http://git-wip-us.apache.org/repos/asf/hadoop/blob/87700d45/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/RouterRpcServer.java ---------------------------------------------------------------------- diff --git a/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/RouterRpcServer.java b/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/RouterRpcServer.java new file mode 100644 index 0000000..e3a1834 --- /dev/null +++ b/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/RouterRpcServer.java @@ -0,0 +1,2214 @@ +/** + * 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.server.federation.router.RBFConfigKeys.DFS_ROUTER_HANDLER_COUNT_DEFAULT; +import static org.apache.hadoop.hdfs.server.federation.router.RBFConfigKeys.DFS_ROUTER_HANDLER_COUNT_KEY; +import static org.apache.hadoop.hdfs.server.federation.router.RBFConfigKeys.DFS_ROUTER_HANDLER_QUEUE_SIZE_DEFAULT; +import static org.apache.hadoop.hdfs.server.federation.router.RBFConfigKeys.DFS_ROUTER_HANDLER_QUEUE_SIZE_KEY; +import static org.apache.hadoop.hdfs.server.federation.router.RBFConfigKeys.DFS_ROUTER_READER_COUNT_DEFAULT; +import static org.apache.hadoop.hdfs.server.federation.router.RBFConfigKeys.DFS_ROUTER_READER_COUNT_KEY; +import static org.apache.hadoop.hdfs.server.federation.router.RBFConfigKeys.DFS_ROUTER_READER_QUEUE_SIZE_DEFAULT; +import static org.apache.hadoop.hdfs.server.federation.router.RBFConfigKeys.DFS_ROUTER_READER_QUEUE_SIZE_KEY; + +import java.io.FileNotFoundException; +import java.io.IOException; +import java.lang.reflect.Array; +import java.net.InetSocketAddress; +import java.util.Collection; +import java.util.EnumSet; +import java.util.HashMap; +import java.util.Iterator; +import java.util.LinkedHashMap; +import java.util.LinkedHashSet; +import java.util.LinkedList; +import java.util.List; +import java.util.Map; +import java.util.Map.Entry; +import java.util.Set; +import java.util.TreeMap; + +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.CommonConfigurationKeys; +import org.apache.hadoop.fs.ContentSummary; +import org.apache.hadoop.fs.CreateFlag; +import org.apache.hadoop.fs.FileAlreadyExistsException; +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.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.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.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.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.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.OpenFilesIterator.OpenFilesType; +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.ZoneReencryptionStatus; +import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.ClientNamenodeProtocol; +import org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolPB; +import org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB; +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.metrics.FederationRPCMetrics; +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.PathLocation; +import org.apache.hadoop.hdfs.server.federation.resolver.RemoteLocation; +import org.apache.hadoop.hdfs.server.federation.store.records.MountTable; +import org.apache.hadoop.hdfs.server.namenode.LeaseExpiredException; +import org.apache.hadoop.hdfs.server.namenode.NameNode.OperationCategory; +import org.apache.hadoop.hdfs.server.namenode.NotReplicatedYetException; +import org.apache.hadoop.hdfs.server.namenode.SafeModeException; +import org.apache.hadoop.hdfs.server.protocol.DatanodeStorageReport; +import org.apache.hadoop.io.EnumSetWritable; +import org.apache.hadoop.io.Text; +import org.apache.hadoop.ipc.ProtobufRpcEngine; +import org.apache.hadoop.ipc.RPC; +import org.apache.hadoop.ipc.RPC.Server; +import org.apache.hadoop.ipc.RemoteException; +import org.apache.hadoop.ipc.StandbyException; +import org.apache.hadoop.net.NodeBase; +import org.apache.hadoop.security.AccessControlException; +import org.apache.hadoop.security.UserGroupInformation; +import org.apache.hadoop.security.token.Token; +import org.apache.hadoop.service.AbstractService; +import org.apache.hadoop.util.ReflectionUtils; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import com.google.common.annotations.VisibleForTesting; +import com.google.protobuf.BlockingService; + +/** + * This class is responsible for handling all of the RPC calls to the It is + * created, started, and stopped by {@link Router}. It implements the + * {@link ClientProtocol} to mimic a + * {@link org.apache.hadoop.hdfs.server.namenode.NameNode NameNode} and proxies + * the requests to the active + * {@link org.apache.hadoop.hdfs.server.namenode.NameNode NameNode}. + */ +public class RouterRpcServer extends AbstractService implements ClientProtocol { + + private static final Logger LOG = + LoggerFactory.getLogger(RouterRpcServer.class); + + + /** Configuration