hadoop RouterClientProtocol 源码
haddop RouterClientProtocol 代码
文件路径：/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/RouterClientProtocol.java
/**
* 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.server.federation.router;
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.server.federation.router.FederationUtil.updateMountPointStatus;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.crypto.CryptoProtocolVersion;
import org.apache.hadoop.fs.BatchedRemoteIterator.BatchedEntries;
import org.apache.hadoop.fs.CacheFlag;
import org.apache.hadoop.fs.ContentSummary;
import org.apache.hadoop.fs.CreateFlag;
import org.apache.hadoop.fs.FsServerDefaults;
import org.apache.hadoop.fs.Options;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.QuotaUsage;
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.FsPermission;
import org.apache.hadoop.ha.HAServiceProtocol;
import org.apache.hadoop.hdfs.AddBlockFlag;
import org.apache.hadoop.hdfs.DFSConfigKeys;
import org.apache.hadoop.hdfs.DFSUtil;
import org.apache.hadoop.hdfs.inotify.EventBatchList;
import org.apache.hadoop.hdfs.protocol.AddErasureCodingPolicyResponse;
import org.apache.hadoop.hdfs.protocol.BatchedDirectoryListing;
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.CachePoolEntry;
import org.apache.hadoop.hdfs.protocol.CachePoolInfo;
import org.apache.hadoop.hdfs.protocol.ClientProtocol;
import org.apache.hadoop.hdfs.protocol.CorruptFileBlocks;
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.ECBlockGroupStats;
import org.apache.hadoop.hdfs.protocol.ECTopologyVerifierResult;
import org.apache.hadoop.hdfs.protocol.EncryptionZone;
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.HdfsFileStatus;
import org.apache.hadoop.hdfs.protocol.HdfsLocatedFileStatus;
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.OpenFileEntry;
import org.apache.hadoop.hdfs.protocol.OpenFilesIterator;
import org.apache.hadoop.hdfs.protocol.ReplicatedBlockStats;
import org.apache.hadoop.hdfs.protocol.RollingUpgradeInfo;
import org.apache.hadoop.hdfs.protocol.SnapshotDiffReport;
import org.apache.hadoop.hdfs.protocol.SnapshotDiffReportListing;
import org.apache.hadoop.hdfs.protocol.SnapshottableDirectoryStatus;
import org.apache.hadoop.hdfs.protocol.SnapshotStatus;
import org.apache.hadoop.hdfs.protocol.UnresolvedPathException;
import org.apache.hadoop.hdfs.protocol.ZoneReencryptionStatus;
import org.apache.hadoop.hdfs.security.token.block.DataEncryptionKey;
import org.apache.hadoop.hdfs.security.token.delegation.DelegationTokenIdentifier;
import org.apache.hadoop.hdfs.server.federation.resolver.ActiveNamenodeResolver;
import org.apache.hadoop.hdfs.server.federation.resolver.FederationNamespaceInfo;
import org.apache.hadoop.hdfs.server.federation.resolver.FileSubclusterResolver;
import org.apache.hadoop.hdfs.server.federation.resolver.MountTableResolver;
import org.apache.hadoop.hdfs.server.federation.resolver.RemoteLocation;
import org.apache.hadoop.hdfs.server.federation.resolver.RouterResolveException;
import org.apache.hadoop.hdfs.server.federation.router.security.RouterSecurityManager;
import org.apache.hadoop.hdfs.server.federation.store.records.MountTable;
import org.apache.hadoop.hdfs.server.namenode.NameNode;
import org.apache.hadoop.hdfs.server.protocol.DatanodeStorageReport;
import org.apache.hadoop.io.EnumSetWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.net.ConnectTimeoutException;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.hadoop.security.token.Token;
import org.apache.hadoop.util.Time;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.hadoop.classification.VisibleForTesting;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.net.ConnectException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.EnumSet;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.TreeMap;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;
/**
* Module that implements all the RPC calls in {@link ClientProtocol} in the
* {@link RouterRpcServer}.
*/
public class RouterClientProtocol implements ClientProtocol {
private static final Logger LOG =
LoggerFactory.getLogger(RouterClientProtocol.class.getName());
private final RouterRpcServer rpcServer;
private final RouterRpcClient rpcClient;
private final RouterFederationRename rbfRename;
private final FileSubclusterResolver subclusterResolver;
private final ActiveNamenodeResolver namenodeResolver;
/**
* Caching server defaults so as to prevent redundant calls to namenode,
* similar to DFSClient, caching saves efforts when router connects
* to multiple clients.
*/
private volatile FsServerDefaults serverDefaults;
private volatile long serverDefaultsLastUpdate;
private final long serverDefaultsValidityPeriod;
/** If it requires response from all subclusters. */
private final boolean allowPartialList;
/** Time out when getting the mount statistics. */
private long mountStatusTimeOut;
/** Identifier for the super user. */
private String superUser;
/** Identifier for the super group. */
private final String superGroup;
/** Erasure coding calls. */
private final ErasureCoding erasureCoding;
/** Cache Admin calls. */
private final RouterCacheAdmin routerCacheAdmin;
/** StoragePolicy calls. **/
private final RouterStoragePolicy storagePolicy;
/** Snapshot calls. */
private final RouterSnapshot snapshotProto;
/** Router security manager to handle token operations. */
private RouterSecurityManager securityManager = null;
RouterClientProtocol(Configuration conf, RouterRpcServer rpcServer) {
this.rpcServer = rpcServer;
this.rpcClient = rpcServer.getRPCClient();
this.subclusterResolver = rpcServer.getSubclusterResolver();
this.namenodeResolver = rpcServer.getNamenodeResolver();
this.allowPartialList = conf.getBoolean(
RBFConfigKeys.DFS_ROUTER_ALLOW_PARTIAL_LIST,
RBFConfigKeys.DFS_ROUTER_ALLOW_PARTIAL_LIST_DEFAULT);
this.mountStatusTimeOut = conf.getTimeDuration(
RBFConfigKeys.DFS_ROUTER_CLIENT_MOUNT_TIME_OUT,
RBFConfigKeys.DFS_ROUTER_CLIENT_MOUNT_TIME_OUT_DEFAULT,
TimeUnit.MILLISECONDS);
this.serverDefaultsValidityPeriod = conf.getTimeDuration(
DFS_CLIENT_SERVER_DEFAULTS_VALIDITY_PERIOD_MS_KEY,
DFS_CLIENT_SERVER_DEFAULTS_VALIDITY_PERIOD_MS_DEFAULT,
TimeUnit.MILLISECONDS);
// User and group for reporting
try {
this.superUser = UserGroupInformation.getCurrentUser().getShortUserName();
} catch (IOException ex) {
LOG.warn("Unable to get user name. Fall back to system property " +
"user.name", ex);
this.superUser = System.getProperty("user.name");
}
this.superGroup = conf.get(
DFSConfigKeys.DFS_PERMISSIONS_SUPERUSERGROUP_KEY,
DFSConfigKeys.DFS_PERMISSIONS_SUPERUSERGROUP_DEFAULT);
this.erasureCoding = new ErasureCoding(rpcServer);
this.storagePolicy = new RouterStoragePolicy(rpcServer);
this.snapshotProto = new RouterSnapshot(rpcServer);
this.routerCacheAdmin = new RouterCacheAdmin(rpcServer);
this.securityManager = rpcServer.getRouterSecurityManager();
this.rbfRename = new RouterFederationRename(rpcServer, conf);
}
@Override
public Token<DelegationTokenIdentifier> getDelegationToken(Text renewer)
throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.WRITE, true);
return this.securityManager.getDelegationToken(renewer);
}
/**
* The the delegation token from each name service.
*
* @param renewer The token renewer.
* @return Name service to Token.
* @throws IOException If it cannot get the delegation token.
*/
public Map<FederationNamespaceInfo, Token<DelegationTokenIdentifier>>
getDelegationTokens(Text renewer) throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.WRITE, false);
return null;
}
@Override
public long renewDelegationToken(Token<DelegationTokenIdentifier> token)
throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.WRITE, true);
return this.securityManager.renewDelegationToken(token);
}
@Override
public void cancelDelegationToken(Token<DelegationTokenIdentifier> token)
throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.WRITE, true);
this.securityManager.cancelDelegationToken(token);
return;
}
@Override
public LocatedBlocks getBlockLocations(String src, final long offset,
final long length) throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.READ);
List<RemoteLocation> locations =
rpcServer.getLocationsForPath(src, false, false);
RemoteMethod remoteMethod = new RemoteMethod("getBlockLocations",
new Class<?>[] {String.class, long.class, long.class},
new RemoteParam(), offset, length);
return rpcClient.invokeSequential(locations, remoteMethod,
LocatedBlocks.class, null);
}
@Override
public FsServerDefaults getServerDefaults() throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.READ);
long now = Time.monotonicNow();
if ((serverDefaults == null) || (now - serverDefaultsLastUpdate
> serverDefaultsValidityPeriod)) {
RemoteMethod method = new RemoteMethod("getServerDefaults");
serverDefaults =
rpcServer.invokeAtAvailableNs(method, FsServerDefaults.class);
serverDefaultsLastUpdate = now;
}
return serverDefaults;
}
@Override
public HdfsFileStatus create(String src, FsPermission masked,
String clientName, EnumSetWritable<CreateFlag> flag,
boolean createParent, short replication, long blockSize,
CryptoProtocolVersion[] supportedVersions, String ecPolicyName,
String storagePolicy)
throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.WRITE);
if (createParent && rpcServer.isPathAll(src)) {
int index = src.lastIndexOf(Path.SEPARATOR);
String parent = src.substring(0, index);
LOG.debug("Creating {} requires creating parent {}", src, parent);
FsPermission parentPermissions = getParentPermission(masked);
boolean success = mkdirs(parent, parentPermissions, createParent);
if (!success) {
// This shouldn't happen as mkdirs returns true or exception
LOG.error("Couldn't create parents for {}", src);
}
}
RemoteMethod method = new RemoteMethod("create",
new Class<?>[] {String.class, FsPermission.class, String.class,
EnumSetWritable.class, boolean.class, short.class,
long.class, CryptoProtocolVersion[].class,
String.class, String.class},
new RemoteParam(), masked, clientName, flag, createParent,
replication, blockSize, supportedVersions, ecPolicyName, storagePolicy);
final List<RemoteLocation> locations =
rpcServer.getLocationsForPath(src, true);
RemoteLocation createLocation = null;
try {
createLocation = rpcServer.getCreateLocation(src, locations);
HdfsFileStatus status = rpcClient.invokeSingle(createLocation, method,
HdfsFileStatus.class);
status.setNamespace(createLocation.getNameserviceId());
return status;
} catch (IOException ioe) {
final List<RemoteLocation> newLocations = checkFaultTolerantRetry(
method, src, ioe, createLocation, locations);
return rpcClient.invokeSequential(
newLocations, method, HdfsFileStatus.class, null);
}
}
/**
* Check if an exception is caused by an unavailable subcluster or not. It
* also checks the causes.
