import org.apache.hadoop.hdfs.security.token.block.BlockTokenIdentifier;
import org.apache.hadoop.hdfs.security.token.block.DataEncryptionKey;
import org.apache.hadoop.hdfs.security.token.delegation.DelegationTokenIdentifier;
import org.apache.hadoop.hdfs.server.datanode.CachingStrategy;
import org.apache.hadoop.hdfs.server.namenode.SafeModeException;
import org.apache.hadoop.hdfs.server.protocol.DatanodeStorageReport;
import org.apache.hadoop.hdfs.util.IOUtilsClient;
import org.apache.hadoop.io.EnumSetWritable;
import org.apache.hadoop.io.IOUtils;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.io.retry.LossyRetryInvocationHandler;
import org.apache.hadoop.ipc.RPC;
import org.apache.hadoop.ipc.RemoteException;
import org.apache.hadoop.ipc.RetriableException;
import org.apache.hadoop.ipc.RpcNoSuchMethodException;
import org.apache.hadoop.net.DNS;
import org.apache.hadoop.net.NetUtils;
import org.apache.hadoop.security.AccessControlException;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.hadoop.security.token.SecretManager.InvalidToken;
import org.apache.hadoop.security.token.Token;
import org.apache.hadoop.security.token.TokenRenewer;
import org.apache.hadoop.util.Daemon;
import org.apache.hadoop.util.DataChecksum;
import org.apache.hadoop.util.DataChecksum.Type;
import org.apache.hadoop.util.Progressable;
import org.apache.hadoop.util.Time;
import org.apache.htrace.core.TraceScope;
import org.apache.htrace.core.Tracer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Joiner;
import com.google.common.base.Preconditions;
import com.google.common.collect.Lists;
import com.google.common.net.InetAddresses;
/********************************************************
* DFSClient can connect to a Hadoop Filesystem and
* perform basic file tasks. It uses the ClientProtocol
* to communicate with a NameNode daemon, and connects
* directly to DataNodes to read/write block data.
*
* Hadoop DFS users should obtain an instance of
* DistributedFileSystem, which uses DFSClient to handle
* filesystem tasks.
*
********************************************************/
@InterfaceAudience.Private
public class DFSClient implements java.io.Closeable, RemotePeerFactory,
DataEncryptionKeyFactory, KeyProviderTokenIssuer {
public static final Logger LOG = LoggerFactory.getLogger(DFSClient.class);
private final Configuration conf;
private final Tracer tracer;
private final DfsClientConf dfsClientConf;
final ClientProtocol namenode;
/* The service used for delegation tokens */
private Text dtService;
final UserGroupInformation ugi;
volatile boolean clientRunning = true;
volatile long lastLeaseRenewal;
private volatile FsServerDefaults serverDefaults;
private volatile long serverDefaultsLastUpdate;
final String clientName;
final SocketFactory socketFactory;
final ReplaceDatanodeOnFailure dtpReplaceDatanodeOnFailure;
final short dtpReplaceDatanodeOnFailureReplication;
private final FileSystem.Statistics stats;
private final URI namenodeUri;
private final Random r = new Random();
private SocketAddress[] localInterfaceAddrs;
private DataEncryptionKey encryptionKey;
final SaslDataTransferClient saslClient;
private final CachingStrategy defaultReadCachingStrategy;
private final CachingStrategy defaultWriteCachingStrategy;
private final ClientContext clientContext;
private static final DFSHedgedReadMetrics HEDGED_READ_METRIC =
new DFSHedgedReadMetrics();
private static ThreadPoolExecutor HEDGED_READ_THREAD_POOL;
private static volatile ThreadPoolExecutor STRIPED_READ_THREAD_POOL;
private final int smallBufferSize;
private final long serverDefaultsValidityPeriod;
public DfsClientConf getConf() {
return dfsClientConf;
}
Configuration getConfiguration() {
return conf;
}
/**
* A map from file names to {@link DFSOutputStream} objects
* that are currently being written by this client.
* Note that a file can only be written by a single client.
*/
private final Map filesBeingWritten = new HashMap<>();
/**
* Same as this(NameNode.getNNAddress(conf), conf);
* @see #DFSClient(InetSocketAddress, Configuration)
* @deprecated Deprecated at 0.21
*/
@Deprecated
public DFSClient(Configuration conf) throws IOException {
this(DFSUtilClient.getNNAddress(conf), conf);
}
public DFSClient(InetSocketAddress address, Configuration conf)
throws IOException {
this(DFSUtilClient.getNNUri(address), conf);
}
/**
* Same as this(nameNodeUri, conf, null);
* @see #DFSClient(URI, Configuration, FileSystem.Statistics)
*/
public DFSClient(URI nameNodeUri, Configuration conf) throws IOException {
this(nameNodeUri, conf, null);
}
/**
* Same as this(nameNodeUri, null, conf, stats);
* @see #DFSClient(URI, ClientProtocol, Configuration, FileSystem.Statistics)
*/
public DFSClient(URI nameNodeUri, Configuration conf,
FileSystem.Statistics stats) throws IOException {
this(nameNodeUri, null, conf, stats);
}
/**
* Create a new DFSClient connected to the given nameNodeUri or rpcNamenode.
* If HA is enabled and a positive value is set for
* {@link HdfsClientConfigKeys#DFS_CLIENT_TEST_DROP_NAMENODE_RESPONSE_NUM_KEY}
* in the configuration, the DFSClient will use
* {@link LossyRetryInvocationHandler} as its RetryInvocationHandler.
* Otherwise one of nameNodeUri or rpcNamenode must be null.
*/
@VisibleForTesting
public DFSClient(URI nameNodeUri, ClientProtocol rpcNamenode,
Configuration conf, FileSystem.Statistics stats) throws IOException {
// Copy only the required DFSClient configuration
this.tracer = FsTracer.get(conf);
this.dfsClientConf = new DfsClientConf(conf);
this.conf = conf;
this.stats = stats;
this.socketFactory = NetUtils.getSocketFactory(conf, ClientProtocol.class);
this.dtpReplaceDatanodeOnFailure = ReplaceDatanodeOnFailure.get(conf);
this.smallBufferSize = DFSUtilClient.getSmallBufferSize(conf);
this.dtpReplaceDatanodeOnFailureReplication = (short) conf
.getInt(HdfsClientConfigKeys.BlockWrite.ReplaceDatanodeOnFailure.
MIN_REPLICATION,
HdfsClientConfigKeys.BlockWrite.ReplaceDatanodeOnFailure.
MIN_REPLICATION_DEFAULT);
if (LOG.isDebugEnabled()) {
LOG.debug(
"Sets " + HdfsClientConfigKeys.BlockWrite.ReplaceDatanodeOnFailure.
MIN_REPLICATION + " to "
+ dtpReplaceDatanodeOnFailureReplication);
}
this.ugi = UserGroupInformation.getCurrentUser();
this.namenodeUri = nameNodeUri;
this.clientName = "DFSClient_" + dfsClientConf.getTaskId() + "_" +
ThreadLocalRandom.current().nextInt() + "_" +
Thread.currentThread().getId();
int numResponseToDrop = conf.getInt(
DFS_CLIENT_TEST_DROP_NAMENODE_RESPONSE_NUM_KEY,
DFS_CLIENT_TEST_DROP_NAMENODE_RESPONSE_NUM_DEFAULT);
ProxyAndInfo proxyInfo = null;
AtomicBoolean nnFallbackToSimpleAuth = new AtomicBoolean(false);
if (numResponseToDrop > 0) {
// This case is used for testing.
LOG.warn(DFS_CLIENT_TEST_DROP_NAMENODE_RESPONSE_NUM_KEY
+ " is set to " + numResponseToDrop
+ ", this hacked client will proactively drop responses");
proxyInfo = NameNodeProxiesClient.createProxyWithLossyRetryHandler(conf,
nameNodeUri, ClientProtocol.class, numResponseToDrop,
nnFallbackToSimpleAuth);
}
if (proxyInfo != null) {
this.dtService = proxyInfo.getDelegationTokenService();
this.namenode = proxyInfo.getProxy();
} else if (rpcNamenode != null) {
// This case is used for testing.
Preconditions.checkArgument(nameNodeUri == null);
this.namenode = rpcNamenode;
dtService = null;
} else {
Preconditions.checkArgument(nameNodeUri != null,
"null URI");
proxyInfo = NameNodeProxiesClient.createProxyWithClientProtocol(conf,
nameNodeUri, nnFallbackToSimpleAuth);
this.dtService = proxyInfo.getDelegationTokenService();
this.namenode = proxyInfo.getProxy();
}
String localInterfaces[] =
conf.getTrimmedStrings(DFS_CLIENT_LOCAL_INTERFACES);
localInterfaceAddrs = getLocalInterfaceAddrs(localInterfaces);
if (LOG.isDebugEnabled() && 0 != localInterfaces.length) {
LOG.debug("Using local interfaces [" +
Joiner.on(',').join(localInterfaces)+ "] with addresses [" +
Joiner.on(',').join(localInterfaceAddrs) + "]");
}
Boolean readDropBehind =
(conf.get(DFS_CLIENT_CACHE_DROP_BEHIND_READS) == null) ?
null : conf.getBoolean(DFS_CLIENT_CACHE_DROP_BEHIND_READS, false);
Long readahead = (conf.get(DFS_CLIENT_CACHE_READAHEAD) == null) ?
null : conf.getLong(DFS_CLIENT_CACHE_READAHEAD, 0);
this.serverDefaultsValidityPeriod =
conf.getLong(DFS_CLIENT_SERVER_DEFAULTS_VALIDITY_PERIOD_MS_KEY,
DFS_CLIENT_SERVER_DEFAULTS_VALIDITY_PERIOD_MS_DEFAULT);
Boolean writeDropBehind =
(conf.get(DFS_CLIENT_CACHE_DROP_BEHIND_WRITES) == null) ?
null : conf.getBoolean(DFS_CLIENT_CACHE_DROP_BEHIND_WRITES, false);
this.defaultReadCachingStrategy =
new CachingStrategy(readDropBehind, readahead);
this.defaultWriteCachingStrategy =
new CachingStrategy(writeDropBehind, readahead);
this.clientContext = ClientContext.get(
conf.get(DFS_CLIENT_CONTEXT, DFS_CLIENT_CONTEXT_DEFAULT),
dfsClientConf, conf);
if (dfsClientConf.getHedgedReadThreadpoolSize() > 0) {
this.initThreadsNumForHedgedReads(dfsClientConf.
getHedgedReadThreadpoolSize());
}
this.initThreadsNumForStripedReads(dfsClientConf.
getStripedReadThreadpoolSize());
this.saslClient = new SaslDataTransferClient(
conf, DataTransferSaslUtil.getSaslPropertiesResolver(conf),
TrustedChannelResolver.getInstance(conf), nnFallbackToSimpleAuth);
}
/**
* Return the socket addresses to use with each configured
* local interface. Local interfaces may be specified by IP
* address, IP address range using CIDR notation, interface
* name (e.g. eth0) or sub-interface name (e.g. eth0:0).
* The socket addresses consist of the IPs for the interfaces
* and the ephemeral port (port 0). If an IP, IP range, or
* interface name matches an interface with sub-interfaces
* only the IP of the interface is used. Sub-interfaces can
* be used by specifying them explicitly (by IP or name).
*
* @return SocketAddresses for the configured local interfaces,
* or an empty array if none are configured
* @throws UnknownHostException if a given interface name is invalid
*/
private static SocketAddress[] getLocalInterfaceAddrs(
String interfaceNames[]) throws UnknownHostException {
List localAddrs = new ArrayList<>();
for (String interfaceName : interfaceNames) {
if (InetAddresses.isInetAddress(interfaceName)) {
localAddrs.add(new InetSocketAddress(interfaceName, 0));
} else if (NetUtils.isValidSubnet(interfaceName)) {
for (InetAddress addr : NetUtils.getIPs(interfaceName, false)) {
localAddrs.add(new InetSocketAddress(addr, 0));
}
} else {
for (String ip : DNS.getIPs(interfaceName, false)) {
localAddrs.add(new InetSocketAddress(ip, 0));
}
}
}
return localAddrs.toArray(new SocketAddress[localAddrs.size()]);
}
/**
* Select one of the configured local interfaces at random. We use a random
* interface because other policies like round-robin are less effective
* given that we cache connections to datanodes.