* @param ioe IOException to check.
* @return If caused by an unavailable subcluster. False if they should not be
* retried (e.g., NSQuotaExceededException).
*/
protected static boolean isUnavailableSubclusterException(
final IOException ioe) {
if (ioe instanceof ConnectException ||
ioe instanceof ConnectTimeoutException ||
ioe instanceof NoNamenodesAvailableException) {
return true;
}
if (ioe.getCause() instanceof IOException) {
IOException cause = (IOException)ioe.getCause();
return isUnavailableSubclusterException(cause);
}
return false;
}
/**
* Check if a remote method can be retried in other subclusters when it
* failed in the original destination. This method returns the list of
* locations to retry in. This is used by fault tolerant mount points.
* @param method Method that failed and might be retried.
* @param src Path where the method was invoked.
* @param ioe Exception that was triggered.
* @param excludeLoc Location that failed and should be excluded.
* @param locations All the locations to retry.
* @return The locations where we should retry (excluding the failed ones).
* @throws IOException If this path is not fault tolerant or the exception
* should not be retried (e.g., NSQuotaExceededException).
*/
private List<RemoteLocation> checkFaultTolerantRetry(
final RemoteMethod method, final String src, final IOException ioe,
final RemoteLocation excludeLoc, final List<RemoteLocation> locations)
throws IOException {
if (!isUnavailableSubclusterException(ioe)) {
LOG.debug("{} exception cannot be retried",
ioe.getClass().getSimpleName());
throw ioe;
}
if (!rpcServer.isPathFaultTolerant(src)) {
LOG.debug("{} does not allow retrying a failed subcluster", src);
throw ioe;
}
final List<RemoteLocation> newLocations;
if (excludeLoc == null) {
LOG.error("Cannot invoke {} for {}: {}", method, src, ioe.getMessage());
newLocations = locations;
} else {
LOG.error("Cannot invoke {} for {} in {}: {}",
method, src, excludeLoc, ioe.getMessage());
newLocations = new ArrayList<>();
for (final RemoteLocation loc : locations) {
if (!loc.equals(excludeLoc)) {
newLocations.add(loc);
}
}
}
LOG.info("{} allows retrying failed subclusters in {}", src, newLocations);
return newLocations;
}
@Override
public LastBlockWithStatus append(String src, final String clientName,
final EnumSetWritable<CreateFlag> flag) throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.WRITE);
List<RemoteLocation> locations = rpcServer.getLocationsForPath(src, true);
RemoteMethod method = new RemoteMethod("append",
new Class<?>[] {String.class, String.class, EnumSetWritable.class},
new RemoteParam(), clientName, flag);
RemoteResult result = rpcClient.invokeSequential(
method, locations, LastBlockWithStatus.class, null);
LastBlockWithStatus lbws = (LastBlockWithStatus) result.getResult();
lbws.getFileStatus().setNamespace(result.getLocation().getNameserviceId());
return lbws;
}
@Override
public boolean recoverLease(String src, String clientName)
throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.WRITE);
final List<RemoteLocation> locations =
rpcServer.getLocationsForPath(src, true, false);
RemoteMethod method = new RemoteMethod("recoverLease",
new Class<?>[] {String.class, String.class}, new RemoteParam(),
clientName);
Object result = rpcClient.invokeSequential(
locations, method, Boolean.class, null);
return (boolean) result;
}
@Override
public boolean setReplication(String src, short replication)
throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.WRITE);
List<RemoteLocation> locations = rpcServer.getLocationsForPath(src, true);
RemoteMethod method = new RemoteMethod("setReplication",
new Class<?>[] {String.class, short.class}, new RemoteParam(),
replication);
if (rpcServer.isInvokeConcurrent(src)) {
return !rpcClient.invokeConcurrent(locations, method, Boolean.class)
.containsValue(false);
} else {
return rpcClient.invokeSequential(locations, method, Boolean.class,
Boolean.TRUE);
}
}
@Override
public void setStoragePolicy(String src, String policyName)
throws IOException {
storagePolicy.setStoragePolicy(src, policyName);
}
@Override
public BlockStoragePolicy[] getStoragePolicies() throws IOException {
return storagePolicy.getStoragePolicies();
}
@Override
public void setPermission(String src, FsPermission permissions)
throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.WRITE);
final List<RemoteLocation> locations =
rpcServer.getLocationsForPath(src, false, false);
RemoteMethod method = new RemoteMethod("setPermission",
new Class<?>[] {String.class, FsPermission.class},
new RemoteParam(), permissions);
if (rpcServer.isInvokeConcurrent(src)) {
rpcClient.invokeConcurrent(locations, method);
} else {
rpcClient.invokeSequential(locations, method);
}
}
@Override
public void setOwner(String src, String username, String groupname)
throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.WRITE);
final List<RemoteLocation> locations =
rpcServer.getLocationsForPath(src, false, false);
RemoteMethod method = new RemoteMethod("setOwner",
new Class<?>[] {String.class, String.class, String.class},
new RemoteParam(), username, groupname);
if (rpcServer.isInvokeConcurrent(src)) {
rpcClient.invokeConcurrent(locations, method);
} else {
rpcClient.invokeSequential(locations, method);
}
}
/**
* Excluded and favored nodes are not verified and will be ignored by
* placement policy if they are not in the same nameservice as the file.
*/
@Override
public LocatedBlock addBlock(String src, String clientName,
ExtendedBlock previous, DatanodeInfo[] excludedNodes, long fileId,
String[] favoredNodes, EnumSet<AddBlockFlag> addBlockFlags)
throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.WRITE);
RemoteMethod method = new RemoteMethod("addBlock",
new Class<?>[] {String.class, String.class, ExtendedBlock.class,
DatanodeInfo[].class, long.class, String[].class,
EnumSet.class},
new RemoteParam(), clientName, previous, excludedNodes, fileId,
favoredNodes, addBlockFlags);
if (previous != null) {
return rpcClient.invokeSingle(previous, method, LocatedBlock.class);
}
final List<RemoteLocation> locations =
rpcServer.getLocationsForPath(src, true);
// TODO verify the excludedNodes and favoredNodes are acceptable to this NN
return rpcClient.invokeSequential(
locations, method, LocatedBlock.class, null);
}
/**
* Excluded nodes are not verified and will be ignored by placement if they
* are not in the same nameservice as the file.
*/
@Override
public LocatedBlock getAdditionalDatanode(final String src, final long fileId,
final ExtendedBlock blk, final DatanodeInfo[] existings,
final String[] existingStorageIDs, final DatanodeInfo[] excludes,
final int numAdditionalNodes, final String clientName)
throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.READ);
RemoteMethod method = new RemoteMethod("getAdditionalDatanode",
new Class<?>[] {String.class, long.class, ExtendedBlock.class,
DatanodeInfo[].class, String[].class,
DatanodeInfo[].class, int.class, String.class},
new RemoteParam(), fileId, blk, existings, existingStorageIDs, excludes,
numAdditionalNodes, clientName);
if (blk != null) {
return rpcClient.invokeSingle(blk, method, LocatedBlock.class);
}
final List<RemoteLocation> locations =
rpcServer.getLocationsForPath(src, false);
return rpcClient.invokeSequential(
locations, method, LocatedBlock.class, null);
}
@Override
public void abandonBlock(ExtendedBlock b, long fileId, String src,
String holder) throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.WRITE);
RemoteMethod method = new RemoteMethod("abandonBlock",
new Class<?>[] {ExtendedBlock.class, long.class, String.class,
String.class},
b, fileId, new RemoteParam(), holder);
rpcClient.invokeSingle(b, method);
}
@Override
public boolean complete(String src, String clientName, ExtendedBlock last,
long fileId) throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.WRITE);
RemoteMethod method = new RemoteMethod("complete",
new Class<?>[] {String.class, String.class, ExtendedBlock.class,
long.class},
new RemoteParam(), clientName, last, fileId);
if (last != null) {
return rpcClient.invokeSingle(last, method, Boolean.class);
}
final List<RemoteLocation> locations =
rpcServer.getLocationsForPath(src, true);
// Complete can return true/false, so don't expect a result
return rpcClient.invokeSequential(locations, method, Boolean.class, null);
}
@Override
public LocatedBlock updateBlockForPipeline(
ExtendedBlock block, String clientName) throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.WRITE);
RemoteMethod method = new RemoteMethod("updateBlockForPipeline",
new Class<?>[] {ExtendedBlock.class, String.class},
block, clientName);
return rpcClient.invokeSingle(block, method, LocatedBlock.class);
}
/**
* Datanode are not verified to be in the same nameservice as the old block.