*
* @return one of the local interface addresses at random, or null if no
* local interfaces are configured
*/
SocketAddress getRandomLocalInterfaceAddr() {
if (localInterfaceAddrs.length == 0) {
return null;
}
final int idx = r.nextInt(localInterfaceAddrs.length);
final SocketAddress addr = localInterfaceAddrs[idx];
LOG.debug("Using local interface {}", addr);
return addr;
}
/**
* Return the timeout that clients should use when writing to datanodes.
* @param numNodes the number of nodes in the pipeline.
*/
int getDatanodeWriteTimeout(int numNodes) {
final int t = dfsClientConf.getDatanodeSocketWriteTimeout();
return t > 0? t + HdfsConstants.WRITE_TIMEOUT_EXTENSION*numNodes: 0;
}
int getDatanodeReadTimeout(int numNodes) {
final int t = dfsClientConf.getSocketTimeout();
return t > 0? HdfsConstants.READ_TIMEOUT_EXTENSION*numNodes + t: 0;
}
@VisibleForTesting
public String getClientName() {
return clientName;
}
void checkOpen() throws IOException {
if (!clientRunning) {
throw new IOException("Filesystem closed");
}
}
/** Return the lease renewer instance. The renewer thread won't start
* until the first output stream is created. The same instance will
* be returned until all output streams are closed.
*/
public LeaseRenewer getLeaseRenewer() {
return LeaseRenewer.getInstance(
namenodeUri != null ? namenodeUri.getAuthority() : "null", ugi, this);
}
/** Get a lease and start automatic renewal */
private void beginFileLease(final long inodeId, final DFSOutputStream out)
throws IOException {
synchronized (filesBeingWritten) {
putFileBeingWritten(inodeId, out);
getLeaseRenewer().put(this);
}
}
/** Stop renewal of lease for the file. */
void endFileLease(final long inodeId) {
synchronized (filesBeingWritten) {
removeFileBeingWritten(inodeId);
// remove client from renewer if no files are open
if (filesBeingWritten.isEmpty()) {
getLeaseRenewer().closeClient(this);
}
}
}
/** Put a file. Only called from LeaseRenewer, where proper locking is
* enforced to consistently update its local dfsclients array and
* client's filesBeingWritten map.
*/
public void putFileBeingWritten(final long inodeId,
final DFSOutputStream out) {
synchronized(filesBeingWritten) {
filesBeingWritten.put(inodeId, out);
// update the last lease renewal time only when there was no
// writes. once there is one write stream open, the lease renewer
// thread keeps it updated well with in anyone's expiration time.
if (lastLeaseRenewal == 0) {
updateLastLeaseRenewal();
}
}
}
/** Remove a file. Only called from LeaseRenewer. */
public void removeFileBeingWritten(final long inodeId) {
synchronized(filesBeingWritten) {
filesBeingWritten.remove(inodeId);
if (filesBeingWritten.isEmpty()) {
lastLeaseRenewal = 0;
}
}
}
/** Is file-being-written map empty? */
public boolean isFilesBeingWrittenEmpty() {
synchronized(filesBeingWritten) {
return filesBeingWritten.isEmpty();
}
}
/** @return true if the client is running */
public boolean isClientRunning() {
return clientRunning;
}
long getLastLeaseRenewal() {
return lastLeaseRenewal;
}
void updateLastLeaseRenewal() {
synchronized(filesBeingWritten) {
if (filesBeingWritten.isEmpty()) {
return;
}
lastLeaseRenewal = Time.monotonicNow();
}
}
/**
* Renew leases.
* @return true if lease was renewed. May return false if this
* client has been closed or has no files open.
**/
public boolean renewLease() throws IOException {
if (clientRunning && !isFilesBeingWrittenEmpty()) {
try {
namenode.renewLease(clientName);
updateLastLeaseRenewal();
return true;
} catch (IOException e) {
// Abort if the lease has already expired.
final long elapsed = Time.monotonicNow() - getLastLeaseRenewal();
if (elapsed > HdfsConstants.LEASE_HARDLIMIT_PERIOD) {
LOG.warn("Failed to renew lease for " + clientName + " for "
+ (elapsed/1000) + " seconds (>= hard-limit ="
+ (HdfsConstants.LEASE_HARDLIMIT_PERIOD / 1000) + " seconds.) "
+ "Closing all files being written ...", e);
closeAllFilesBeingWritten(true);
} else {
// Let the lease renewer handle it and retry.
throw e;
}
}
}
return false;
}
/**
* Close connections the Namenode.
*/
void closeConnectionToNamenode() {
RPC.stopProxy(namenode);
}
/** Close/abort all files being written. */
public void closeAllFilesBeingWritten(final boolean abort) {
for(;;) {
final long inodeId;
final DFSOutputStream out;
synchronized(filesBeingWritten) {
if (filesBeingWritten.isEmpty()) {
return;
}
inodeId = filesBeingWritten.keySet().iterator().next();
out = filesBeingWritten.remove(inodeId);
}
if (out != null) {
try {
if (abort) {
out.abort();
} else {
out.close();
}
} catch(IOException ie) {
LOG.error("Failed to " + (abort ? "abort" : "close") + " file: "
+ out.getSrc() + " with inode: " + inodeId, ie);
}
}
}
}
/**
* Close the file system, abandoning all of the leases and files being
* created and close connections to the namenode.
*/
@Override
public synchronized void close() throws IOException {
if(clientRunning) {
// lease renewal stops when all files are closed
closeAllFilesBeingWritten(false);
clientRunning = false;
// close connections to the namenode
closeConnectionToNamenode();
}
}
/**
* Close all open streams, abandoning all of the leases and files being
* created.
* @param abort whether streams should be gracefully closed
*/
public void closeOutputStreams(boolean abort) {
if (clientRunning) {
closeAllFilesBeingWritten(abort);
}
}
/**
* @see ClientProtocol#getPreferredBlockSize(String)
*/
public long getBlockSize(String f) throws IOException {
checkOpen();
try (TraceScope ignored = newPathTraceScope("getBlockSize", f)) {
return namenode.getPreferredBlockSize(f);
} catch (IOException ie) {
LOG.warn("Problem getting block size", ie);
throw ie;
}
}
/**
* Get server default values for a number of configuration params.
* @see ClientProtocol#getServerDefaults()
*/
public FsServerDefaults getServerDefaults() throws IOException {
checkOpen();
long now = Time.monotonicNow();
if ((serverDefaults == null) ||
(now - serverDefaultsLastUpdate > serverDefaultsValidityPeriod)) {
serverDefaults = namenode.getServerDefaults();
serverDefaultsLastUpdate = now;
}
assert serverDefaults != null;
return serverDefaults;
}
/**
* Get a canonical token service name for this client's tokens. Null should
* be returned if the client is not using tokens.
* @return the token service for the client
*/
@InterfaceAudience.LimitedPrivate( { "HDFS" })
public String getCanonicalServiceName() {
return (dtService != null) ? dtService.toString() : null;
}
@Override
public TokengetDelegationToken(String renewer) throws IOException {
return getDelegationToken(renewer == null ? null : new Text(renewer));
}
/**
* @see ClientProtocol#getDelegationToken(Text)
*/
public Token getDelegationToken(Text renewer)
throws IOException {
assert dtService != null;
try (TraceScope ignored = tracer.newScope("getDelegationToken")) {
Token token =
namenode.getDelegationToken(renewer);
if (token != null) {
token.setService(this.dtService);
LOG.info("Created " + DelegationTokenIdentifier.stringifyToken(token));
} else {
LOG.info("Cannot get delegation token from " + renewer);
}
return token;
}
}
/**
* Renew a delegation token
* @param token the token to renew
* @return the new expiration time
* @throws IOException
* @deprecated Use Token.renew instead.
*/
@Deprecated
public long renewDelegationToken(Token token)
throws IOException {
LOG.info("Renewing " + DelegationTokenIdentifier.stringifyToken(token));
try {
return token.renew(conf);
} catch (InterruptedException ie) {
throw new RuntimeException("caught interrupted", ie);
} catch (RemoteException re) {
throw re.unwrapRemoteException(InvalidToken.class,
AccessControlException.class);
}
}
/**
* Cancel a delegation token
* @param token the token to cancel
* @throws IOException
* @deprecated Use Token.cancel instead.
*/
@Deprecated
public void cancelDelegationToken(Token token)
throws IOException {
LOG.info("Cancelling " + DelegationTokenIdentifier.stringifyToken(token));
try {
token.cancel(conf);
} catch (InterruptedException ie) {
throw new RuntimeException("caught interrupted", ie);
} catch (RemoteException re) {
throw re.unwrapRemoteException(InvalidToken.class,
AccessControlException.class);
}
}
@InterfaceAudience.Private
public static class Renewer extends TokenRenewer {
static {
//Ensure that HDFS Configuration files are loaded before trying to use
// the renewer.
HdfsConfiguration.init();
}
@Override
public boolean handleKind(Text kind) {
return DelegationTokenIdentifier.HDFS_DELEGATION_KIND.equals(kind);
}
@SuppressWarnings("unchecked")
@Override
public long renew(Token token, Configuration conf) throws IOException {
Token delToken =
(Token) token;
ClientProtocol nn = getNNProxy(delToken, conf);
try {
return nn.renewDelegationToken(delToken);
} catch (RemoteException re) {
throw re.unwrapRemoteException(InvalidToken.class,
AccessControlException.class);
}
}
@SuppressWarnings("unchecked")
@Override
public void cancel(Token token, Configuration conf) throws IOException {
Token delToken =
(Token) token;
LOG.info("Cancelling " +
DelegationTokenIdentifier.stringifyToken(delToken));
ClientProtocol nn = getNNProxy(delToken, conf);
try {
nn.cancelDelegationToken(delToken);
} catch (RemoteException re) {
throw re.unwrapRemoteException(InvalidToken.class,
AccessControlException.class);
}
}
private static ClientProtocol getNNProxy(
Token token, Configuration conf)
throws IOException {
URI uri = HAUtilClient.getServiceUriFromToken(
HdfsConstants.HDFS_URI_SCHEME, token);
if (HAUtilClient.isTokenForLogicalUri(token) &&
!HAUtilClient.isLogicalUri(conf, uri)) {
// If the token is for a logical nameservice, but the configuration
// we have disagrees about that, we can't actually renew it.
// This can be the case in MR, for example, if the RM doesn't
// have all of the HA clusters configured in its configuration.
throw new IOException("Unable to map logical nameservice URI '" +
uri + "' to a NameNode. Local configuration does not have " +
"a failover proxy provider configured.");
}
ProxyAndInfo info =
NameNodeProxiesClient.createProxyWithClientProtocol(conf, uri, null);
assert info.getDelegationTokenService().equals(token.getService()) :
"Returned service '" + info.getDelegationTokenService().toString() +
"' doesn't match expected service '" +
token.getService().toString() + "'";
return info.getProxy();
}
@Override
public boolean isManaged(Token token) throws IOException {
return true;
}
}
/**
* Report corrupt blocks that were discovered by the client.
* @see ClientProtocol#reportBadBlocks(LocatedBlock[])
*/
public void reportBadBlocks(LocatedBlock[] blocks) throws IOException {
checkOpen();
namenode.reportBadBlocks(blocks);
}
public LocatedBlocks getLocatedBlocks(String src, long start)
throws IOException {
return getLocatedBlocks(src, start, dfsClientConf.getPrefetchSize());
}
/*
* This is just a wrapper around callGetBlockLocations, but non-static so that
* we can stub it out for tests.