* TODO This may require validation.
*/
@Override
public void updatePipeline(String clientName, ExtendedBlock oldBlock,
ExtendedBlock newBlock, DatanodeID[] newNodes, String[] newStorageIDs)
throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.WRITE);
RemoteMethod method = new RemoteMethod("updatePipeline",
new Class<?>[] {String.class, ExtendedBlock.class, ExtendedBlock.class,
DatanodeID[].class, String[].class},
clientName, oldBlock, newBlock, newNodes, newStorageIDs);
rpcClient.invokeSingle(oldBlock, method);
}
@Override
public long getPreferredBlockSize(String src) throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.READ);
final List<RemoteLocation> locations =
rpcServer.getLocationsForPath(src, true, false);
RemoteMethod method = new RemoteMethod("getPreferredBlockSize",
new Class<?>[] {String.class}, new RemoteParam());
return rpcClient.invokeSequential(locations, method, Long.class, null);
}
@Deprecated
@Override
public boolean rename(final String src, final String dst)
throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.WRITE);
final List<RemoteLocation> srcLocations =
rpcServer.getLocationsForPath(src, true, false);
final List<RemoteLocation> dstLocations =
rpcServer.getLocationsForPath(dst, false, false);
// srcLocations may be trimmed by getRenameDestinations()
final List<RemoteLocation> locs = new LinkedList<>(srcLocations);
RemoteParam dstParam = getRenameDestinations(locs, dstLocations);
if (locs.isEmpty()) {
return rbfRename.routerFedRename(src, dst, srcLocations, dstLocations);
}
RemoteMethod method = new RemoteMethod("rename",
new Class<?>[] {String.class, String.class},
new RemoteParam(), dstParam);
if (isMultiDestDirectory(src)) {
return rpcClient.invokeAll(locs, method);
} else {
return rpcClient.invokeSequential(locs, method, Boolean.class,
Boolean.TRUE);
}
}
@Override
public void rename2(final String src, final String dst,
final Options.Rename... options) throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.WRITE);
final List<RemoteLocation> srcLocations =
rpcServer.getLocationsForPath(src, true, false);
final List<RemoteLocation> dstLocations =
rpcServer.getLocationsForPath(dst, false, false);
// srcLocations may be trimmed by getRenameDestinations()
final List<RemoteLocation> locs = new LinkedList<>(srcLocations);
RemoteParam dstParam = getRenameDestinations(locs, dstLocations);
if (locs.isEmpty()) {
rbfRename.routerFedRename(src, dst, srcLocations, dstLocations);
return;
}
RemoteMethod method = new RemoteMethod("rename2",
new Class<?>[] {String.class, String.class, options.getClass()},
new RemoteParam(), dstParam, options);
if (isMultiDestDirectory(src)) {
rpcClient.invokeConcurrent(locs, method);
} else {
rpcClient.invokeSequential(locs, method, null, null);
}
}
@Override
public void concat(String trg, String[] src) throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.WRITE);
// See if the src and target files are all in the same namespace
LocatedBlocks targetBlocks = getBlockLocations(trg, 0, 1);
if (targetBlocks == null) {
throw new IOException("Cannot locate blocks for target file - " + trg);
}
LocatedBlock lastLocatedBlock = targetBlocks.getLastLocatedBlock();
String targetBlockPoolId = lastLocatedBlock.getBlock().getBlockPoolId();
for (String source : src) {
LocatedBlocks sourceBlocks = getBlockLocations(source, 0, 1);
if (sourceBlocks == null) {
throw new IOException(
"Cannot located blocks for source file " + source);
}
String sourceBlockPoolId =
sourceBlocks.getLastLocatedBlock().getBlock().getBlockPoolId();
if (!sourceBlockPoolId.equals(targetBlockPoolId)) {
throw new IOException("Cannot concatenate source file " + source
+ " because it is located in a different namespace"
+ " with block pool id " + sourceBlockPoolId
+ " from the target file with block pool id "
+ targetBlockPoolId);
}
}
// Find locations in the matching namespace.
final RemoteLocation targetDestination =
rpcServer.getLocationForPath(trg, true, targetBlockPoolId);
String[] sourceDestinations = new String[src.length];
for (int i = 0; i < src.length; i++) {
String sourceFile = src[i];
RemoteLocation location =
rpcServer.getLocationForPath(sourceFile, true, targetBlockPoolId);
sourceDestinations[i] = location.getDest();
}
// Invoke
RemoteMethod method = new RemoteMethod("concat",
new Class<?>[] {String.class, String[].class},
targetDestination.getDest(), sourceDestinations);
rpcClient.invokeSingle(targetDestination, method, Void.class);
}
@Override
public boolean truncate(String src, long newLength, String clientName)
throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.WRITE);
final List<RemoteLocation> locations =
rpcServer.getLocationsForPath(src, true);
RemoteMethod method = new RemoteMethod("truncate",
new Class<?>[] {String.class, long.class, String.class},
new RemoteParam(), newLength, clientName);
return rpcClient.invokeSequential(locations, method, Boolean.class,
Boolean.TRUE);
}
@Override
public boolean delete(String src, boolean recursive) throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.WRITE);
final List<RemoteLocation> locations =
rpcServer.getLocationsForPath(src, true, false);
RemoteMethod method = new RemoteMethod("delete",
new Class<?>[] {String.class, boolean.class}, new RemoteParam(),
recursive);
if (rpcServer.isPathAll(src)) {
return rpcClient.invokeAll(locations, method);
} else {
return rpcClient.invokeSequential(locations, method,
Boolean.class, Boolean.TRUE);
}
}
@Override
public boolean mkdirs(String src, FsPermission masked, boolean createParent)
throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.WRITE);
final List<RemoteLocation> locations =
rpcServer.getLocationsForPath(src, false);
RemoteMethod method = new RemoteMethod("mkdirs",
new Class<?>[] {String.class, FsPermission.class, boolean.class},
new RemoteParam(), masked, createParent);
// Create in all locations
if (rpcServer.isPathAll(src)) {
return rpcClient.invokeAll(locations, method);
}
if (locations.size() > 1) {
// Check if this directory already exists
try {
HdfsFileStatus fileStatus = getFileInfo(src);
if (fileStatus != null) {
// When existing, the NN doesn't return an exception; return true
return true;
}
} catch (IOException ioe) {
// Can't query if this file exists or not.
LOG.error("Error getting file info for {} while proxying mkdirs: {}",
src, ioe.getMessage());
}
}
final RemoteLocation firstLocation = locations.get(0);
try {
return rpcClient.invokeSingle(firstLocation, method, Boolean.class);
} catch (IOException ioe) {
final List<RemoteLocation> newLocations = checkFaultTolerantRetry(
method, src, ioe, firstLocation, locations);
return rpcClient.invokeSequential(
newLocations, method, Boolean.class, Boolean.TRUE);
}
}
private Map<String, FederationNamespaceInfo> getAvailableNamespaces()
throws IOException {
Map<String, FederationNamespaceInfo> allAvailableNamespaces =
new HashMap<>();
namenodeResolver.getNamespaces().forEach(
k -> allAvailableNamespaces.put(k.getNameserviceId(), k));
return allAvailableNamespaces;
}
/**
* Try to get a list of FederationNamespaceInfo for renewLease RPC.
*/
private List<FederationNamespaceInfo> getRenewLeaseNSs(List<String> namespaces)
throws IOException {
if (namespaces == null || namespaces.isEmpty()) {
return new ArrayList<>(namenodeResolver.getNamespaces());
}
List<FederationNamespaceInfo> result = new ArrayList<>();
Map<String, FederationNamespaceInfo> allAvailableNamespaces =
getAvailableNamespaces();
for (String namespace : namespaces) {
if (!allAvailableNamespaces.containsKey(namespace)) {
return new ArrayList<>(namenodeResolver.getNamespaces());
} else {
result.add(allAvailableNamespaces.get(namespace));
}
}
return result;
}
@Override
public void renewLease(String clientName, List<String> namespaces)
throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.WRITE);
RemoteMethod method = new RemoteMethod("renewLease",
new Class<?>[] {String.class, List.class}, clientName, null);
List<FederationNamespaceInfo> nss = getRenewLeaseNSs(namespaces);
if (nss.size() == 1) {
rpcClient.invokeSingle(nss.get(0).getNameserviceId(), method);
} else {
rpcClient.invokeConcurrent(nss, method, false, false);
}
}
@Override
public DirectoryListing getListing(String src, byte[] startAfter,
boolean needLocation) throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.READ);
List<RemoteResult<RemoteLocation, DirectoryListing>> listings =
getListingInt(src, startAfter, needLocation);
TreeMap<String, HdfsFileStatus> nnListing = new TreeMap<>();
int totalRemainingEntries = 0;
int remainingEntries = 0;
boolean namenodeListingExists = false;
// Check the subcluster listing with the smallest name to make sure
// no file is skipped across subclusters
String lastName = null;
if (listings != null) {
for (RemoteResult<RemoteLocation, DirectoryListing> result : listings) {
if (result.hasException()) {
IOException ioe = result.getException();
if (ioe instanceof FileNotFoundException) {
RemoteLocation location = result.getLocation();
LOG.debug("Cannot get listing from {}", location);
} else if (!allowPartialList) {
throw ioe;
}
} else if (result.getResult() != null) {
DirectoryListing listing = result.getResult();
totalRemainingEntries += listing.getRemainingEntries();
HdfsFileStatus[] partialListing = listing.getPartialListing();
int length = partialListing.length;
if (length > 0) {
HdfsFileStatus lastLocalEntry = partialListing[length-1];
String lastLocalName = lastLocalEntry.getLocalName();
if (lastName == null || lastName.compareTo(lastLocalName) > 0) {
lastName = lastLocalName;
}
}
}
}
// Add existing entries
for (RemoteResult<RemoteLocation, DirectoryListing> result : listings) {
DirectoryListing listing = result.getResult();
if (listing != null) {
namenodeListingExists = true;
for (HdfsFileStatus file : listing.getPartialListing()) {
String filename = file.getLocalName();
if (totalRemainingEntries > 0 &&
filename.compareTo(lastName) > 0) {
// Discarding entries further than the lastName
remainingEntries++;
} else {
nnListing.put(filename, file);
}
}
remainingEntries += listing.getRemainingEntries();
}
}
}
// Add mount points at this level in the tree
final List<String> children = subclusterResolver.getMountPoints(src);
// Sort the list as the entries from subcluster are also sorted
if (children != null) {
Collections.sort(children);
}
if (children != null) {
// Get the dates for each mount point
Map<String, Long> dates = getMountPointDates(src);
// Create virtual folder with the mount name
for (String child : children) {
long date = 0;
if (dates != null && dates.containsKey(child)) {
date = dates.get(child);
}
Path childPath = new Path(src, child);
HdfsFileStatus dirStatus =
getMountPointStatus(childPath.toString(), 0, date);
// if there is no subcluster path, always add mount point
if (lastName == null) {
nnListing.put(child, dirStatus);
} else {
if (shouldAddMountPoint(child,
lastName, startAfter, remainingEntries)) {
// This may overwrite existing listing entries with the mount point
// TODO don't add if already there?