*/
@VisibleForTesting
public LocatedBlocks getLocatedBlocks(String src, long start, long length)
throws IOException {
try (TraceScope ignored = newPathTraceScope("getBlockLocations", src)) {
return callGetBlockLocations(namenode, src, start, length);
}
}
/**
* @see ClientProtocol#getBlockLocations(String, long, long)
*/
static LocatedBlocks callGetBlockLocations(ClientProtocol namenode,
String src, long start, long length)
throws IOException {
try {
return namenode.getBlockLocations(src, start, length);
} catch(RemoteException re) {
throw re.unwrapRemoteException(AccessControlException.class,
FileNotFoundException.class,
UnresolvedPathException.class);
}
}
/**
* Recover a file's lease
* @param src a file's path
* @return true if the file is already closed
* @throws IOException
*/
boolean recoverLease(String src) throws IOException {
checkOpen();
try (TraceScope ignored = newPathTraceScope("recoverLease", src)) {
return namenode.recoverLease(src, clientName);
} catch (RemoteException re) {
throw re.unwrapRemoteException(FileNotFoundException.class,
AccessControlException.class,
UnresolvedPathException.class);
}
}
/**
* Get block location info about file
*
* getBlockLocations() returns a list of hostnames that store
* data for a specific file region. It returns a set of hostnames
* for every block within the indicated region.
*
* This function is very useful when writing code that considers
* data-placement when performing operations. For example, the
* MapReduce system tries to schedule tasks on the same machines
* as the data-block the task processes.
*
* Please refer to
* {@link FileSystem#getFileBlockLocations(FileStatus, long, long)}
* for more details.
*/
public BlockLocation[] getBlockLocations(String src, long start,
long length) throws IOException {
checkOpen();
try (TraceScope ignored = newPathTraceScope("getBlockLocations", src)) {
LocatedBlocks blocks = getLocatedBlocks(src, start, length);
BlockLocation[] locations = DFSUtilClient.locatedBlocks2Locations(blocks);
HdfsBlockLocation[] hdfsLocations =
new HdfsBlockLocation[locations.length];
for (int i = 0; i < locations.length; i++) {
hdfsLocations[i] = new HdfsBlockLocation(locations[i], blocks.get(i));
}
return hdfsLocations;
}
}
/**
* Wraps the stream in a CryptoInputStream if the underlying file is
* encrypted.
*/
public HdfsDataInputStream createWrappedInputStream(DFSInputStream dfsis)
throws IOException {
FileEncryptionInfo feInfo = dfsis.getFileEncryptionInfo();
if (feInfo != null) {
CryptoInputStream cryptoIn;
try (TraceScope ignored = getTracer().newScope("decryptEDEK")) {
cryptoIn = HdfsKMSUtil.createWrappedInputStream(dfsis,
getKeyProvider(), feInfo, getConfiguration());
}
return new HdfsDataInputStream(cryptoIn);
} else {
// No FileEncryptionInfo so no encryption.
return new HdfsDataInputStream(dfsis);
}
}
/**
* Wraps the stream in a CryptoOutputStream if the underlying file is
* encrypted.
*/
public HdfsDataOutputStream createWrappedOutputStream(DFSOutputStream dfsos,
FileSystem.Statistics statistics) throws IOException {
return createWrappedOutputStream(dfsos, statistics, 0);
}
/**
* Wraps the stream in a CryptoOutputStream if the underlying file is
* encrypted.
*/
public HdfsDataOutputStream createWrappedOutputStream(DFSOutputStream dfsos,
FileSystem.Statistics statistics, long startPos) throws IOException {
final FileEncryptionInfo feInfo = dfsos.getFileEncryptionInfo();
if (feInfo != null) {
// File is encrypted, wrap the stream in a crypto stream.
// Currently only one version, so no special logic based on the version #
HdfsKMSUtil.getCryptoProtocolVersion(feInfo);
final CryptoCodec codec = HdfsKMSUtil.getCryptoCodec(conf, feInfo);
KeyVersion decrypted;
try (TraceScope ignored = tracer.newScope("decryptEDEK")) {
decrypted = HdfsKMSUtil.decryptEncryptedDataEncryptionKey(feInfo,
getKeyProvider());
}
final CryptoOutputStream cryptoOut =
new CryptoOutputStream(dfsos, codec,
decrypted.getMaterial(), feInfo.getIV(), startPos);
return new HdfsDataOutputStream(cryptoOut, statistics, startPos);
} else {
// No FileEncryptionInfo present so no encryption.
return new HdfsDataOutputStream(dfsos, statistics, startPos);
}
}
public DFSInputStream open(String src) throws IOException {
return open(src, dfsClientConf.getIoBufferSize(), true);
}
/**
* Create an input stream that obtains a nodelist from the
* namenode, and then reads from all the right places. Creates
* inner subclass of InputStream that does the right out-of-band
* work.
* @deprecated Use {@link #open(String, int, boolean)} instead.
*/
@Deprecated
public DFSInputStream open(String src, int buffersize, boolean verifyChecksum,
FileSystem.Statistics stats) throws IOException {
return open(src, buffersize, verifyChecksum);
}
/**
* Create an input stream that obtains a nodelist from the
* namenode, and then reads from all the right places. Creates
* inner subclass of InputStream that does the right out-of-band
* work.
*/
public DFSInputStream open(String src, int buffersize, boolean verifyChecksum)
throws IOException {
checkOpen();
// Get block info from namenode
try (TraceScope ignored = newPathTraceScope("newDFSInputStream", src)) {
LocatedBlocks locatedBlocks = getLocatedBlocks(src, 0);
return openInternal(locatedBlocks, src, verifyChecksum);
}
}
/**
* Create an input stream from the {@link HdfsPathHandle} if the
* constraints encoded from {@link
* DistributedFileSystem#createPathHandle(FileStatus, Options.HandleOpt...)}
* are satisfied. Note that HDFS does not ensure that these constraints
* remain invariant for the life of the stream. It only checks that they
* still held when the stream was opened.
* @param fd Handle to an entity in HDFS, with constraints
* @param buffersize ignored
* @param verifyChecksum Verify checksums before returning data to client
* @return Data from the referent of the {@link HdfsPathHandle}.
* @throws IOException On I/O error
*/
public DFSInputStream open(HdfsPathHandle fd, int buffersize,
boolean verifyChecksum) throws IOException {
checkOpen();
String src = fd.getPath();
try (TraceScope ignored = newPathTraceScope("newDFSInputStream", src)) {
HdfsLocatedFileStatus s = getLocatedFileInfo(src, true);
fd.verify(s); // check invariants in path handle
LocatedBlocks locatedBlocks = s.getLocatedBlocks();
return openInternal(locatedBlocks, src, verifyChecksum);
}
}
private DFSInputStream openInternal(LocatedBlocks locatedBlocks, String src,
boolean verifyChecksum) throws IOException {
if (locatedBlocks != null) {
ErasureCodingPolicy ecPolicy = locatedBlocks.getErasureCodingPolicy();
if (ecPolicy != null) {
return new DFSStripedInputStream(this, src, verifyChecksum, ecPolicy,
locatedBlocks);
}
return new DFSInputStream(this, src, verifyChecksum, locatedBlocks);
} else {
throw new IOException("Cannot open filename " + src);
}
}
/**
* Get the namenode associated with this DFSClient object
* @return the namenode associated with this DFSClient object
*/
public ClientProtocol getNamenode() {
return namenode;
}
/**
* Call {@link #create(String, boolean, short, long, Progressable)} with
* default replication and blockSize and null
* progress.
*/
public OutputStream create(String src, boolean overwrite)
throws IOException {
return create(src, overwrite, dfsClientConf.getDefaultReplication(),
dfsClientConf.getDefaultBlockSize(), null);
}
/**
* Call {@link #create(String, boolean, short, long, Progressable)} with
* default replication and blockSize.
*/
public OutputStream create(String src,
boolean overwrite, Progressable progress) throws IOException {
return create(src, overwrite, dfsClientConf.getDefaultReplication(),
dfsClientConf.getDefaultBlockSize(), progress);
}
/**
* Call {@link #create(String, boolean, short, long, Progressable)} with
* null progress.
*/
public OutputStream create(String src, boolean overwrite, short replication,
long blockSize) throws IOException {
return create(src, overwrite, replication, blockSize, null);
}
/**
* Call {@link #create(String, boolean, short, long, Progressable, int)}
* with default bufferSize.
*/
public OutputStream create(String src, boolean overwrite, short replication,
long blockSize, Progressable progress) throws IOException {
return create(src, overwrite, replication, blockSize, progress,
dfsClientConf.getIoBufferSize());
}
/**
* Call {@link #create(String, FsPermission, EnumSet, short, long,
* Progressable, int, ChecksumOpt)} with default permission
* {@link FsPermission#getFileDefault()}.
*
* @param src File name
* @param overwrite overwrite an existing file if true
* @param replication replication factor for the file
* @param blockSize maximum block size
* @param progress interface for reporting client progress
* @param buffersize underlying buffersize
*
* @return output stream
*/
public OutputStream create(String src, boolean overwrite, short replication,
long blockSize, Progressable progress, int buffersize)
throws IOException {
return create(src, FsPermission.getFileDefault(),
overwrite ? EnumSet.of(CreateFlag.CREATE, CreateFlag.OVERWRITE)
: EnumSet.of(CreateFlag.CREATE), replication, blockSize, progress,
buffersize, null);
}
/**
* Call {@link #create(String, FsPermission, EnumSet, boolean, short,
* long, Progressable, int, ChecksumOpt)} with createParent
* set to true.
*/
public DFSOutputStream create(String src, FsPermission permission,
EnumSet flag, short replication, long blockSize,
Progressable progress, int buffersize, ChecksumOpt checksumOpt)
throws IOException {
return create(src, permission, flag, true,
replication, blockSize, progress, buffersize, checksumOpt, null);
}
/**
* Create a new dfs file with the specified block replication
* with write-progress reporting and return an output stream for writing
* into the file.
*
* @param src File name
* @param permission The permission of the directory being created.
* If null, use default permission
* {@link FsPermission#getFileDefault()}
* @param flag indicates create a new file or create/overwrite an
* existing file or append to an existing file
* @param createParent create missing parent directory if true
* @param replication block replication
* @param blockSize maximum block size
* @param progress interface for reporting client progress
* @param buffersize underlying buffer size
* @param checksumOpt checksum options
*
* @return output stream
*
* @see ClientProtocol#create for detailed description of exceptions thrown
*/
public DFSOutputStream create(String src, FsPermission permission,
EnumSet flag, boolean createParent, short replication,
long blockSize, Progressable progress, int buffersize,
ChecksumOpt checksumOpt) throws IOException {
return create(src, permission, flag, createParent, replication, blockSize,
progress, buffersize, checksumOpt, null);
}
private FsPermission applyUMask(FsPermission permission) {
if (permission == null) {
permission = FsPermission.getFileDefault();
}
return FsCreateModes.applyUMask(permission, dfsClientConf.getUMask());
}
private FsPermission applyUMaskDir(FsPermission permission) {
if (permission == null) {
permission = FsPermission.getDirDefault();
}
return FsCreateModes.applyUMask(permission, dfsClientConf.getUMask());
}
/**
* Same as {@link #create(String, FsPermission, EnumSet, boolean, short, long,
* Progressable, int, ChecksumOpt)} with the addition of favoredNodes that is
* a hint to where the namenode should place the file blocks.
* The favored nodes hint is not persisted in HDFS. Hence it may be honored
* at the creation time only. HDFS could move the blocks during balancing or
* replication, to move the blocks from favored nodes. A value of null means
* no favored nodes for this create
*/
public DFSOutputStream create(String src, FsPermission permission,
EnumSet flag, boolean createParent, short replication,
long blockSize, Progressable progress, int buffersize,
ChecksumOpt checksumOpt, InetSocketAddress[] favoredNodes)
throws IOException {
return create(src, permission, flag, createParent, replication, blockSize,
progress, buffersize, checksumOpt, favoredNodes, null);
}
/**
* Same as {@link #create(String, FsPermission, EnumSet, boolean, short, long,
* Progressable, int, ChecksumOpt, InetSocketAddress[])} with the addition of
* ecPolicyName that is used to specify a specific erasure coding policy
* instead of inheriting any policy from this new file's parent directory.
* This policy will be persisted in HDFS. A value of null means inheriting
* parent groups' whatever policy.