nnListing.put(child, dirStatus);
}
}
}
// Update the remaining count to include left mount points
if (nnListing.size() > 0) {
String lastListing = nnListing.lastKey();
for (int i = 0; i < children.size(); i++) {
if (children.get(i).compareTo(lastListing) > 0) {
remainingEntries += (children.size() - i);
break;
}
}
}
}
if (!namenodeListingExists && nnListing.size() == 0) {
// NN returns a null object if the directory cannot be found and has no
// listing. If we didn't retrieve any NN listing data, and there are no
// mount points here, return null.
return null;
}
// Generate combined listing
HdfsFileStatus[] combinedData = new HdfsFileStatus[nnListing.size()];
combinedData = nnListing.values().toArray(combinedData);
return new DirectoryListing(combinedData, remainingEntries);
}
@Override
public BatchedDirectoryListing getBatchedListing(String[] srcs,
byte[] startAfter, boolean needLocation) throws IOException {
throw new UnsupportedOperationException("Not implemented");
}
@Override
public HdfsFileStatus getFileInfo(String src) throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.READ);
HdfsFileStatus ret = null;
IOException noLocationException = null;
try {
final List<RemoteLocation> locations = rpcServer.getLocationsForPath(src, false, false);
RemoteMethod method = new RemoteMethod("getFileInfo",
new Class<?>[] {String.class}, new RemoteParam());
// If it's a directory, we check in all locations
if (rpcServer.isPathAll(src)) {
ret = getFileInfoAll(locations, method);
} else {
// Check for file information sequentially
ret = rpcClient.invokeSequential(locations, method, HdfsFileStatus.class, null);
}
} catch (NoLocationException | RouterResolveException e) {
noLocationException = e;
}
// If there is no real path, check mount points
if (ret == null) {
List<String> children = subclusterResolver.getMountPoints(src);
if (children != null && !children.isEmpty()) {
Map<String, Long> dates = getMountPointDates(src);
long date = 0;
if (dates != null && dates.containsKey(src)) {
date = dates.get(src);
}
ret = getMountPointStatus(src, children.size(), date);
} else if (children != null) {
// The src is a mount point, but there are no files or directories
ret = getMountPointStatus(src, 0, 0);
}
}
// Can't find mount point for path and the path didn't contain any sub monit points,
// throw the NoLocationException to client.
if (ret == null && noLocationException != null) {
throw noLocationException;
}
return ret;
}
@Override
public boolean isFileClosed(String src) throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.READ);
final List<RemoteLocation> locations =
rpcServer.getLocationsForPath(src, false, false);
RemoteMethod method = new RemoteMethod("isFileClosed",
new Class<?>[] {String.class}, new RemoteParam());
return rpcClient.invokeSequential(locations, method, Boolean.class,
null);
}
@Override
public HdfsFileStatus getFileLinkInfo(String src) throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.READ);
final List<RemoteLocation> locations =
rpcServer.getLocationsForPath(src, false, false);
RemoteMethod method = new RemoteMethod("getFileLinkInfo",
new Class<?>[] {String.class}, new RemoteParam());
return rpcClient.invokeSequential(locations, method, HdfsFileStatus.class,
null);
}
@Override
public HdfsLocatedFileStatus getLocatedFileInfo(String src,
boolean needBlockToken) throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.READ);
final List<RemoteLocation> locations =
rpcServer.getLocationsForPath(src, false, false);
RemoteMethod method = new RemoteMethod("getLocatedFileInfo",
new Class<?>[] {String.class, boolean.class}, new RemoteParam(),
needBlockToken);
return (HdfsLocatedFileStatus) rpcClient.invokeSequential(
locations, method, HdfsFileStatus.class, null);
}
@Override
public long[] getStats() throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.UNCHECKED);
RemoteMethod method = new RemoteMethod("getStats");
Set<FederationNamespaceInfo> nss = namenodeResolver.getNamespaces();
Map<FederationNamespaceInfo, long[]> results =
rpcClient.invokeConcurrent(nss, method, true, false, long[].class);
long[] combinedData = new long[STATS_ARRAY_LENGTH];
for (long[] data : results.values()) {
for (int i = 0; i < combinedData.length && i < data.length; i++) {
if (data[i] >= 0) {
combinedData[i] += data[i];
}
}
}
return combinedData;
}
@Override
public DatanodeInfo[] getDatanodeReport(HdfsConstants.DatanodeReportType type)
throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.UNCHECKED);
return rpcServer.getDatanodeReport(type, true, 0);
}
@Override
public DatanodeStorageReport[] getDatanodeStorageReport(
HdfsConstants.DatanodeReportType type) throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.UNCHECKED);
Map<String, DatanodeStorageReport[]> dnSubcluster =
rpcServer.getDatanodeStorageReportMap(type);
return mergeDtanodeStorageReport(dnSubcluster);
}
public DatanodeStorageReport[] getDatanodeStorageReport(
HdfsConstants.DatanodeReportType type, boolean requireResponse, long timeOutMs)
throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.UNCHECKED);
Map<String, DatanodeStorageReport[]> dnSubcluster =
rpcServer.getDatanodeStorageReportMap(type, requireResponse, timeOutMs);
return mergeDtanodeStorageReport(dnSubcluster);
}
private DatanodeStorageReport[] mergeDtanodeStorageReport(
Map<String, DatanodeStorageReport[]> dnSubcluster) {
// Avoid repeating machines in multiple subclusters
Map<String, DatanodeStorageReport> datanodesMap = new LinkedHashMap<>();
for (DatanodeStorageReport[] dns : dnSubcluster.values()) {
for (DatanodeStorageReport dn : dns) {
DatanodeInfo dnInfo = dn.getDatanodeInfo();
String nodeId = dnInfo.getXferAddr();
DatanodeStorageReport oldDn = datanodesMap.get(nodeId);
if (oldDn == null ||
dnInfo.getLastUpdate() > oldDn.getDatanodeInfo().getLastUpdate()) {
datanodesMap.put(nodeId, dn);
} else {
LOG.debug("{} is in multiple subclusters", nodeId);
}
}
}
Collection<DatanodeStorageReport> datanodes = datanodesMap.values();
DatanodeStorageReport[] combinedData =
new DatanodeStorageReport[datanodes.size()];
combinedData = datanodes.toArray(combinedData);
return combinedData;
}
@Override
public boolean setSafeMode(HdfsConstants.SafeModeAction action,
boolean isChecked) throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.WRITE);
// Set safe mode in all the name spaces
RemoteMethod method = new RemoteMethod("setSafeMode",
new Class<?>[] {HdfsConstants.SafeModeAction.class, boolean.class},
action, isChecked);
Set<FederationNamespaceInfo> nss = namenodeResolver.getNamespaces();
Map<FederationNamespaceInfo, Boolean> results =
rpcClient.invokeConcurrent(
nss, method, true, !isChecked, Boolean.class);
// We only report true if all the name space are in safe mode
int numSafemode = 0;
for (boolean safemode : results.values()) {
if (safemode) {
numSafemode++;
}
}
return numSafemode == results.size();
}
@Override
public boolean restoreFailedStorage(String arg) throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.UNCHECKED);
RemoteMethod method = new RemoteMethod("restoreFailedStorage",
new Class<?>[] {String.class}, arg);
final Set<FederationNamespaceInfo> nss = namenodeResolver.getNamespaces();
Map<FederationNamespaceInfo, Boolean> ret =
rpcClient.invokeConcurrent(nss, method, true, false, Boolean.class);
boolean success = true;
for (boolean s : ret.values()) {
if (!s) {
success = false;
break;
}
}
return success;
}
@Override
public boolean saveNamespace(long timeWindow, long txGap) throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.UNCHECKED);
RemoteMethod method = new RemoteMethod("saveNamespace",
new Class<?>[] {long.class, long.class}, timeWindow, txGap);
final Set<FederationNamespaceInfo> nss = namenodeResolver.getNamespaces();
Map<FederationNamespaceInfo, Boolean> ret =
rpcClient.invokeConcurrent(nss, method, true, false, boolean.class);
boolean success = true;
for (boolean s : ret.values()) {
if (!s) {
success = false;
break;
}
}
return success;
}
@Override
public long rollEdits() throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.WRITE);
RemoteMethod method = new RemoteMethod("rollEdits", new Class<?>[] {});
final Set<FederationNamespaceInfo> nss = namenodeResolver.getNamespaces();
Map<FederationNamespaceInfo, Long> ret =
rpcClient.invokeConcurrent(nss, method, true, false, long.class);
// Return the maximum txid
long txid = 0;
for (long t : ret.values()) {
if (t > txid) {
txid = t;
}
}
return txid;
}
@Override
public void refreshNodes() throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.UNCHECKED);
RemoteMethod method = new RemoteMethod("refreshNodes", new Class<?>[] {});
final Set<FederationNamespaceInfo> nss = namenodeResolver.getNamespaces();
rpcClient.invokeConcurrent(nss, method, true, true);
}
@Override
public void finalizeUpgrade() throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.UNCHECKED);
RemoteMethod method = new RemoteMethod("finalizeUpgrade",
new Class<?>[] {});
final Set<FederationNamespaceInfo> nss = namenodeResolver.getNamespaces();