*/
public DFSOutputStream create(String src, FsPermission permission,
EnumSet flag, boolean createParent, short replication,
long blockSize, Progressable progress, int buffersize,
ChecksumOpt checksumOpt, InetSocketAddress[] favoredNodes,
String ecPolicyName) throws IOException {
checkOpen();
final FsPermission masked = applyUMask(permission);
LOG.debug("{}: masked={}", src, masked);
final DFSOutputStream result = DFSOutputStream.newStreamForCreate(this,
src, masked, flag, createParent, replication, blockSize, progress,
dfsClientConf.createChecksum(checksumOpt),
getFavoredNodesStr(favoredNodes), ecPolicyName);
beginFileLease(result.getFileId(), result);
return result;
}
private String[] getFavoredNodesStr(InetSocketAddress[] favoredNodes) {
String[] favoredNodeStrs = null;
if (favoredNodes != null) {
favoredNodeStrs = new String[favoredNodes.length];
for (int i = 0; i < favoredNodes.length; i++) {
favoredNodeStrs[i] =
favoredNodes[i].getHostName() + ":" + favoredNodes[i].getPort();
}
}
return favoredNodeStrs;
}
/**
* Append to an existing file if {@link CreateFlag#APPEND} is present
*/
private DFSOutputStream primitiveAppend(String src, EnumSet flag,
Progressable progress) throws IOException {
if (flag.contains(CreateFlag.APPEND)) {
HdfsFileStatus stat = getFileInfo(src);
if (stat == null) { // No file to append to
// New file needs to be created if create option is present
if (!flag.contains(CreateFlag.CREATE)) {
throw new FileNotFoundException(
"failed to append to non-existent file " + src + " on client "
+ clientName);
}
return null;
}
return callAppend(src, flag, progress, null);
}
return null;
}
/**
* Same as {{@link #create(String, FsPermission, EnumSet, short, long,
* Progressable, int, ChecksumOpt)} except that the permission
* is absolute (ie has already been masked with umask.
*/
public DFSOutputStream primitiveCreate(String src, FsPermission absPermission,
EnumSet flag, boolean createParent, short replication,
long blockSize, Progressable progress, int buffersize,
ChecksumOpt checksumOpt) throws IOException {
checkOpen();
CreateFlag.validate(flag);
DFSOutputStream result = primitiveAppend(src, flag, progress);
if (result == null) {
DataChecksum checksum = dfsClientConf.createChecksum(checksumOpt);
result = DFSOutputStream.newStreamForCreate(this, src, absPermission,
flag, createParent, replication, blockSize, progress, checksum,
null, null);
}
beginFileLease(result.getFileId(), result);
return result;
}
/**
* Creates a symbolic link.
*
* @see ClientProtocol#createSymlink(String, String,FsPermission, boolean)
*/
public void createSymlink(String target, String link, boolean createParent)
throws IOException {
checkOpen();
try (TraceScope ignored = newPathTraceScope("createSymlink", target)) {
final FsPermission dirPerm = applyUMask(null);
namenode.createSymlink(target, link, dirPerm, createParent);
} catch (RemoteException re) {
throw re.unwrapRemoteException(AccessControlException.class,
FileAlreadyExistsException.class,
FileNotFoundException.class,
ParentNotDirectoryException.class,
NSQuotaExceededException.class,
DSQuotaExceededException.class,
QuotaByStorageTypeExceededException.class,
UnresolvedPathException.class,
SnapshotAccessControlException.class);
}
}
/**
* Resolve the *first* symlink, if any, in the path.
*
* @see ClientProtocol#getLinkTarget(String)
*/
public String getLinkTarget(String path) throws IOException {
checkOpen();
try (TraceScope ignored = newPathTraceScope("getLinkTarget", path)) {
return namenode.getLinkTarget(path);
} catch (RemoteException re) {
throw re.unwrapRemoteException(AccessControlException.class,
FileNotFoundException.class);
}
}
/**
* Invoke namenode append RPC.
* It retries in case of some {@link RetriableException}.
*/
private LastBlockWithStatus callAppend(String src,
EnumSetWritable flag) throws IOException {
final long startTime = Time.monotonicNow();
for(;;) {
try {
return namenode.append(src, clientName, flag);
} catch(RemoteException re) {
if (Time.monotonicNow() - startTime > 5000
|| !RetriableException.class.getName().equals(
re.getClassName())) {
throw re;
}
try { // sleep and retry
Thread.sleep(500);
} catch (InterruptedException e) {
throw DFSUtilClient.toInterruptedIOException("callAppend", e);
}
}
}
}
/** Method to get stream returned by append call */
private DFSOutputStream callAppend(String src, EnumSet flag,
Progressable progress, String[] favoredNodes) throws IOException {
CreateFlag.validateForAppend(flag);
try {
final LastBlockWithStatus blkWithStatus = callAppend(src,
new EnumSetWritable<>(flag, CreateFlag.class));
HdfsFileStatus status = blkWithStatus.getFileStatus();
if (status == null) {
LOG.debug("NameNode is on an older version, request file " +
"info with additional RPC call for file: {}", src);
status = getFileInfo(src);
}
return DFSOutputStream.newStreamForAppend(this, src, flag, progress,
blkWithStatus.getLastBlock(), status,
dfsClientConf.createChecksum(null), favoredNodes);
} catch(RemoteException re) {
throw re.unwrapRemoteException(AccessControlException.class,
FileNotFoundException.class,
SafeModeException.class,
DSQuotaExceededException.class,
QuotaByStorageTypeExceededException.class,
UnsupportedOperationException.class,
UnresolvedPathException.class,
SnapshotAccessControlException.class);
}
}
/**
* Append to an existing HDFS file.
*
* @param src file name
* @param buffersize buffer size
* @param flag indicates whether to append data to a new block instead of
* the last block
* @param progress for reporting write-progress; null is acceptable.
* @param statistics file system statistics; null is acceptable.
* @return an output stream for writing into the file
*
* @see ClientProtocol#append(String, String, EnumSetWritable)
*/
public HdfsDataOutputStream append(final String src, final int buffersize,
EnumSet flag, final Progressable progress,
final FileSystem.Statistics statistics) throws IOException {
final DFSOutputStream out = append(src, buffersize, flag, null, progress);
return createWrappedOutputStream(out, statistics, out.getInitialLen());
}
/**
* Append to an existing HDFS file.
*
* @param src file name
* @param buffersize buffer size
* @param flag indicates whether to append data to a new block instead of the
* last block
* @param progress for reporting write-progress; null is acceptable.
* @param statistics file system statistics; null is acceptable.
* @param favoredNodes FavoredNodes for new blocks
* @return an output stream for writing into the file
* @see ClientProtocol#append(String, String, EnumSetWritable)
*/
public HdfsDataOutputStream append(final String src, final int buffersize,
EnumSet flag, final Progressable progress,
final FileSystem.Statistics statistics,
final InetSocketAddress[] favoredNodes) throws IOException {
final DFSOutputStream out = append(src, buffersize, flag,
getFavoredNodesStr(favoredNodes), progress);
return createWrappedOutputStream(out, statistics, out.getInitialLen());
}
private DFSOutputStream append(String src, int buffersize,
EnumSet flag, String[] favoredNodes, Progressable progress)
throws IOException {
checkOpen();
final DFSOutputStream result = callAppend(src, flag, progress,
favoredNodes);
beginFileLease(result.getFileId(), result);
return result;
}
/**
* Set replication for an existing file.
* @param src file name
* @param replication replication to set the file to
*
* @see ClientProtocol#setReplication(String, short)
*/
public boolean setReplication(String src, short replication)
throws IOException {
checkOpen();
try (TraceScope ignored = newPathTraceScope("setReplication", src)) {
return namenode.setReplication(src, replication);
} catch (RemoteException re) {
throw re.unwrapRemoteException(AccessControlException.class,
FileNotFoundException.class,
SafeModeException.class,
DSQuotaExceededException.class,
QuotaByStorageTypeExceededException.class,
UnresolvedPathException.class,
SnapshotAccessControlException.class);
}
}
/**
* Set storage policy for an existing file/directory
* @param src file/directory name
* @param policyName name of the storage policy
*/
public void setStoragePolicy(String src, String policyName)
throws IOException {
checkOpen();
try (TraceScope ignored = newPathTraceScope("setStoragePolicy", src)) {
namenode.setStoragePolicy(src, policyName);
} catch (RemoteException e) {
throw e.unwrapRemoteException(AccessControlException.class,
FileNotFoundException.class,
SafeModeException.class,
NSQuotaExceededException.class,
UnresolvedPathException.class,
SnapshotAccessControlException.class);
}
}
/**
* Unset storage policy set for a given file/directory.
* @param src file/directory name
*/
public void unsetStoragePolicy(String src) throws IOException {
checkOpen();
try (TraceScope ignored = newPathTraceScope("unsetStoragePolicy", src)) {
namenode.unsetStoragePolicy(src);
} catch (RemoteException e) {
throw e.unwrapRemoteException(AccessControlException.class,
FileNotFoundException.class,
SafeModeException.class,
NSQuotaExceededException.class,
UnresolvedPathException.class,
SnapshotAccessControlException.class);
}
}
/**
* @param path file/directory name
* @return Get the storage policy for specified path
*/
public BlockStoragePolicy getStoragePolicy(String path) throws IOException {
checkOpen();
try (TraceScope ignored = newPathTraceScope("getStoragePolicy", path)) {
return namenode.getStoragePolicy(path);
} catch (RemoteException e) {
throw e.unwrapRemoteException(AccessControlException.class,
FileNotFoundException.class,
SafeModeException.class,
UnresolvedPathException.class);
}
}
/**
* @return All the existing storage policies
*/
public BlockStoragePolicy[] getStoragePolicies() throws IOException {
checkOpen();
try (TraceScope ignored = tracer.newScope("getStoragePolicies")) {
return namenode.getStoragePolicies();
}
}
/**
* Rename file or directory.
* @see ClientProtocol#rename(String, String)
* @deprecated Use {@link #rename(String, String, Options.Rename...)} instead.
*/
@Deprecated
public boolean rename(String src, String dst) throws IOException {
checkOpen();
try (TraceScope ignored = newSrcDstTraceScope("rename", src, dst)) {
return namenode.rename(src, dst);
} catch (RemoteException re) {
throw re.unwrapRemoteException(AccessControlException.class,
NSQuotaExceededException.class,
DSQuotaExceededException.class,
QuotaByStorageTypeExceededException.class,
UnresolvedPathException.class,
SnapshotAccessControlException.class);
}
}
/**
* Move blocks from src to trg and delete src
* See {@link ClientProtocol#concat}.
*/
public void concat(String trg, String [] srcs) throws IOException {
checkOpen();
try (TraceScope ignored = tracer.newScope("concat")) {
namenode.concat(trg, srcs);
} catch (RemoteException re) {
throw re.unwrapRemoteException(AccessControlException.class,
UnresolvedPathException.class,
SnapshotAccessControlException.class);
}
}
/**
* Rename file or directory.
* @see ClientProtocol#rename2(String, String, Options.Rename...)
*/
public void rename(String src, String dst, Options.Rename... options)
throws IOException {
checkOpen();
try (TraceScope ignored = newSrcDstTraceScope("rename2", src, dst)) {
namenode.rename2(src, dst, options);
} catch (RemoteException re) {
throw re.unwrapRemoteException(AccessControlException.class,
DSQuotaExceededException.class,
QuotaByStorageTypeExceededException.class,
FileAlreadyExistsException.class,
FileNotFoundException.class,
ParentNotDirectoryException.class,
SafeModeException.class,
NSQuotaExceededException.class,
UnresolvedPathException.class,
SnapshotAccessControlException.class);
}
}
/**
* Truncate a file to an indicated size
* See {@link ClientProtocol#truncate}.
*/
public boolean truncate(String src, long newLength) throws IOException {
checkOpen();
if (newLength < 0) {
throw new HadoopIllegalArgumentException(
"Cannot truncate to a negative file size: " + newLength + ".");
}
try (TraceScope ignored = newPathTraceScope("truncate", src)) {
return namenode.truncate(src, newLength, clientName);
} catch (RemoteException re) {
throw re.unwrapRemoteException(AccessControlException.class,
UnresolvedPathException.class);
}
}
/**
* Delete file or directory.
* See {@link ClientProtocol#delete(String, boolean)}.
*/
@Deprecated
public boolean delete(String src) throws IOException {
checkOpen();
return delete(src, true);
}
/**
* delete file or directory.
* delete contents of the directory if non empty and recursive
* set to true
*
* @see ClientProtocol#delete(String, boolean)
*/
public boolean delete(String src, boolean recursive) throws IOException {
checkOpen();
try (TraceScope ignored = newPathTraceScope("delete", src)) {
return namenode.delete(src, recursive);
} catch (RemoteException re) {
throw re.unwrapRemoteException(AccessControlException.class,
FileNotFoundException.class,
SafeModeException.class,
UnresolvedPathException.class,
SnapshotAccessControlException.class,
PathIsNotEmptyDirectoryException.class);
}
}
/** Implemented using getFileInfo(src)
*/
public boolean exists(String src) throws IOException {
checkOpen();
return getFileInfo(src) != null;
}
/**
* Get a partial listing of the indicated directory
* No block locations need to be fetched
*/
public DirectoryListing listPaths(String src, byte[] startAfter)
throws IOException {
return listPaths(src, startAfter, false);
}
/**
* Get a partial listing of the indicated directory
*
* Recommend to use HdfsFileStatus.EMPTY_NAME as startAfter
* if the application wants to fetch a listing starting from
* the first entry in the directory
*
* @see ClientProtocol#getListing(String, byte[], boolean)
*/
public DirectoryListing listPaths(String src, byte[] startAfter,
boolean needLocation) throws IOException {
checkOpen();
try (TraceScope ignored = newPathTraceScope("listPaths", src)) {
return namenode.getListing(src, startAfter, needLocation);
} catch (RemoteException re) {
throw re.unwrapRemoteException(AccessControlException.class,
FileNotFoundException.class,
UnresolvedPathException.class);
}
}
/**
* Get the file info for a specific file or directory.
* @param src The string representation of the path to the file
* @return object containing information regarding the file
* or null if file not found
*
* @see ClientProtocol#getFileInfo(String) for description of exceptions
*/
public HdfsFileStatus getFileInfo(String src) throws IOException {
checkOpen();
try (TraceScope ignored = newPathTraceScope("getFileInfo", src)) {
return namenode.getFileInfo(src);
} catch (RemoteException re) {
throw re.unwrapRemoteException(AccessControlException.class,
FileNotFoundException.class,
UnresolvedPathException.class);
}
}
/**
* Get the file info for a specific file or directory.
* @param src The string representation of the path to the file
* @param needBlockToken Include block tokens in {@link LocatedBlocks}.
* When block tokens are included, this call is a superset of
* {@link #getBlockLocations(String, long)}.
* @return object containing information regarding the file
* or null if file not found
*
* @see DFSClient#open(HdfsPathHandle, int, boolean)
* @see ClientProtocol#getFileInfo(String) for description of
* exceptions
*/
public HdfsLocatedFileStatus getLocatedFileInfo(String src,
boolean needBlockToken) throws IOException {
checkOpen();
try (TraceScope ignored = newPathTraceScope("getLocatedFileInfo", src)) {
return namenode.getLocatedFileInfo(src, needBlockToken);
} catch (RemoteException re) {
throw re.unwrapRemoteException(AccessControlException.class,
FileNotFoundException.class,
UnresolvedPathException.class);
}
}
/**
* Close status of a file
* @return true if file is already closed
*/
public boolean isFileClosed(String src) throws IOException{
checkOpen();
try (TraceScope ignored = newPathTraceScope("isFileClosed", src)) {
return namenode.isFileClosed(src);
} catch (RemoteException re) {
throw re.unwrapRemoteException(AccessControlException.class,
FileNotFoundException.class,
UnresolvedPathException.class);
}
}
/**
* Get the file info for a specific file or directory. If src
* refers to a symlink then the FileStatus of the link is returned.
* @param src path to a file or directory.
*
* For description of exceptions thrown
* @see ClientProtocol#getFileLinkInfo(String)
*/
public HdfsFileStatus getFileLinkInfo(String src) throws IOException {
checkOpen();
try (TraceScope ignored = newPathTraceScope("getFileLinkInfo", src)) {
return namenode.getFileLinkInfo(src);
} catch (RemoteException re) {
throw re.unwrapRemoteException(AccessControlException.class,
UnresolvedPathException.class);
}
}
@InterfaceAudience.Private
public void clearDataEncryptionKey() {
LOG.debug("Clearing encryption key");
synchronized (this) {
encryptionKey = null;
}
}
/**
* @return true if data sent between this client and DNs should be encrypted,
* false otherwise.
* @throws IOException in the event of error communicating with the NN
*/
boolean shouldEncryptData() throws IOException {
FsServerDefaults d = getServerDefaults();
return d != null && d.getEncryptDataTransfer();
}
@Override
public DataEncryptionKey newDataEncryptionKey() throws IOException {
if (shouldEncryptData()) {
synchronized (this) {
if (encryptionKey == null ||
encryptionKey.expiryDate < Time.now()) {
LOG.debug("Getting new encryption token from NN");
encryptionKey = namenode.getDataEncryptionKey();
}
return encryptionKey;
}
} else {
return null;
}
}
@VisibleForTesting
public DataEncryptionKey getEncryptionKey() {
return encryptionKey;
}
private FileChecksum getFileChecksumInternal(
String src, long length, ChecksumCombineMode combineMode)
throws IOException {
checkOpen();
Preconditions.checkArgument(length >= 0);
LocatedBlocks blockLocations = null;
FileChecksumHelper.FileChecksumComputer maker = null;
ErasureCodingPolicy ecPolicy = null;
if (length > 0) {
blockLocations = getBlockLocations(src, length);
ecPolicy = blockLocations.getErasureCodingPolicy();
}
maker = ecPolicy != null ?
new FileChecksumHelper.StripedFileNonStripedChecksumComputer(src,
length, blockLocations, namenode, this, ecPolicy, combineMode) :
new FileChecksumHelper.ReplicatedFileChecksumComputer(src, length,
blockLocations, namenode, this, combineMode);
maker.compute();
return maker.getFileChecksum();
}
/**
* Get the checksum of the whole file or a range of the file. Note that the
* range always starts from the beginning of the file. The file can be
* in replicated form, or striped mode. Depending on the
* dfs.checksum.combine.mode, checksums may or may not be comparable between
* different block layout forms.
*
* @param src The file path
* @param length the length of the range, i.e., the range is [0, length]
* @return The checksum
* @see DistributedFileSystem#getFileChecksum(Path)
*/
public FileChecksum getFileChecksumWithCombineMode(String src, long length)
throws IOException {
ChecksumCombineMode combineMode = getConf().getChecksumCombineMode();
return getFileChecksumInternal(src, length, combineMode);
}
/**
* Get the checksum of the whole file or a range of the file. Note that the
* range always starts from the beginning of the file. The file can be
* in replicated form, or striped mode. It can be used to checksum and compare
* two replicated files, or two striped files, but not applicable for two
* files of different block layout forms.
*
* @param src The file path
* @param length the length of the range, i.e., the range is [0, length]
* @return The checksum
* @see DistributedFileSystem#getFileChecksum(Path)
*/
public MD5MD5CRC32FileChecksum getFileChecksum(String src, long length)
throws IOException {
return (MD5MD5CRC32FileChecksum) getFileChecksumInternal(
src, length, ChecksumCombineMode.MD5MD5CRC);
}
protected LocatedBlocks getBlockLocations(String src,
long length) throws IOException {
//get block locations for the file range
LocatedBlocks blockLocations = callGetBlockLocations(namenode,
src, 0, length);
if (null == blockLocations) {
throw new FileNotFoundException("File does not exist: " + src);
}
if (blockLocations.isUnderConstruction()) {
throw new IOException("Fail to get checksum, since file " + src
+ " is under construction.");
}
return blockLocations;
}
protected IOStreamPair connectToDN(DatanodeInfo dn, int timeout,
Token blockToken)
throws IOException {
return DFSUtilClient.connectToDN(dn, timeout, conf, saslClient,
socketFactory, getConf().isConnectToDnViaHostname(), this, blockToken);
}
/**
* Infer the checksum type for a replica by sending an OP_READ_BLOCK
* for the first byte of that replica. This is used for compatibility
* with older HDFS versions which did not include the checksum type in
* OpBlockChecksumResponseProto.
*
* @param lb the located block
* @param dn the connected datanode
* @return the inferred checksum type
* @throws IOException if an error occurs
*/
protected Type inferChecksumTypeByReading(LocatedBlock lb, DatanodeInfo dn)
throws IOException {
IOStreamPair pair = connectToDN(dn, dfsClientConf.getSocketTimeout(),
lb.getBlockToken());
try {
new Sender((DataOutputStream) pair.out).readBlock(lb.getBlock(),
lb.getBlockToken(), clientName,
0, 1, true, CachingStrategy.newDefaultStrategy());
final BlockOpResponseProto reply =
BlockOpResponseProto.parseFrom(PBHelperClient.vintPrefixed(pair.in));
String logInfo = "trying to read " + lb.getBlock() + " from datanode " +
dn;
DataTransferProtoUtil.checkBlockOpStatus(reply, logInfo);
return PBHelperClient.convert(
reply.getReadOpChecksumInfo().getChecksum().getType());
} finally {
IOUtilsClient.cleanup(null, pair.in, pair.out);
}
}
/**
* Set permissions to a file or directory.
* @param src path name.
* @param permission permission to set to
*
* @see ClientProtocol#setPermission(String, FsPermission)
*/
public void setPermission(String src, FsPermission permission)
throws IOException {
checkOpen();
try (TraceScope ignored = newPathTraceScope("setPermission", src)) {
namenode.setPermission(src, permission);
} catch (RemoteException re) {
throw re.unwrapRemoteException(AccessControlException.class,
FileNotFoundException.class,
SafeModeException.class,
UnresolvedPathException.class,
SnapshotAccessControlException.class);
}
}
/**
* Set file or directory owner.
* @param src path name.
* @param username user id.
* @param groupname user group.
*
* @see ClientProtocol#setOwner(String, String, String)
*/
public void setOwner(String src, String username, String groupname)
throws IOException {
checkOpen();
try (TraceScope ignored = newPathTraceScope("setOwner", src)) {
namenode.setOwner(src, username, groupname);
} catch (RemoteException re) {
throw re.unwrapRemoteException(AccessControlException.class,
FileNotFoundException.class,
SafeModeException.class,
UnresolvedPathException.class,
SnapshotAccessControlException.class);
}
}
private long getStateByIndex(int stateIndex) throws IOException {
checkOpen();
try (TraceScope ignored = tracer.newScope("getStats")) {
long[] states = namenode.getStats();
return states.length > stateIndex ? states[stateIndex] : -1;
}
}
/**
* @see ClientProtocol#getStats()
*/
public FsStatus getDiskStatus() throws IOException {
return new FsStatus(getStateByIndex(0),
getStateByIndex(1), getStateByIndex(2));
}
/**
* Returns count of blocks with no good replicas left. Normally should be
* zero.
* @throws IOException
*/
public long getMissingBlocksCount() throws IOException {
return getStateByIndex(ClientProtocol.
GET_STATS_MISSING_BLOCKS_IDX);
}
/**
* Returns count of blocks with replication factor 1 and have
* lost the only replica.
* @throws IOException
*/
public long getMissingReplOneBlocksCount() throws IOException {
return getStateByIndex(ClientProtocol.
GET_STATS_MISSING_REPL_ONE_BLOCKS_IDX);
}
/**
* Returns count of blocks pending on deletion.
* @throws IOException
*/
public long getPendingDeletionBlocksCount() throws IOException {
return getStateByIndex(ClientProtocol.
GET_STATS_PENDING_DELETION_BLOCKS_IDX);
}
/**
* Returns aggregated count of blocks with less redundancy.
* @throws IOException
*/
public long getLowRedundancyBlocksCount() throws IOException {
return getStateByIndex(ClientProtocol.GET_STATS_LOW_REDUNDANCY_IDX);
}
/**
* Returns count of blocks with at least one replica marked corrupt.
* @throws IOException
*/
public long getCorruptBlocksCount() throws IOException {
return getStateByIndex(ClientProtocol.
GET_STATS_CORRUPT_BLOCKS_IDX);
}
/**
* Returns number of bytes that reside in Blocks with future generation
* stamps.