rpcClient.invokeConcurrent(nss, method, true, false);
}
@Override
public boolean upgradeStatus() throws IOException {
String methodName = RouterRpcServer.getMethodName();
throw new UnsupportedOperationException(
"Operation \"" + methodName + "\" is not supported");
}
@Override
public RollingUpgradeInfo rollingUpgrade(HdfsConstants.RollingUpgradeAction action)
throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.READ);
RemoteMethod method = new RemoteMethod("rollingUpgrade",
new Class<?>[] {HdfsConstants.RollingUpgradeAction.class}, action);
final Set<FederationNamespaceInfo> nss = namenodeResolver.getNamespaces();
Map<FederationNamespaceInfo, RollingUpgradeInfo> ret =
rpcClient.invokeConcurrent(
nss, method, true, false, RollingUpgradeInfo.class);
// Return the first rolling upgrade info
RollingUpgradeInfo info = null;
for (RollingUpgradeInfo infoNs : ret.values()) {
if (info == null && infoNs != null) {
info = infoNs;
}
}
return info;
}
@Override
public void metaSave(String filename) throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.UNCHECKED);
RemoteMethod method = new RemoteMethod("metaSave",
new Class<?>[] {String.class}, filename);
final Set<FederationNamespaceInfo> nss = namenodeResolver.getNamespaces();
rpcClient.invokeConcurrent(nss, method, true, false);
}
@Override
public CorruptFileBlocks listCorruptFileBlocks(String path, String cookie)
throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.READ);
final List<RemoteLocation> locations =
rpcServer.getLocationsForPath(path, false, false);
RemoteMethod method = new RemoteMethod("listCorruptFileBlocks",
new Class<?>[] {String.class, String.class},
new RemoteParam(), cookie);
return rpcClient.invokeSequential(
locations, method, CorruptFileBlocks.class, null);
}
@Override
public void setBalancerBandwidth(long bandwidth) throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.UNCHECKED);
RemoteMethod method = new RemoteMethod("setBalancerBandwidth",
new Class<?>[] {long.class}, bandwidth);
final Set<FederationNamespaceInfo> nss = namenodeResolver.getNamespaces();
rpcClient.invokeConcurrent(nss, method, true, false);
}
/**
* Recursively get all the locations for the path.
* For example, there are some mount points:
* /a -> ns0 -> /a
* /a/b -> ns1 -> /a/b
* /a/b/c -> ns2 -> /a/b/c
* When the path is '/a', the result of locations should be
* {ns0 -> [RemoteLocation(/a)], ns1 -> [RemoteLocation(/a/b)], ns2 -> [RemoteLocation(/a/b/c)]}
* @param path the path to get the locations.
* @return a map to store all the locations and key is namespace id.
* @throws IOException
*/
@VisibleForTesting
Map<String, List<RemoteLocation>> getAllLocations(String path) throws IOException {
Map<String, List<RemoteLocation>> locations = new HashMap<>();
try {
List<RemoteLocation> parentLocations = rpcServer.getLocationsForPath(path, false, false);
parentLocations.forEach(
l -> locations.computeIfAbsent(l.getNameserviceId(), k -> new ArrayList<>()).add(l));
} catch (NoLocationException | RouterResolveException e) {
LOG.debug("Cannot find locations for {}.", path);
}
final List<String> children = subclusterResolver.getMountPoints(path);
if (children != null) {
for (String child : children) {
String childPath = new Path(path, child).toUri().getPath();
Map<String, List<RemoteLocation>> childLocations = getAllLocations(childPath);
childLocations.forEach(
(k, v) -> locations.computeIfAbsent(k, l -> new ArrayList<>()).addAll(v));
}
}
return locations;
}
/**
* Get all the locations of the path for {@link this#getContentSummary(String)}.
* For example, there are some mount points:
* /a -> ns0 -> /a
* /a/b -> ns0 -> /a/b
* /a/b/c -> ns1 -> /a/b/c
* When the path is '/a', the result of locations should be
* [RemoteLocation('/a', ns0, '/a'), RemoteLocation('/a/b/c', ns1, '/a/b/c')]
* When the path is '/b', will throw NoLocationException.
* @param path the path to get content summary
* @return one list contains all the remote location
* @throws IOException
*/
@VisibleForTesting
List<RemoteLocation> getLocationsForContentSummary(String path) throws IOException {
// Try to get all the locations of the path.
final Map<String, List<RemoteLocation>> ns2Locations = getAllLocations(path);
if (ns2Locations.isEmpty()) {
throw new NoLocationException(path, subclusterResolver.getClass());
}
final List<RemoteLocation> locations = new ArrayList<>();
// remove the redundancy remoteLocation order by destination.
ns2Locations.forEach((k, v) -> {
List<RemoteLocation> sortedList = v.stream().sorted().collect(Collectors.toList());
int size = sortedList.size();
for (int i = size - 1; i > -1; i--) {
RemoteLocation currentLocation = sortedList.get(i);
if (i == 0) {
locations.add(currentLocation);
} else {
RemoteLocation preLocation = sortedList.get(i - 1);
if (!currentLocation.getDest().startsWith(preLocation.getDest() + Path.SEPARATOR)) {
locations.add(currentLocation);
} else {
LOG.debug("Ignore redundant location {}, because there is an ancestor location {}",
currentLocation, preLocation);
}
}
}
});
return locations;
}
@Override
public ContentSummary getContentSummary(String path) throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.READ);
// Get the summaries from regular files
final Collection<ContentSummary> summaries = new ArrayList<>();
final List<RemoteLocation> locations = getLocationsForContentSummary(path);
final RemoteMethod method = new RemoteMethod("getContentSummary",
new Class<?>[] {String.class}, new RemoteParam());
final List<RemoteResult<RemoteLocation, ContentSummary>> results =
rpcClient.invokeConcurrent(locations, method,
false, -1, ContentSummary.class);
FileNotFoundException notFoundException = null;
for (RemoteResult<RemoteLocation, ContentSummary> result : results) {
if (result.hasException()) {
IOException ioe = result.getException();
if (ioe instanceof FileNotFoundException) {
notFoundException = (FileNotFoundException)ioe;
} else if (!allowPartialList) {
throw ioe;
}
} else if (result.getResult() != null) {
summaries.add(result.getResult());
}
}
// Throw original exception if no original nor mount points
if (summaries.isEmpty() && notFoundException != null) {
throw notFoundException;
}
return aggregateContentSummary(summaries);
}
@Override
public void fsync(String src, long fileId, String clientName,
long lastBlockLength) throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.WRITE);
final List<RemoteLocation> locations =
rpcServer.getLocationsForPath(src, true, false);
RemoteMethod method = new RemoteMethod("fsync",
new Class<?>[] {String.class, long.class, String.class, long.class },
new RemoteParam(), fileId, clientName, lastBlockLength);
rpcClient.invokeSequential(locations, method);
}
@Override
public void setTimes(String src, long mtime, long atime) throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.WRITE);
final List<RemoteLocation> locations =
rpcServer.getLocationsForPath(src, false, false);
RemoteMethod method = new RemoteMethod("setTimes",
new Class<?>[] {String.class, long.class, long.class},
new RemoteParam(), mtime, atime);
rpcClient.invokeSequential(locations, method);
}
@Override
public void createSymlink(String target, String link, FsPermission dirPerms,
boolean createParent) throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.WRITE);
// TODO Verify that the link location is in the same NS as the targets
final List<RemoteLocation> targetLocations =
rpcServer.getLocationsForPath(target, true);
final List<RemoteLocation> linkLocations =
rpcServer.getLocationsForPath(link, true);
RemoteLocation linkLocation = linkLocations.get(0);
RemoteMethod method = new RemoteMethod("createSymlink",
new Class<?>[] {String.class, String.class, FsPermission.class,
boolean.class},
new RemoteParam(), linkLocation.getDest(), dirPerms, createParent);
rpcClient.invokeSequential(targetLocations, method);
}
@Override
public String getLinkTarget(String path) throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.READ);
final List<RemoteLocation> locations =
rpcServer.getLocationsForPath(path, false, false);
RemoteMethod method = new RemoteMethod("getLinkTarget",
new Class<?>[] {String.class}, new RemoteParam());
return rpcClient.invokeSequential(locations, method, String.class, null);
}
@Override
public void allowSnapshot(String snapshotRoot) throws IOException {
snapshotProto.allowSnapshot(snapshotRoot);
}
@Override
public void disallowSnapshot(String snapshot) throws IOException {
snapshotProto.disallowSnapshot(snapshot);
}
@Override
public void renameSnapshot(String snapshotRoot, String snapshotOldName,
String snapshotNewName) throws IOException {
snapshotProto.renameSnapshot(
snapshotRoot, snapshotOldName, snapshotNewName);
}
@Override
public SnapshottableDirectoryStatus[] getSnapshottableDirListing()
throws IOException {
return snapshotProto.getSnapshottableDirListing();
}
@Override
public SnapshotStatus[] getSnapshotListing(String snapshotRoot)
throws IOException {
return snapshotProto.getSnapshotListing(snapshotRoot);
}
@Override