* @return Bytes in Blocks with future generation stamps.
* @throws IOException
*/
public long getBytesInFutureBlocks() throws IOException {
return getStateByIndex(ClientProtocol.
GET_STATS_BYTES_IN_FUTURE_BLOCKS_IDX);
}
/**
* @return a list in which each entry describes a corrupt file/block
* @throws IOException
*/
public CorruptFileBlocks listCorruptFileBlocks(String path, String cookie)
throws IOException {
checkOpen();
try (TraceScope ignored
= newPathTraceScope("listCorruptFileBlocks", path)) {
return namenode.listCorruptFileBlocks(path, cookie);
}
}
public DatanodeInfo[] datanodeReport(DatanodeReportType type)
throws IOException {
checkOpen();
try (TraceScope ignored = tracer.newScope("datanodeReport")) {
return namenode.getDatanodeReport(type);
}
}
public DatanodeStorageReport[] getDatanodeStorageReport(
DatanodeReportType type) throws IOException {
checkOpen();
try (TraceScope ignored = tracer.newScope("datanodeStorageReport")) {
return namenode.getDatanodeStorageReport(type);
}
}
/**
* Enter, leave or get safe mode.
*
* @see ClientProtocol#setSafeMode(HdfsConstants.SafeModeAction,boolean)
*/
public boolean setSafeMode(SafeModeAction action) throws IOException {
checkOpen();
return setSafeMode(action, false);
}
/**
* Enter, leave or get safe mode.
*
* @param action
* One of SafeModeAction.GET, SafeModeAction.ENTER and
* SafeModeActiob.LEAVE
* @param isChecked
* If true, then check only active namenode's safemode status, else
* check first namenode's status.
* @see ClientProtocol#setSafeMode(HdfsConstants.SafeModeAction, boolean)
*/
public boolean setSafeMode(SafeModeAction action, boolean isChecked)
throws IOException{
try (TraceScope ignored = tracer.newScope("setSafeMode")) {
return namenode.setSafeMode(action, isChecked);
}
}
/**
* Create one snapshot.
*
* @param snapshotRoot The directory where the snapshot is to be taken
* @param snapshotName Name of the snapshot
* @return the snapshot path.
* @see ClientProtocol#createSnapshot(String, String)
*/
public String createSnapshot(String snapshotRoot, String snapshotName)
throws IOException {
checkOpen();
try (TraceScope ignored = tracer.newScope("createSnapshot")) {
return namenode.createSnapshot(snapshotRoot, snapshotName);
} catch (RemoteException re) {
throw re.unwrapRemoteException();
}
}
/**
* Delete a snapshot of a snapshottable directory.
*
* @param snapshotRoot The snapshottable directory that the
* to-be-deleted snapshot belongs to
* @param snapshotName The name of the to-be-deleted snapshot
* @throws IOException
* @see ClientProtocol#deleteSnapshot(String, String)
*/
public void deleteSnapshot(String snapshotRoot, String snapshotName)
throws IOException {
checkOpen();
try (TraceScope ignored = tracer.newScope("deleteSnapshot")) {
namenode.deleteSnapshot(snapshotRoot, snapshotName);
} catch (RemoteException re) {
throw re.unwrapRemoteException();
}
}
/**
* Rename a snapshot.
* @param snapshotDir The directory path where the snapshot was taken
* @param snapshotOldName Old name of the snapshot
* @param snapshotNewName New name of the snapshot
* @throws IOException
* @see ClientProtocol#renameSnapshot(String, String, String)
*/
public void renameSnapshot(String snapshotDir, String snapshotOldName,
String snapshotNewName) throws IOException {
checkOpen();
try (TraceScope ignored = tracer.newScope("renameSnapshot")) {
namenode.renameSnapshot(snapshotDir, snapshotOldName, snapshotNewName);
} catch (RemoteException re) {
throw re.unwrapRemoteException();
}
}
/**
* Get all the current snapshottable directories.
* @return All the current snapshottable directories
* @throws IOException
* @see ClientProtocol#getSnapshottableDirListing()
*/
public SnapshottableDirectoryStatus[] getSnapshottableDirListing()
throws IOException {
checkOpen();
try (TraceScope ignored = tracer.newScope("getSnapshottableDirListing")) {
return namenode.getSnapshottableDirListing();
} catch (RemoteException re) {
throw re.unwrapRemoteException();
}
}
/**
* Allow snapshot on a directory.
*
* @see ClientProtocol#allowSnapshot(String snapshotRoot)
*/
public void allowSnapshot(String snapshotRoot) throws IOException {
checkOpen();
try (TraceScope ignored = tracer.newScope("allowSnapshot")) {
namenode.allowSnapshot(snapshotRoot);
} catch (RemoteException re) {
throw re.unwrapRemoteException();
}
}
/**
* Disallow snapshot on a directory.
*
* @see ClientProtocol#disallowSnapshot(String snapshotRoot)
*/
public void disallowSnapshot(String snapshotRoot) throws IOException {
checkOpen();
try (TraceScope ignored = tracer.newScope("disallowSnapshot")) {
namenode.disallowSnapshot(snapshotRoot);
} catch (RemoteException re) {
throw re.unwrapRemoteException();
}
}
/**
* Get the difference between two snapshots, or between a snapshot and the
* current tree of a directory.
* @see ClientProtocol#getSnapshotDiffReport
*/
public SnapshotDiffReport getSnapshotDiffReport(String snapshotDir,
String fromSnapshot, String toSnapshot) throws IOException {
checkOpen();
try (TraceScope ignored = tracer.newScope("getSnapshotDiffReport")) {
Preconditions.checkArgument(fromSnapshot != null,
"null fromSnapshot");
Preconditions.checkArgument(toSnapshot != null,
"null toSnapshot");
return namenode
.getSnapshotDiffReport(snapshotDir, fromSnapshot, toSnapshot);
} catch (RemoteException re) {
throw re.unwrapRemoteException();
}
}
/**
* Get the difference between two snapshots of a directory iteratively.
* @see ClientProtocol#getSnapshotDiffReportListing
*/
public SnapshotDiffReportListing getSnapshotDiffReportListing(
String snapshotDir, String fromSnapshot, String toSnapshot,
byte[] startPath, int index) throws IOException {
checkOpen();
try (TraceScope ignored = tracer.newScope("getSnapshotDiffReport")) {
return namenode
.getSnapshotDiffReportListing(snapshotDir, fromSnapshot, toSnapshot,
startPath, index);
} catch (RemoteException re) {
throw re.unwrapRemoteException();
}
}
public long addCacheDirective(
CacheDirectiveInfo info, EnumSet flags) throws IOException {
checkOpen();
try (TraceScope ignored = tracer.newScope("addCacheDirective")) {
return namenode.addCacheDirective(info, flags);
} catch (RemoteException re) {
throw re.unwrapRemoteException();
}
}
public void modifyCacheDirective(
CacheDirectiveInfo info, EnumSet flags) throws IOException {
checkOpen();
try (TraceScope ignored = tracer.newScope("modifyCacheDirective")) {
namenode.modifyCacheDirective(info, flags);
} catch (RemoteException re) {
throw re.unwrapRemoteException();
}
}
public void removeCacheDirective(long id)
throws IOException {
checkOpen();
try (TraceScope ignored = tracer.newScope("removeCacheDirective")) {
namenode.removeCacheDirective(id);
} catch (RemoteException re) {
throw re.unwrapRemoteException();
}
}
public RemoteIterator listCacheDirectives(
CacheDirectiveInfo filter) throws IOException {
checkOpen();
return new CacheDirectiveIterator(namenode, filter, tracer);
}
public void addCachePool(CachePoolInfo info) throws IOException {
checkOpen();
try (TraceScope ignored = tracer.newScope("addCachePool")) {
namenode.addCachePool(info);
} catch (RemoteException re) {
throw re.unwrapRemoteException();
}
}
public void modifyCachePool(CachePoolInfo info) throws IOException {
checkOpen();
try (TraceScope ignored = tracer.newScope("modifyCachePool")) {
namenode.modifyCachePool(info);
} catch (RemoteException re) {
throw re.unwrapRemoteException();
}
}
public void removeCachePool(String poolName) throws IOException {
checkOpen();
try (TraceScope ignored = tracer.newScope("removeCachePool")) {
namenode.removeCachePool(poolName);
} catch (RemoteException re) {
throw re.unwrapRemoteException();
}
}
public RemoteIterator listCachePools() throws IOException {
checkOpen();
return new CachePoolIterator(namenode, tracer);
}
/**
* Save namespace image.
*
* @see ClientProtocol#saveNamespace(long, long)
*/
boolean saveNamespace(long timeWindow, long txGap) throws IOException {
checkOpen();
try (TraceScope ignored = tracer.newScope("saveNamespace")) {
return namenode.saveNamespace(timeWindow, txGap);
} catch (RemoteException re) {
throw re.unwrapRemoteException(AccessControlException.class);
}
}
/**
* Rolls the edit log on the active NameNode.
* @return the txid of the new log segment
*
* @see ClientProtocol#rollEdits()
*/
long rollEdits() throws IOException {
checkOpen();
try (TraceScope ignored = tracer.newScope("rollEdits")) {
return namenode.rollEdits();
} catch (RemoteException re) {
throw re.unwrapRemoteException(AccessControlException.class);
}
}
@VisibleForTesting
ExtendedBlock getPreviousBlock(long fileId) {
return filesBeingWritten.get(fileId).getBlock();
}
/**
* enable/disable restore failed storage.
*
* @see ClientProtocol#restoreFailedStorage(String arg)
*/
boolean restoreFailedStorage(String arg) throws IOException{
checkOpen();
try (TraceScope ignored = tracer.newScope("restoreFailedStorage")) {
return namenode.restoreFailedStorage(arg);
}
}
/**
* Refresh the hosts and exclude files. (Rereads them.)
* See {@link ClientProtocol#refreshNodes()}
* for more details.
*
* @see ClientProtocol#refreshNodes()
*/
public void refreshNodes() throws IOException {
checkOpen();
try (TraceScope ignored = tracer.newScope("refreshNodes")) {
namenode.refreshNodes();
}
}
/**
* Dumps DFS data structures into specified file.
*
* @see ClientProtocol#metaSave(String)
*/
public void metaSave(String pathname) throws IOException {
checkOpen();
try (TraceScope ignored = tracer.newScope("metaSave")) {
namenode.metaSave(pathname);
}
}
/**
* Requests the namenode to tell all datanodes to use a new, non-persistent
* bandwidth value for dfs.datanode.balance.bandwidthPerSec.
* See {@link ClientProtocol#setBalancerBandwidth(long)}
* for more details.
*
* @see ClientProtocol#setBalancerBandwidth(long)
*/
public void setBalancerBandwidth(long bandwidth) throws IOException {
checkOpen();
try (TraceScope ignored = tracer.newScope("setBalancerBandwidth")) {
namenode.setBalancerBandwidth(bandwidth);
}
}
/**
* @see ClientProtocol#finalizeUpgrade()
*/
public void finalizeUpgrade() throws IOException {
checkOpen();
try (TraceScope ignored = tracer.newScope("finalizeUpgrade")) {
namenode.finalizeUpgrade();
}
}
/**
* @see ClientProtocol#upgradeStatus()
*/
public boolean upgradeStatus() throws IOException {
checkOpen();
try (TraceScope ignored = tracer.newScope("isUpgradeFinalized")) {
return namenode.upgradeStatus();
}
}
RollingUpgradeInfo rollingUpgrade(RollingUpgradeAction action)
throws IOException {
checkOpen();
try (TraceScope ignored = tracer.newScope("rollingUpgrade")) {
return namenode.rollingUpgrade(action);
}
}
/**
*/
@Deprecated
public boolean mkdirs(String src) throws IOException {
return mkdirs(src, null, true);
}
/**
* Create a directory (or hierarchy of directories) with the given
* name and permission.
*
* @param src The path of the directory being created
* @param permission The permission of the directory being created.
* If permission == null, use {@link FsPermission#getDirDefault()}.
* @param createParent create missing parent directory if true
*
* @return True if the operation success.
*
* @see ClientProtocol#mkdirs(String, FsPermission, boolean)
*/
public boolean mkdirs(String src, FsPermission permission,
boolean createParent) throws IOException {
final FsPermission masked = applyUMaskDir(permission);
return primitiveMkdir(src, masked, createParent);
}
/**
* Same {{@link #mkdirs(String, FsPermission, boolean)} except
* that the permissions has already been masked against umask.
*/
public boolean primitiveMkdir(String src, FsPermission absPermission)
throws IOException {
return primitiveMkdir(src, absPermission, true);
}
/**
* Same {{@link #mkdirs(String, FsPermission, boolean)} except
* that the permissions has already been masked against umask.
*/
public boolean primitiveMkdir(String src, FsPermission absPermission,
boolean createParent) throws IOException {
checkOpen();
if (absPermission == null) {
absPermission = applyUMaskDir(null);
}
LOG.debug("{}: masked={}", src, absPermission);
try (TraceScope ignored = tracer.newScope("mkdir")) {
return namenode.mkdirs(src, absPermission, createParent);
} catch (RemoteException re) {
throw re.unwrapRemoteException(AccessControlException.class,
InvalidPathException.class,
FileAlreadyExistsException.class,
FileNotFoundException.class,
ParentNotDirectoryException.class,
SafeModeException.class,
NSQuotaExceededException.class,
DSQuotaExceededException.class,
QuotaByStorageTypeExceededException.class,
UnresolvedPathException.class,
SnapshotAccessControlException.class);
}
}
/**
* Get {@link ContentSummary} rooted at the specified directory.
* @param src The string representation of the path
*
* @see ClientProtocol#getContentSummary(String)
*/
ContentSummary getContentSummary(String src) throws IOException {
checkOpen();
try (TraceScope ignored = newPathTraceScope("getContentSummary", src)) {
return namenode.getContentSummary(src);
} catch (RemoteException re) {
throw re.unwrapRemoteException(AccessControlException.class,
FileNotFoundException.class,
UnresolvedPathException.class);
}
}
/**
* Get {@link QuotaUsage} rooted at the specified directory.
* @param src The string representation of the path
*
* @see ClientProtocol#getQuotaUsage(String)
*/
QuotaUsage getQuotaUsage(String src) throws IOException {
checkOpen();
try (TraceScope ignored = newPathTraceScope("getQuotaUsage", src)) {
return namenode.getQuotaUsage(src);
} catch(RemoteException re) {
IOException ioe = re.unwrapRemoteException(AccessControlException.class,
FileNotFoundException.class,
UnresolvedPathException.class,
RpcNoSuchMethodException.class);
if (ioe instanceof RpcNoSuchMethodException) {
LOG.debug("The version of namenode doesn't support getQuotaUsage API." +
" Fall back to use getContentSummary API.");
return getContentSummary(src);
} else {
throw ioe;
}
}
}
/**
* Sets or resets quotas for a directory.
* @see ClientProtocol#setQuota(String, long, long, StorageType)
*/
void setQuota(String src, long namespaceQuota, long storagespaceQuota)
throws IOException {
checkOpen();
// sanity check
if ((namespaceQuota <= 0 &&
namespaceQuota != HdfsConstants.QUOTA_DONT_SET &&
namespaceQuota != HdfsConstants.QUOTA_RESET) ||
(storagespaceQuota < 0 &&
storagespaceQuota != HdfsConstants.QUOTA_DONT_SET &&
storagespaceQuota != HdfsConstants.QUOTA_RESET)) {
throw new IllegalArgumentException("Invalid values for quota : " +
namespaceQuota + " and " +
storagespaceQuota);
}
try (TraceScope ignored = newPathTraceScope("setQuota", src)) {
// Pass null as storage type for traditional namespace/storagespace quota.
namenode.setQuota(src, namespaceQuota, storagespaceQuota, null);
} catch (RemoteException re) {
throw re.unwrapRemoteException(AccessControlException.class,
FileNotFoundException.class,
NSQuotaExceededException.class,
DSQuotaExceededException.class,
QuotaByStorageTypeExceededException.class,
UnresolvedPathException.class,
SnapshotAccessControlException.class);
}
}
/**
* Sets or resets quotas by storage type for a directory.
* @see ClientProtocol#setQuota(String, long, long, StorageType)
*/
void setQuotaByStorageType(String src, StorageType type, long quota)
throws IOException {
checkOpen();
if (quota <= 0 && quota != HdfsConstants.QUOTA_DONT_SET &&
quota != HdfsConstants.QUOTA_RESET) {
throw new IllegalArgumentException("Invalid values for quota :" +
quota);
}
if (type == null) {
throw new IllegalArgumentException("Invalid storage type(null)");
}
if (!type.supportTypeQuota()) {
throw new IllegalArgumentException(
"Don't support Quota for storage type : " + type.toString());
}
try (TraceScope ignored = newPathTraceScope("setQuotaByStorageType", src)) {
namenode.setQuota(src, HdfsConstants.QUOTA_DONT_SET, quota, type);
} catch (RemoteException re) {
throw re.unwrapRemoteException(AccessControlException.class,
FileNotFoundException.class,
QuotaByStorageTypeExceededException.class,
UnresolvedPathException.class,
SnapshotAccessControlException.class);
}
}
/**
* set the modification and access time of a file
*
* @see ClientProtocol#setTimes(String, long, long)
*/
public void setTimes(String src, long mtime, long atime) throws IOException {
checkOpen();
try (TraceScope ignored = newPathTraceScope("setTimes", src)) {
namenode.setTimes(src, mtime, atime);
} catch (RemoteException re) {
throw re.unwrapRemoteException(AccessControlException.class,
FileNotFoundException.class,
UnresolvedPathException.class,
SnapshotAccessControlException.class);
}
}
/**
* @deprecated use {@link HdfsDataInputStream} instead.
*/
@Deprecated
public static class DFSDataInputStream extends HdfsDataInputStream {
public DFSDataInputStream(DFSInputStream in) throws IOException {
super(in);
}
}
void reportChecksumFailure(String file, ExtendedBlock blk, DatanodeInfo dn) {
DatanodeInfo [] dnArr = { dn };
LocatedBlock [] lblocks = { new LocatedBlock(blk, dnArr) };
reportChecksumFailure(file, lblocks);
}
// just reports checksum failure and ignores any exception during the report.
void reportChecksumFailure(String file, LocatedBlock lblocks[]) {
try {
reportBadBlocks(lblocks);
} catch (IOException ie) {
LOG.info("Found corruption while reading " + file
+ ". Error repairing corrupt blocks. Bad blocks remain.", ie);
}
}
@Override
public String toString() {
return getClass().getSimpleName() + "[clientName=" + clientName
+ ", ugi=" + ugi + "]";
}
public CachingStrategy getDefaultReadCachingStrategy() {
return defaultReadCachingStrategy;
}
public CachingStrategy getDefaultWriteCachingStrategy() {
return defaultWriteCachingStrategy;
}
public ClientContext getClientContext() {
return clientContext;
}
public void modifyAclEntries(String src, List aclSpec)
throws IOException {
checkOpen();
try (TraceScope ignored = newPathTraceScope("modifyAclEntries", src)) {
namenode.modifyAclEntries(src, aclSpec);
} catch (RemoteException re) {
throw re.unwrapRemoteException(AccessControlException.class,
AclException.class,
FileNotFoundException.class,
NSQuotaExceededException.class,
SafeModeException.class,
SnapshotAccessControlException.class,
UnresolvedPathException.class);
}
}
public void removeAclEntries(String src, List aclSpec)
throws IOException {
checkOpen();
try (TraceScope ignored = tracer.newScope("removeAclEntries")) {
namenode.removeAclEntries(src, aclSpec);
} catch (RemoteException re) {
throw re.unwrapRemoteException(AccessControlException.class,
AclException.class,
FileNotFoundException.class,
NSQuotaExceededException.class,
SafeModeException.class,
SnapshotAccessControlException.class,
UnresolvedPathException.class);
}
}
public void removeDefaultAcl(String src) throws IOException {
checkOpen();
try (TraceScope ignored = tracer.newScope("removeDefaultAcl")) {
namenode.removeDefaultAcl(src);
} catch (RemoteException re) {
throw re.unwrapRemoteException(AccessControlException.class,
AclException.class,
FileNotFoundException.class,
NSQuotaExceededException.class,
SafeModeException.class,
SnapshotAccessControlException.class,
UnresolvedPathException.class);
}
}
public void removeAcl(String src) throws IOException {
checkOpen();
try (TraceScope ignored = tracer.newScope("removeAcl")) {
namenode.removeAcl(src);
} catch (RemoteException re) {
throw re.unwrapRemoteException(AccessControlException.class,
AclException.class,
FileNotFoundException.class,
NSQuotaExceededException.class,
SafeModeException.class,
SnapshotAccessControlException.class,
UnresolvedPathException.class);
}
}
public void setAcl(String src, List aclSpec) throws IOException {
checkOpen();
try (TraceScope ignored = tracer.newScope("setAcl")) {
namenode.setAcl(src, aclSpec);
} catch (RemoteException re) {
throw re.unwrapRemoteException(AccessControlException.class,
AclException.class,
FileNotFoundException.class,
NSQuotaExceededException.class,
SafeModeException.class,
SnapshotAccessControlException.class,
UnresolvedPathException.class);
}
}
public AclStatus getAclStatus(String src) throws IOException {
checkOpen();
try (TraceScope ignored = newPathTraceScope("getAclStatus", src)) {
return namenode.getAclStatus(src);
} catch (RemoteException re) {
throw re.unwrapRemoteException(AccessControlException.class,
AclException.class,
FileNotFoundException.class,
UnresolvedPathException.class);
}
}
public void createEncryptionZone(String src, String keyName)
throws IOException {
checkOpen();
try (TraceScope ignored = newPathTraceScope("createEncryptionZone", src)) {
namenode.createEncryptionZone(src, keyName);
} catch (RemoteException re) {
throw re.unwrapRemoteException(AccessControlException.class,
SafeModeException.class,
UnresolvedPathException.class);
}
}
public EncryptionZone getEZForPath(String src) throws IOException {
checkOpen();
try (TraceScope ignored = newPathTraceScope("getEZForPath", src)) {
return namenode.getEZForPath(src);
} catch (RemoteException re) {
throw re.unwrapRemoteException(AccessControlException.class,
UnresolvedPathException.class);
}
}
public RemoteIterator listEncryptionZones()
throws IOException {
checkOpen();
return new EncryptionZoneIterator(namenode, tracer);
}
public void reencryptEncryptionZone(String zone, ReencryptAction action)
throws IOException {
checkOpen();
try (TraceScope ignored = newPathTraceScope("reencryptEncryptionZone",
zone)) {
namenode.reencryptEncryptionZone(zone, action);
} catch (RemoteException re) {
throw re.unwrapRemoteException(AccessControlException.class,
SafeModeException.class, UnresolvedPathException.class);
}
}
public RemoteIterator listReencryptionStatus()
throws IOException {
checkOpen();
return new ReencryptionStatusIterator(namenode, tracer);
}
public void setErasureCodingPolicy(String src, String ecPolicyName)
throws IOException {
checkOpen();
try (TraceScope ignored =
newPathTraceScope("setErasureCodingPolicy", src)) {
namenode.setErasureCodingPolicy(src, ecPolicyName);
} catch (RemoteException re) {
throw re.unwrapRemoteException(AccessControlException.class,
SafeModeException.class,
UnresolvedPathException.class,
FileNotFoundException.class);
}
}
public void unsetErasureCodingPolicy(String src) throws IOException {
checkOpen();
try (TraceScope ignored =
newPathTraceScope("unsetErasureCodingPolicy", src)) {
namenode.unsetErasureCodingPolicy(src);
} catch (RemoteException re) {
throw re.unwrapRemoteException(AccessControlException.class,
SafeModeException.class,
UnresolvedPathException.class,
FileNotFoundException.class);
}
}