public SnapshotDiffReport getSnapshotDiffReport(String snapshotRoot,
String earlierSnapshotName, String laterSnapshotName) throws IOException {
return snapshotProto.getSnapshotDiffReport(
snapshotRoot, earlierSnapshotName, laterSnapshotName);
}
@Override
public SnapshotDiffReportListing getSnapshotDiffReportListing(
String snapshotRoot, String earlierSnapshotName, String laterSnapshotName,
byte[] startPath, int index) throws IOException {
return snapshotProto.getSnapshotDiffReportListing(
snapshotRoot, earlierSnapshotName, laterSnapshotName, startPath, index);
}
@Override
public long addCacheDirective(CacheDirectiveInfo path,
EnumSet<CacheFlag> flags) throws IOException {
return routerCacheAdmin.addCacheDirective(path, flags);
}
@Override
public void modifyCacheDirective(CacheDirectiveInfo directive,
EnumSet<CacheFlag> flags) throws IOException {
routerCacheAdmin.modifyCacheDirective(directive, flags);
}
@Override
public void removeCacheDirective(long id) throws IOException {
routerCacheAdmin.removeCacheDirective(id);
}
@Override
public BatchedEntries<CacheDirectiveEntry> listCacheDirectives(long prevId,
CacheDirectiveInfo filter) throws IOException {
return routerCacheAdmin.listCacheDirectives(prevId, filter);
}
@Override
public void addCachePool(CachePoolInfo info) throws IOException {
routerCacheAdmin.addCachePool(info);
}
@Override
public void modifyCachePool(CachePoolInfo info) throws IOException {
routerCacheAdmin.modifyCachePool(info);
}
@Override
public void removeCachePool(String cachePoolName) throws IOException {
routerCacheAdmin.removeCachePool(cachePoolName);
}
@Override
public BatchedEntries<CachePoolEntry> listCachePools(String prevKey)
throws IOException {
return routerCacheAdmin.listCachePools(prevKey);
}
@Override
public void modifyAclEntries(String src, List<AclEntry> aclSpec)
throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.WRITE);
// TODO handle virtual directories
final List<RemoteLocation> locations =
rpcServer.getLocationsForPath(src, false, false);
RemoteMethod method = new RemoteMethod("modifyAclEntries",
new Class<?>[] {String.class, List.class},
new RemoteParam(), aclSpec);
if (rpcServer.isInvokeConcurrent(src)) {
rpcClient.invokeConcurrent(locations, method);
} else {
rpcClient.invokeSequential(locations, method);
}
}
@Override
public void removeAclEntries(String src, List<AclEntry> aclSpec)
throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.WRITE);
// TODO handle virtual directories
final List<RemoteLocation> locations =
rpcServer.getLocationsForPath(src, false, false);
RemoteMethod method = new RemoteMethod("removeAclEntries",
new Class<?>[] {String.class, List.class},
new RemoteParam(), aclSpec);
if (rpcServer.isInvokeConcurrent(src)) {
rpcClient.invokeConcurrent(locations, method);
} else {
rpcClient.invokeSequential(locations, method);
}
}
@Override
public void removeDefaultAcl(String src) throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.WRITE);
// TODO handle virtual directories
final List<RemoteLocation> locations =
rpcServer.getLocationsForPath(src, false, false);
RemoteMethod method = new RemoteMethod("removeDefaultAcl",
new Class<?>[] {String.class}, new RemoteParam());
if (rpcServer.isInvokeConcurrent(src)) {
rpcClient.invokeConcurrent(locations, method);
} else {
rpcClient.invokeSequential(locations, method);
}
}
@Override
public void removeAcl(String src) throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.WRITE);
// TODO handle virtual directories
final List<RemoteLocation> locations =
rpcServer.getLocationsForPath(src, false, false);
RemoteMethod method = new RemoteMethod("removeAcl",
new Class<?>[] {String.class}, new RemoteParam());
if (rpcServer.isInvokeConcurrent(src)) {
rpcClient.invokeConcurrent(locations, method);
} else {
rpcClient.invokeSequential(locations, method);
}
}
@Override
public void setAcl(String src, List<AclEntry> aclSpec) throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.WRITE);
// TODO handle virtual directories
final List<RemoteLocation> locations =
rpcServer.getLocationsForPath(src, false, false);
RemoteMethod method = new RemoteMethod(
"setAcl", new Class<?>[] {String.class, List.class},
new RemoteParam(), aclSpec);
if (rpcServer.isInvokeConcurrent(src)) {
rpcClient.invokeConcurrent(locations, method);
} else {
rpcClient.invokeSequential(locations, method);
}
}
@Override
public AclStatus getAclStatus(String src) throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.READ);
// TODO handle virtual directories
final List<RemoteLocation> locations =
rpcServer.getLocationsForPath(src, false, false);
RemoteMethod method = new RemoteMethod("getAclStatus",
new Class<?>[] {String.class}, new RemoteParam());
return rpcClient.invokeSequential(locations, method, AclStatus.class, null);
}
@Override
public void createEncryptionZone(String src, String keyName)
throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.WRITE);
// TODO handle virtual directories
final List<RemoteLocation> locations =
rpcServer.getLocationsForPath(src, false, false);
RemoteMethod method = new RemoteMethod("createEncryptionZone",
new Class<?>[] {String.class, String.class},
new RemoteParam(), keyName);
rpcClient.invokeSequential(locations, method);
}
@Override
public EncryptionZone getEZForPath(String src) throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.READ);
// TODO handle virtual directories
final List<RemoteLocation> locations =
rpcServer.getLocationsForPath(src, false, false);
RemoteMethod method = new RemoteMethod("getEZForPath",
new Class<?>[] {String.class}, new RemoteParam());
return rpcClient.invokeSequential(
locations, method, EncryptionZone.class, null);
}
@Override
public BatchedEntries<EncryptionZone> listEncryptionZones(long prevId)
throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.READ, false);
return null;
}
@Override
public void reencryptEncryptionZone(String zone, HdfsConstants.ReencryptAction action)
throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.WRITE, false);
}
@Override
public BatchedEntries<ZoneReencryptionStatus> listReencryptionStatus(
long prevId) throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.READ, false);
return null;
}
@Override
public void setXAttr(String src, XAttr xAttr, EnumSet<XAttrSetFlag> flag)
throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.WRITE);
// TODO handle virtual directories
final List<RemoteLocation> locations =
rpcServer.getLocationsForPath(src, false, false);
RemoteMethod method = new RemoteMethod("setXAttr",
new Class<?>[] {String.class, XAttr.class, EnumSet.class},
new RemoteParam(), xAttr, flag);
if (rpcServer.isInvokeConcurrent(src)) {
rpcClient.invokeConcurrent(locations, method);
} else {
rpcClient.invokeSequential(locations, method);
}
}
@SuppressWarnings("unchecked")
@Override
public List<XAttr> getXAttrs(String src, List<XAttr> xAttrs)
throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.READ);
// TODO handle virtual directories
final List<RemoteLocation> locations =
rpcServer.getLocationsForPath(src, false, false);
RemoteMethod method = new RemoteMethod("getXAttrs",
new Class<?>[] {String.class, List.class}, new RemoteParam(), xAttrs);
return (List<XAttr>) rpcClient.invokeSequential(
locations, method, List.class, null);
}
@SuppressWarnings("unchecked")
@Override
public List<XAttr> listXAttrs(String src) throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.READ);
// TODO handle virtual directories
final List<RemoteLocation> locations =
rpcServer.getLocationsForPath(src, false, false);
RemoteMethod method = new RemoteMethod("listXAttrs",
new Class<?>[] {String.class}, new RemoteParam());
return (List<XAttr>) rpcClient.invokeSequential(
locations, method, List.class, null);
}
@Override
public void removeXAttr(String src, XAttr xAttr) throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.WRITE);
// TODO handle virtual directories
final List<RemoteLocation> locations =
rpcServer.getLocationsForPath(src, false, false);
RemoteMethod method = new RemoteMethod("removeXAttr",
new Class<?>[] {String.class, XAttr.class}, new RemoteParam(), xAttr);
if (rpcServer.isInvokeConcurrent(src)) {
rpcClient.invokeConcurrent(locations, method);
} else {
rpcClient.invokeSequential(locations, method);
}
}
@Override
public void checkAccess(String path, FsAction mode) throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.READ);
// TODO handle virtual directories
final List<RemoteLocation> locations =
rpcServer.getLocationsForPath(path, false, false);
RemoteMethod method = new RemoteMethod("checkAccess",
new Class<?>[] {String.class, FsAction.class},
new RemoteParam(), mode);
rpcClient.invokeSequential(locations, method);
}
@Override
public long getCurrentEditLogTxid() throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.READ);
RemoteMethod method = new RemoteMethod(
"getCurrentEditLogTxid", new Class<?>[] {});
final Set<FederationNamespaceInfo> nss = namenodeResolver.getNamespaces();
Map<FederationNamespaceInfo, Long> ret =
rpcClient.invokeConcurrent(nss, method, true, false, long.class);
// Return the maximum txid
long txid = 0;
for (long t : ret.values()) {
if (t > txid) {
txid = t;
}
}
return txid;
}
@Override
public EventBatchList getEditsFromTxid(long txid) throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.READ, false);
return null;
}
@Override
public DataEncryptionKey getDataEncryptionKey() throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.READ, false);
return null;
}
@Override
public String createSnapshot(String snapshotRoot, String snapshotName)
throws IOException {
return snapshotProto.createSnapshot(snapshotRoot, snapshotName);
}
@Override
public void deleteSnapshot(String snapshotRoot, String snapshotName)
throws IOException {
snapshotProto.deleteSnapshot(snapshotRoot, snapshotName);
}
@Override
public void setQuota(String path, long namespaceQuota, long storagespaceQuota,
StorageType type) throws IOException {
rpcServer.getQuotaModule()
.setQuota(path, namespaceQuota, storagespaceQuota, type, true);
}
@Override
public QuotaUsage getQuotaUsage(String path) throws IOException {
return rpcServer.getQuotaModule().getQuotaUsage(path);
}
@Override
public void reportBadBlocks(LocatedBlock[] blocks) throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.WRITE);
// Block pool id -> blocks
Map<String, List<LocatedBlock>> blockLocations = new HashMap<>();
for (LocatedBlock block : blocks) {
String bpId = block.getBlock().getBlockPoolId();
List<LocatedBlock> bpBlocks = blockLocations.get(bpId);
if (bpBlocks == null) {
bpBlocks = new LinkedList<>();
blockLocations.put(bpId, bpBlocks);
}
bpBlocks.add(block);
}
// Invoke each block pool
for (Map.Entry<String, List<LocatedBlock>> entry : blockLocations.entrySet()) {
String bpId = entry.getKey();
List<LocatedBlock> bpBlocks = entry.getValue();
LocatedBlock[] bpBlocksArray =
bpBlocks.toArray(new LocatedBlock[bpBlocks.size()]);
RemoteMethod method = new RemoteMethod("reportBadBlocks",
new Class<?>[] {LocatedBlock[].class},
new Object[] {bpBlocksArray});
rpcClient.invokeSingleBlockPool(bpId, method);
}
}
@Override
public void unsetStoragePolicy(String src) throws IOException {
storagePolicy.unsetStoragePolicy(src);
}
@Override
public BlockStoragePolicy getStoragePolicy(String path) throws IOException {
return storagePolicy.getStoragePolicy(path);
}
@Override
public ErasureCodingPolicyInfo[] getErasureCodingPolicies()
throws IOException {
return erasureCoding.getErasureCodingPolicies();
}
@Override
public Map<String, String> getErasureCodingCodecs() throws IOException {
return erasureCoding.getErasureCodingCodecs();
}
@Override
public AddErasureCodingPolicyResponse[] addErasureCodingPolicies(
ErasureCodingPolicy[] policies) throws IOException {
return erasureCoding.addErasureCodingPolicies(policies);
}
@Override
public void removeErasureCodingPolicy(String ecPolicyName)
throws IOException {
erasureCoding.removeErasureCodingPolicy(ecPolicyName);
}
@Override
public void disableErasureCodingPolicy(String ecPolicyName)
throws IOException {
erasureCoding.disableErasureCodingPolicy(ecPolicyName);
}
@Override
public void enableErasureCodingPolicy(String ecPolicyName)
throws IOException {
erasureCoding.enableErasureCodingPolicy(ecPolicyName);
}
@Override
public ErasureCodingPolicy getErasureCodingPolicy(String src)
throws IOException {
return erasureCoding.getErasureCodingPolicy(src);
}
@Override
public void setErasureCodingPolicy(String src, String ecPolicyName)
throws IOException {
erasureCoding.setErasureCodingPolicy(src, ecPolicyName);
}
@Override
public void unsetErasureCodingPolicy(String src) throws IOException {
erasureCoding.unsetErasureCodingPolicy(src);
}
@Override
public ECTopologyVerifierResult getECTopologyResultForPolicies(
String... policyNames) throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.UNCHECKED, true);
return erasureCoding.getECTopologyResultForPolicies(policyNames);
}
@Override
public ECBlockGroupStats getECBlockGroupStats() throws IOException {
return erasureCoding.getECBlockGroupStats();
}
@Override
public ReplicatedBlockStats getReplicatedBlockStats() throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.READ);
RemoteMethod method = new RemoteMethod("getReplicatedBlockStats");
Set<FederationNamespaceInfo> nss = namenodeResolver.getNamespaces();
Map<FederationNamespaceInfo, ReplicatedBlockStats> ret = rpcClient
.invokeConcurrent(nss, method, true, false, ReplicatedBlockStats.class);
return ReplicatedBlockStats.merge(ret.values());
}
@Deprecated
@Override
public BatchedEntries<OpenFileEntry> listOpenFiles(long prevId)
throws IOException {
return listOpenFiles(prevId,
EnumSet.of(OpenFilesIterator.OpenFilesType.ALL_OPEN_FILES),
OpenFilesIterator.FILTER_PATH_DEFAULT);
}
@Override
public BatchedEntries<OpenFileEntry> listOpenFiles(long prevId,
EnumSet<OpenFilesIterator.OpenFilesType> openFilesTypes, String path)
throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.READ, false);
return null;
}
@Override
public void msync() throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.READ, true);
Set<FederationNamespaceInfo> nss = namenodeResolver.getNamespaces();
RemoteMethod method = new RemoteMethod("msync");
rpcClient.invokeConcurrent(nss, method);
}
@Override
public void satisfyStoragePolicy(String path) throws IOException {
storagePolicy.satisfyStoragePolicy(path);
}
@Override
public DatanodeInfo[] getSlowDatanodeReport() throws IOException {
rpcServer.checkOperation(NameNode.OperationCategory.UNCHECKED);
return rpcServer.getSlowDatanodeReport(true, 0);
}
@Override
public HAServiceProtocol.HAServiceState getHAServiceState() {
if (rpcServer.isSafeMode()) {
return HAServiceProtocol.HAServiceState.STANDBY;
}
return HAServiceProtocol.HAServiceState.ACTIVE;
}
/**
* Determines combinations of eligible src/dst locations for a rename. A
* rename cannot change the namespace. Renames are only allowed if there is an
* eligible dst location in the same namespace as the source.
*
* @param srcLocations List of all potential source destinations where the
* path may be located. On return this list is trimmed to include
* only the paths that have corresponding destinations in the same
* namespace.
* @param dstLocations The destination path
* @return A map of all eligible source namespaces and their corresponding
* replacement value.
* @throws IOException If the dst paths could not be determined.
*/
private RemoteParam getRenameDestinations(
final List<RemoteLocation> srcLocations,
final List<RemoteLocation> dstLocations) throws IOException {
final Map<RemoteLocation, String> dstMap = new HashMap<>();
Iterator<RemoteLocation> iterator = srcLocations.iterator();
while (iterator.hasNext()) {
RemoteLocation srcLocation = iterator.next();
RemoteLocation eligibleDst =
getFirstMatchingLocation(srcLocation, dstLocations);
if (eligibleDst != null) {
// Use this dst for this source location
dstMap.put(srcLocation, eligibleDst.getDest());
} else {
// This src destination is not valid, remove from the source list
iterator.remove();
}
}
return new RemoteParam(dstMap);
}
/**
* Get first matching location.
*
* @param location Location we are looking for.
* @param locations List of locations.
* @return The first matchin location in the list.
*/
private RemoteLocation getFirstMatchingLocation(RemoteLocation location,
List<RemoteLocation> locations) {
for (RemoteLocation loc : locations) {
if (loc.getNameserviceId().equals(location.getNameserviceId())) {
// Return first matching location
return loc;
}
}
return null;
}
/**
* Aggregate content summaries for each subcluster.
* If the mount point has multiple destinations
* add the quota set value only once.
*
* @param summaries Collection of individual summaries.
* @return Aggregated content summary.
*/
private ContentSummary aggregateContentSummary(
Collection<ContentSummary> summaries) {
if (summaries.size() == 1) {
return summaries.iterator().next();
}
long length = 0;
long fileCount = 0;
long directoryCount = 0;
long quota = 0;
long spaceConsumed = 0;
long spaceQuota = 0;
long snapshotDirectoryCount = 0;
long snapshotFileCount = 0;
String ecPolicy = "";
for (ContentSummary summary : summaries) {
length += summary.getLength();
fileCount += summary.getFileCount();
directoryCount += summary.getDirectoryCount();
quota = summary.getQuota();
spaceConsumed += summary.getSpaceConsumed();
spaceQuota = summary.getSpaceQuota();
snapshotDirectoryCount += summary.getSnapshotDirectoryCount();
snapshotFileCount += summary.getSnapshotFileCount();
// We return from the first response as we assume that the EC policy
// of each sub-cluster is same.
if (ecPolicy.isEmpty()) {
ecPolicy = summary.getErasureCodingPolicy();
}
}
ContentSummary ret = new ContentSummary.Builder()
.length(length)
.fileCount(fileCount)
.directoryCount(directoryCount)
.quota(quota)
.spaceConsumed(spaceConsumed)
.spaceQuota(spaceQuota)
.erasureCodingPolicy(ecPolicy)
.snapshotDirectoryCount(snapshotDirectoryCount)
.snapshotFileCount(snapshotFileCount)
.build();
return ret;
}
/**
* Get the file info from all the locations.