public void setXAttr(String src, String name, byte[] value,
EnumSet flag) throws IOException {
checkOpen();
try (TraceScope ignored = newPathTraceScope("setXAttr", src)) {
namenode.setXAttr(src, XAttrHelper.buildXAttr(name, value), flag);
} catch (RemoteException re) {
throw re.unwrapRemoteException(AccessControlException.class,
FileNotFoundException.class,
NSQuotaExceededException.class,
SafeModeException.class,
SnapshotAccessControlException.class,
UnresolvedPathException.class);
}
}
public byte[] getXAttr(String src, String name) throws IOException {
checkOpen();
try (TraceScope ignored = newPathTraceScope("getXAttr", src)) {
final List xAttrs = XAttrHelper.buildXAttrAsList(name);
final List result = namenode.getXAttrs(src, xAttrs);
return XAttrHelper.getFirstXAttrValue(result);
} catch (RemoteException re) {
throw re.unwrapRemoteException(AccessControlException.class,
FileNotFoundException.class,
UnresolvedPathException.class);
}
}
public Map getXAttrs(String src) throws IOException {
checkOpen();
try (TraceScope ignored = newPathTraceScope("getXAttrs", src)) {
return XAttrHelper.buildXAttrMap(namenode.getXAttrs(src, null));
} catch (RemoteException re) {
throw re.unwrapRemoteException(AccessControlException.class,
FileNotFoundException.class,
UnresolvedPathException.class);
}
}
public Map getXAttrs(String src, List names)
throws IOException {
checkOpen();
try (TraceScope ignored = newPathTraceScope("getXAttrs", src)) {
return XAttrHelper.buildXAttrMap(namenode.getXAttrs(
src, XAttrHelper.buildXAttrs(names)));
} catch (RemoteException re) {
throw re.unwrapRemoteException(AccessControlException.class,
FileNotFoundException.class,
UnresolvedPathException.class);
}
}
public List listXAttrs(String src) throws IOException {
checkOpen();
try (TraceScope ignored = newPathTraceScope("listXAttrs", src)) {
final Map xattrs =
XAttrHelper.buildXAttrMap(namenode.listXAttrs(src));
return Lists.newArrayList(xattrs.keySet());
} catch (RemoteException re) {
throw re.unwrapRemoteException(AccessControlException.class,
FileNotFoundException.class,
UnresolvedPathException.class);
}
}
public void removeXAttr(String src, String name) throws IOException {
checkOpen();
try (TraceScope ignored = newPathTraceScope("removeXAttr", src)) {
namenode.removeXAttr(src, XAttrHelper.buildXAttr(name));
} catch (RemoteException re) {
throw re.unwrapRemoteException(AccessControlException.class,
FileNotFoundException.class,
NSQuotaExceededException.class,
SafeModeException.class,
SnapshotAccessControlException.class,
UnresolvedPathException.class);
}
}
public void checkAccess(String src, FsAction mode) throws IOException {
checkOpen();
try (TraceScope ignored = newPathTraceScope("checkAccess", src)) {
namenode.checkAccess(src, mode);
} catch (RemoteException re) {
throw re.unwrapRemoteException(AccessControlException.class,
FileNotFoundException.class,
UnresolvedPathException.class);
}
}
public ErasureCodingPolicyInfo[] getErasureCodingPolicies()
throws IOException {
checkOpen();
try (TraceScope ignored = tracer.newScope("getErasureCodingPolicies")) {
return namenode.getErasureCodingPolicies();
}
}
public Map getErasureCodingCodecs() throws IOException {
checkOpen();
try (TraceScope ignored = tracer.newScope("getErasureCodingCodecs")) {
return namenode.getErasureCodingCodecs();
}
}
public AddErasureCodingPolicyResponse[] addErasureCodingPolicies(
ErasureCodingPolicy[] policies) throws IOException {
checkOpen();
try (TraceScope ignored = tracer.newScope("addErasureCodingPolicies")) {
return namenode.addErasureCodingPolicies(policies);
} catch (RemoteException re) {
throw re.unwrapRemoteException(AccessControlException.class,
SafeModeException.class);
}
}
public void removeErasureCodingPolicy(String ecPolicyName)
throws IOException {
checkOpen();
try (TraceScope ignored = tracer.newScope("removeErasureCodingPolicy")) {
namenode.removeErasureCodingPolicy(ecPolicyName);
} catch (RemoteException re) {
throw re.unwrapRemoteException(AccessControlException.class,
SafeModeException.class);
}
}
public void enableErasureCodingPolicy(String ecPolicyName)
throws IOException {
checkOpen();
try (TraceScope ignored = tracer.newScope("enableErasureCodingPolicy")) {
namenode.enableErasureCodingPolicy(ecPolicyName);
} catch (RemoteException re) {
throw re.unwrapRemoteException(AccessControlException.class,
SafeModeException.class);
}
}
public void disableErasureCodingPolicy(String ecPolicyName)
throws IOException {
checkOpen();
try (TraceScope ignored = tracer.newScope("disableErasureCodingPolicy")) {
namenode.disableErasureCodingPolicy(ecPolicyName);
} catch (RemoteException re) {
throw re.unwrapRemoteException(AccessControlException.class,
SafeModeException.class);
}
}
public DFSInotifyEventInputStream getInotifyEventStream() throws IOException {
checkOpen();
return new DFSInotifyEventInputStream(namenode, tracer);
}
public DFSInotifyEventInputStream getInotifyEventStream(long lastReadTxid)
throws IOException {
checkOpen();
return new DFSInotifyEventInputStream(namenode, tracer,
lastReadTxid);
}
@Override // RemotePeerFactory
public Peer newConnectedPeer(InetSocketAddress addr,
Token blockToken, DatanodeID datanodeId)
throws IOException {
Peer peer = null;
boolean success = false;
Socket sock = null;
final int socketTimeout = dfsClientConf.getSocketTimeout();
try {
sock = socketFactory.createSocket();
NetUtils.connect(sock, addr, getRandomLocalInterfaceAddr(),
socketTimeout);
peer = DFSUtilClient.peerFromSocketAndKey(saslClient, sock, this,
blockToken, datanodeId, socketTimeout);
success = true;
return peer;
} finally {
if (!success) {
IOUtilsClient.cleanup(LOG, peer);
IOUtils.closeSocket(sock);
}
}
}
void updateFileSystemReadStats(int distance, int nRead) {
if (stats != null) {
stats.incrementBytesRead(nRead);
stats.incrementBytesReadByDistance(distance, nRead);
}
}
/**
* Create hedged reads thread pool, HEDGED_READ_THREAD_POOL, if
* it does not already exist.
* @param num Number of threads for hedged reads thread pool.
* If zero, skip hedged reads thread pool creation.
*/
private static synchronized void initThreadsNumForHedgedReads(int num) {
if (num <= 0 || HEDGED_READ_THREAD_POOL != null) return;
HEDGED_READ_THREAD_POOL = new ThreadPoolExecutor(1, num, 60,
TimeUnit.SECONDS, new SynchronousQueue(),
new Daemon.DaemonFactory() {
private final AtomicInteger threadIndex = new AtomicInteger(0);
@Override
public Thread newThread(Runnable r) {
Thread t = super.newThread(r);
t.setName("hedgedRead-" + threadIndex.getAndIncrement());
return t;
}
},
new ThreadPoolExecutor.CallerRunsPolicy() {
@Override
public void rejectedExecution(Runnable runnable,
ThreadPoolExecutor e) {
LOG.info("Execution rejected, Executing in current thread");
HEDGED_READ_METRIC.incHedgedReadOpsInCurThread();
// will run in the current thread
super.rejectedExecution(runnable, e);
}
});
HEDGED_READ_THREAD_POOL.allowCoreThreadTimeOut(true);
LOG.debug("Using hedged reads; pool threads={}", num);
}
/**
* Create thread pool for parallel reading in striped layout,
* STRIPED_READ_THREAD_POOL, if it does not already exist.
* @param numThreads Number of threads for striped reads thread pool.
*/
private void initThreadsNumForStripedReads(int numThreads) {
assert numThreads > 0;
if (STRIPED_READ_THREAD_POOL != null) {
return;
}
synchronized (DFSClient.class) {
if (STRIPED_READ_THREAD_POOL == null) {
// Only after thread pool is fully constructed then save it to
// volatile field.
ThreadPoolExecutor threadPool = DFSUtilClient.getThreadPoolExecutor(1,
numThreads, 60, "StripedRead-", true);
threadPool.allowCoreThreadTimeOut(true);
STRIPED_READ_THREAD_POOL = threadPool;
}
}
}
ThreadPoolExecutor getHedgedReadsThreadPool() {
return HEDGED_READ_THREAD_POOL;
}
ThreadPoolExecutor getStripedReadsThreadPool() {
return STRIPED_READ_THREAD_POOL;
}
boolean isHedgedReadsEnabled() {
return (HEDGED_READ_THREAD_POOL != null) &&
HEDGED_READ_THREAD_POOL.getMaximumPoolSize() > 0;
}
DFSHedgedReadMetrics getHedgedReadMetrics() {
return HEDGED_READ_METRIC;
}
@Override
public URI getKeyProviderUri() throws IOException {
return HdfsKMSUtil.getKeyProviderUri(ugi, namenodeUri,
getServerDefaults().getKeyProviderUri(), conf);
}
public KeyProvider getKeyProvider() throws IOException {
return clientContext.getKeyProviderCache().get(conf, getKeyProviderUri());
}
@VisibleForTesting
public void setKeyProvider(KeyProvider provider) {
clientContext.getKeyProviderCache().setKeyProvider(conf, provider);
}
/**
* Probe for encryption enabled on this filesystem.
* @return true if encryption is enabled
*/
boolean isHDFSEncryptionEnabled() throws IOException {
return getKeyProviderUri() != null;
}
/**
* Returns the SaslDataTransferClient configured for this DFSClient.
*
* @return SaslDataTransferClient configured for this DFSClient
*/
public SaslDataTransferClient getSaslDataTransferClient() {
return saslClient;
}
TraceScope newPathTraceScope(String description, String path) {
TraceScope scope = tracer.newScope(description);
if (path != null) {
scope.addKVAnnotation("path", path);
}
return scope;
}
TraceScope newSrcDstTraceScope(String description, String src, String dst) {
TraceScope scope = tracer.newScope(description);
if (src != null) {
scope.addKVAnnotation("src", src);
}
if (dst != null) {
scope.addKVAnnotation("dst", dst);
}
return scope;
}
/**
* Get the erasure coding policy information for the specified path
*
* @param src path to get the information for
* @return Returns the policy information if file or directory on the path is
* erasure coded, null otherwise. Null will be returned if directory or file
* has REPLICATION policy.
* @throws IOException
*/
public ErasureCodingPolicy getErasureCodingPolicy(String src)
throws IOException {
checkOpen();
try (TraceScope ignored =
newPathTraceScope("getErasureCodingPolicy", src)) {
return namenode.getErasureCodingPolicy(src);
} catch (RemoteException re) {
throw re.unwrapRemoteException(FileNotFoundException.class,
AccessControlException.class, UnresolvedPathException.class);
}
}
Tracer getTracer() {
return tracer;
}
/**
* Get a remote iterator to the open files list managed by NameNode.
*
* @throws IOException
*/
@Deprecated
public RemoteIterator listOpenFiles() throws IOException {
checkOpen();
return listOpenFiles(EnumSet.of(OpenFilesType.ALL_OPEN_FILES),
OpenFilesIterator.FILTER_PATH_DEFAULT);
}
/**
* Get a remote iterator to the open files list by path,
* managed by NameNode.
*
* @param path
* @throws IOException
*/
public RemoteIterator listOpenFiles(String path)
throws IOException {
checkOpen();
return listOpenFiles(EnumSet.of(OpenFilesType.ALL_OPEN_FILES), path);
}
/**
* Get a remote iterator to the open files list by type,
* managed by NameNode.
*
* @param openFilesTypes
* @throws IOException
*/
public RemoteIterator listOpenFiles(
EnumSet openFilesTypes) throws IOException {
checkOpen();
return listOpenFiles(openFilesTypes,
OpenFilesIterator.FILTER_PATH_DEFAULT);
}
/**
* Get a remote iterator to the open files list by type and path,
* managed by NameNode.
*
* @param openFilesTypes
* @param path
* @throws IOException
*/
public RemoteIterator listOpenFiles(
EnumSet openFilesTypes, String path) throws IOException {
checkOpen();
return new OpenFilesIterator(namenode, tracer, openFilesTypes, path);
}
}