*
* @param locations Locations to check.
* @param method The file information method to run.
* @return The first file info if it's a file, the directory if it's
* everywhere.
* @throws IOException If all the locations throw an exception.
*/
private HdfsFileStatus getFileInfoAll(final List<RemoteLocation> locations,
final RemoteMethod method) throws IOException {
return getFileInfoAll(locations, method, -1);
}
/**
* Get the file info from all the locations.
*
* @param locations Locations to check.
* @param method The file information method to run.
* @param timeOutMs Time out for the operation in milliseconds.
* @return The first file info if it's a file, the directory if it's
* everywhere.
* @throws IOException If all the locations throw an exception.
*/
private HdfsFileStatus getFileInfoAll(final List<RemoteLocation> locations,
final RemoteMethod method, long timeOutMs) throws IOException {
// Get the file info from everybody
Map<RemoteLocation, HdfsFileStatus> results =
rpcClient.invokeConcurrent(locations, method, false, false, timeOutMs,
HdfsFileStatus.class);
int children = 0;
// We return the first file
HdfsFileStatus dirStatus = null;
for (RemoteLocation loc : locations) {
HdfsFileStatus fileStatus = results.get(loc);
if (fileStatus != null) {
children += fileStatus.getChildrenNum();
if (!fileStatus.isDirectory()) {
return fileStatus;
} else if (dirStatus == null) {
dirStatus = fileStatus;
}
}
}
if (dirStatus != null) {
return updateMountPointStatus(dirStatus, children);
}
return null;
}
/**
* Get the permissions for the parent of a child with given permissions.
* Add implicit u+wx permission for parent. This is based on
* @{FSDirMkdirOp#addImplicitUwx}.
* @param mask The permission mask of the child.
* @return The permission mask of the parent.
*/
private static FsPermission getParentPermission(final FsPermission mask) {
FsPermission ret = new FsPermission(
mask.getUserAction().or(FsAction.WRITE_EXECUTE),
mask.getGroupAction(),
mask.getOtherAction());
return ret;
}
/**
* Create a new file status for a mount point.
*
* @param name Name of the mount point.
* @param childrenNum Number of children.
* @param date Map with the dates.
* @return New HDFS file status representing a mount point.
*/
@VisibleForTesting
HdfsFileStatus getMountPointStatus(
String name, int childrenNum, long date) {
long modTime = date;
long accessTime = date;
FsPermission permission = FsPermission.getDirDefault();
String owner = this.superUser;
String group = this.superGroup;
EnumSet<HdfsFileStatus.Flags> flags =
EnumSet.noneOf(HdfsFileStatus.Flags.class);
if (subclusterResolver instanceof MountTableResolver) {
try {
String mName = name.startsWith("/") ? name : "/" + name;
MountTableResolver mountTable = (MountTableResolver) subclusterResolver;
MountTable entry = mountTable.getMountPoint(mName);
if (entry != null) {
permission = entry.getMode();
owner = entry.getOwnerName();
group = entry.getGroupName();
RemoteMethod method = new RemoteMethod("getFileInfo",
new Class<?>[] {String.class}, new RemoteParam());
HdfsFileStatus fInfo = getFileInfoAll(
entry.getDestinations(), method, mountStatusTimeOut);
if (fInfo != null) {
permission = fInfo.getPermission();
owner = fInfo.getOwner();
group = fInfo.getGroup();
childrenNum = fInfo.getChildrenNum();
flags = DFSUtil
.getFlags(fInfo.isEncrypted(), fInfo.isErasureCoded(),
fInfo.isSnapshotEnabled(), fInfo.hasAcl());
}
}
} catch (IOException e) {
LOG.error("Cannot get mount point: {}", e.getMessage());
}
} else {
try {
UserGroupInformation ugi = RouterRpcServer.getRemoteUser();
owner = ugi.getUserName();
group = ugi.getPrimaryGroupName();
} catch (IOException e) {
String msg = "Cannot get remote user: " + e.getMessage();
if (UserGroupInformation.isSecurityEnabled()) {
LOG.error(msg);
} else {
LOG.debug(msg);
}
}
}
long inodeId = 0;
Path path = new Path(name);
String nameStr = path.getName();
return new HdfsFileStatus.Builder()
.isdir(true)
.mtime(modTime)
.atime(accessTime)
.perm(permission)
.owner(owner)
.group(group)
.symlink(new byte[0])
.path(DFSUtil.string2Bytes(nameStr))
.fileId(inodeId)
.children(childrenNum)
.flags(flags)
.build();
}
/**
* Get the modification dates for mount points.
*
* @param path Name of the path to start checking dates from.
* @return Map with the modification dates for all sub-entries.
*/
private Map<String, Long> getMountPointDates(String path) {
Map<String, Long> ret = new TreeMap<>();
if (subclusterResolver instanceof MountTableResolver) {
try {
final List<String> children = subclusterResolver.getMountPoints(path);
for (String child : children) {
Long modTime = getModifiedTime(ret, path, child);
ret.put(child, modTime);
}
} catch (IOException e) {
LOG.error("Cannot get mount point", e);
}
}
return ret;
}
/**
* Get modified time for child. If the child is present in mount table it
* will return the modified time. If the child is not present but subdirs of
* this child are present then it will return latest modified subdir's time
* as modified time of the requested child.
*
* @param ret contains children and modified times.
* @param path Name of the path to start checking dates from.
* @param child child of the requested path.
* @return modified time.
*/
private long getModifiedTime(Map<String, Long> ret, String path,
String child) {
MountTableResolver mountTable = (MountTableResolver)subclusterResolver;
String srcPath;
if (path.equals(Path.SEPARATOR)) {
srcPath = Path.SEPARATOR + child;
} else {
srcPath = path + Path.SEPARATOR + child;
}
Long modTime = 0L;
try {
// Get mount table entry for the srcPath
MountTable entry = mountTable.getMountPoint(srcPath);
// if srcPath is not in mount table but its subdirs are in mount
// table we will display latest modified subdir date/time.
if (entry == null) {
List<MountTable> entries = mountTable.getMounts(srcPath);
for (MountTable eachEntry : entries) {
// Get the latest date
if (ret.get(child) == null ||
ret.get(child) < eachEntry.getDateModified()) {
modTime = eachEntry.getDateModified();
}
}
} else {
modTime = entry.getDateModified();
}
} catch (IOException e) {
LOG.error("Cannot get mount point", e);
}
return modTime;
}
/**
* Get listing on remote locations.
*/
private List<RemoteResult<RemoteLocation, DirectoryListing>> getListingInt(
String src, byte[] startAfter, boolean needLocation) throws IOException {
try {
List<RemoteLocation> locations =
rpcServer.getLocationsForPath(src, false, false);
// Locate the dir and fetch the listing.
if (locations.isEmpty()) {
return new ArrayList<>();
}
RemoteMethod method = new RemoteMethod("getListing",
new Class<?>[] {String.class, startAfter.getClass(), boolean.class},
new RemoteParam(), startAfter, needLocation);
List<RemoteResult<RemoteLocation, DirectoryListing>> listings = rpcClient
.invokeConcurrent(locations, method, false, -1,
DirectoryListing.class);
return listings;
} catch (NoLocationException | RouterResolveException e) {
LOG.debug("Cannot get locations for {}, {}.", src, e.getMessage());
return new ArrayList<>();
}
}
/**
* Check if we should add the mount point into the total listing.
* This should be done under either of the two cases:
* 1) current mount point is between startAfter and cutoff lastEntry.
* 2) there are no remaining entries from subclusters and this mount
* point is bigger than all files from subclusters
* This is to make sure that the following batch of
* getListing call will use the correct startAfter, which is lastEntry from
* subcluster.
*
* @param mountPoint to be added mount point inside router
* @param lastEntry biggest listing from subcluster
* @param startAfter starting listing from client, used to define listing
* start boundary
* @param remainingEntries how many entries left from subcluster
* @return
*/
private static boolean shouldAddMountPoint(
String mountPoint, String lastEntry, byte[] startAfter,
int remainingEntries) {
if (mountPoint.compareTo(DFSUtil.bytes2String(startAfter)) > 0 &&
mountPoint.compareTo(lastEntry) <= 0) {
return true;
}
if (remainingEntries == 0 && mountPoint.compareTo(lastEntry) >= 0) {
return true;
}
return false;
}
/**
* Checks if the path is a directory and is supposed to be present in all
* subclusters.
* @param src the source path
* @return true if the path is directory and is supposed to be present in all
* subclusters else false in all other scenarios.
* @throws IOException if unable to get the file status.
*/
@VisibleForTesting
boolean isMultiDestDirectory(String src) throws IOException {
try {
if (rpcServer.isPathAll(src)) {
List<RemoteLocation> locations;
locations = rpcServer.getLocationsForPath(src, false, false);
RemoteMethod method = new RemoteMethod("getFileInfo",
new Class<?>[] {String.class}, new RemoteParam());
HdfsFileStatus fileStatus = rpcClient.invokeSequential(locations,
method, HdfsFileStatus.class, null);
if (fileStatus != null) {
return fileStatus.isDirectory();
} else {
LOG.debug("The destination {} doesn't exist.", src);
}
}
} catch (UnresolvedPathException e) {
LOG.debug("The destination {} is a symlink.", src);
}
return false;
}
public int getRouterFederationRenameCount() {
return rbfRename.getRouterFederationRenameCount();
}
}
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