for the RPC server. */ + private Configuration conf; + + /** Identifier for the super user. */ + private final String superUser; + /** Identifier for the super group. */ + private final String superGroup; + + /** Router using this RPC server. */ + private final Router router; + + /** The RPC server that listens to requests from clients. */ + private final Server rpcServer; + /** The address for this RPC server. */ + private final InetSocketAddress rpcAddress; + + /** RPC clients to connect to the Namenodes. */ + private final RouterRpcClient rpcClient; + + /** Monitor metrics for the RPC calls. */ + private final RouterRpcMonitor rpcMonitor; + + + /** Interface to identify the active NN for a nameservice or blockpool ID. */ + private final ActiveNamenodeResolver namenodeResolver; + + /** Interface to map global name space to HDFS subcluster name spaces. */ + private final FileSubclusterResolver subclusterResolver; + + /** If we are in safe mode, fail requests as if a standby NN. */ + private volatile boolean safeMode; + + /** Category of the operation that a thread is executing. */ + private final ThreadLocal<OperationCategory> opCategory = new ThreadLocal<>(); + + // Modules implementing groups of RPC calls + /** Router Quota calls. */ + private final Quota quotaCall; + /** Erasure coding calls. */ + private final ErasureCoding erasureCoding; + + + /** + * Construct a router RPC server. + * + * @param configuration HDFS Configuration. + * @param nnResolver The NN resolver instance to determine active NNs in HA. + * @param fileResolver File resolver to resolve file paths to subclusters. + * @throws IOException If the RPC server could not be created. + */ + public RouterRpcServer(Configuration configuration, Router router, + ActiveNamenodeResolver nnResolver, FileSubclusterResolver fileResolver) + throws IOException { + super(RouterRpcServer.class.getName()); + + this.conf = configuration; + this.router = router; + this.namenodeResolver = nnResolver; + this.subclusterResolver = fileResolver; + + // User and group for reporting + this.superUser = System.getProperty("user.name"); + this.superGroup = this.conf.get( + DFSConfigKeys.DFS_PERMISSIONS_SUPERUSERGROUP_KEY, + DFSConfigKeys.DFS_PERMISSIONS_SUPERUSERGROUP_DEFAULT); + + // RPC server settings + int handlerCount = this.conf.getInt(DFS_ROUTER_HANDLER_COUNT_KEY, + DFS_ROUTER_HANDLER_COUNT_DEFAULT); + + int readerCount = this.conf.getInt(DFS_ROUTER_READER_COUNT_KEY, + DFS_ROUTER_READER_COUNT_DEFAULT); + + int handlerQueueSize = this.conf.getInt(DFS_ROUTER_HANDLER_QUEUE_SIZE_KEY, + DFS_ROUTER_HANDLER_QUEUE_SIZE_DEFAULT); + + // Override Hadoop Common IPC setting + int readerQueueSize = this.conf.getInt(DFS_ROUTER_READER_QUEUE_SIZE_KEY, + DFS_ROUTER_READER_QUEUE_SIZE_DEFAULT); + this.conf.setInt( + CommonConfigurationKeys.IPC_SERVER_RPC_READ_CONNECTION_QUEUE_SIZE_KEY, + readerQueueSize); + + RPC.setProtocolEngine(this.conf, ClientNamenodeProtocolPB.class, + ProtobufRpcEngine.class); + + ClientNamenodeProtocolServerSideTranslatorPB + clientProtocolServerTranslator = + new ClientNamenodeProtocolServerSideTranslatorPB(this); + BlockingService clientNNPbService = ClientNamenodeProtocol + .newReflectiveBlockingService(clientProtocolServerTranslator); + + InetSocketAddress confRpcAddress = conf.getSocketAddr( + RBFConfigKeys.DFS_ROUTER_RPC_BIND_HOST_KEY, + RBFConfigKeys.DFS_ROUTER_RPC_ADDRESS_KEY, + RBFConfigKeys.DFS_ROUTER_RPC_ADDRESS_DEFAULT, + RBFConfigKeys.DFS_ROUTER_RPC_PORT_DEFAULT); + LOG.info("RPC server binding to {} with {} handlers for Router {}", + confRpcAddress, handlerCount, this.router.getRouterId()); + + this.rpcServer = new RPC.Builder(this.conf) + .setProtocol(ClientNamenodeProtocolPB.class) + .setInstance(clientNNPbService) + .setBindAddress(confRpcAddress.getHostName()) + .setPort(confRpcAddress.getPort()) + .setNumHandlers(handlerCount) + .setnumReaders(readerCount) + .setQueueSizePerHandler(handlerQueueSize) + .setVerbose(false) + .build(); + // We don't want the server to log the full stack trace for some exceptions + this.rpcServer.addTerseExceptions( + RemoteException.class, + StandbyException.class, + SafeModeException.class, + FileNotFoundException.class, + FileAlreadyExistsException.class, + AccessControlException.class, + LeaseExpiredException.class, + NotReplicatedYetException.class, + IOException.class); + + // The RPC-server port can be ephemeral... ensure we have the correct info + InetSocketAddress listenAddress = this.rpcServer.getListenerAddress(); + this.rpcAddress = new InetSocketAddress( + confRpcAddress.getHostName(), listenAddress.getPort()); + + // Create metrics monitor + Class<? extends RouterRpcMonitor> rpcMonitorClass = this.conf.getClass( + RBFConfigKeys.DFS_ROUTER_METRICS_CLASS, + RBFConfigKeys.DFS_ROUTER_METRICS_CLASS_DEFAULT, + RouterRpcMonitor.class); + this.rpcMonitor = ReflectionUtils.newInstance(rpcMonitorClass, conf); + + // Create the client + this.rpcClient = new RouterRpcClient(this.conf, this.router.getRouterId(), + this.namenodeResolver, this.rpcMonitor); + + // Initialize modules + this.quotaCall = new Quota(this.router, this); + this.erasureCoding = new ErasureCoding(this); + } + + @Override + protected void serviceInit(Configuration configuration) throws Exception { + this.conf = configuration; + + if (this.rpcMonitor == null) { + LOG.error("Cannot instantiate Router RPC metrics class"); + } else { + this.rpcMonitor.init(this.conf, this, this.router.getStateStore()); + } + + super.serviceInit(configuration); + } + + @Override + protected void serviceStart() throws Exception { + if (this.rpcServer != null) { + this.rpcServer.start(); + LOG.info("Router RPC up at: {}", this.getRpcAddress()); + } + super.serviceStart(); + } + + @Override + protected void serviceStop() throws Exception { + if (this.rpcServer != null) { + this.rpcServer.stop(); + } + if (rpcMonitor != null) { + this.rpcMonitor.close(); + } + super.serviceStop(); + } + + /** + * Get the RPC client to the Namenode. + * + * @return RPC clients to the Namenodes. + */ + public RouterRpcClient getRPCClient() { + return rpcClient; + } + + /** + * Get the RPC monitor and metrics. + * + * @return RPC monitor and metrics. + */ + public RouterRpcMonitor getRPCMonitor() { + return rpcMonitor; + } + + /** + * Allow access to the client RPC server for testing. + * + * @return The RPC server. + */ + @VisibleForTesting + public Server getServer() { + return rpcServer; + } + + /** + * Get the RPC address of the service. + * + * @return RPC service address. + */ + public InetSocketAddress getRpcAddress() { + return rpcAddress; + } + + /** + * Check if the Router is in safe mode. We should only see READ, WRITE, and + * UNCHECKED. It includes a default handler when we haven't implemented an + * operation. If not supported, it always throws an exception reporting the + * operation. + * + * @param op Category of the operation to check. + * @param supported If the operation is supported or not. If not, it will + * throw an UnsupportedOperationException. + * @throws SafeModeException If the Router is in safe mode and cannot serve + * client requests. + * @throws UnsupportedOperationException If the operation is not supported. + */ + protected void checkOperation(OperationCategory op, boolean supported) + throws RouterSafeModeException, UnsupportedOperationException { + checkOperation(op); + + if (!supported) { + if (rpcMonitor != null) { + rpcMonitor.proxyOpNotImplemented(); + } + String methodName = getMethodName(); + throw new UnsupportedOperationException( + "Operation \"" + methodName + "\" is not supported"); + } + } + + /** + * Check if the Router is in safe mode. We should only see READ, WRITE, and + * UNCHECKED. This function should be called by all ClientProtocol functions. + * + * @param op Category of the operation to check. + * @throws SafeModeException If the Router is in safe mode and cannot serve + * client requests. + */ + protected void checkOperation(OperationCategory op) + throws RouterSafeModeException { + // Log the function we are currently calling. + if (rpcMonitor != null) { + rpcMonitor.startOp(); + } + // Log the function we are currently calling. + if (LOG.isDebugEnabled()) { + String methodName = getMethodName(); + LOG.debug("Proxying operation: {}", methodName); + } + + // Store the category of the operation category for this thread + opCategory.set(op); + + // We allow unchecked and read operations + if (op == OperationCategory.UNCHECKED || op == OperationCategory.READ) { + return; + } + + if (safeMode) { + // Throw standby exception, router is not available + if (rpcMonitor != null) { + rpcMonitor.routerFailureSafemode(); + } + throw new RouterSafeModeException(router.getRouterId(), op); + } + } + + /** + * In safe mode all RPC requests will fail and return a standby exception. + * The client will try another Router, similar to the client retry logic for + * HA. + * + * @param mode True if enabled, False if disabled. + */ + public void setSafeMode(boolean mode) { + this.safeMode = mode; + } + + /** + * Check if the Router is in safe mode and cannot serve RPC calls. + * + * @return If the Router is in safe mode. + */ + public boolean isInSafeMode() { + return this.safeMode; + } + + @Override // ClientProtocol + public Token<DelegationTokenIdentifier> getDelegationToken(Text renewer) + throws IOException { + checkOperation(OperationCategory.WRITE, false); + return null; + } + + /** + * The the delegation token from each name service. + * @param renewer + * @return Name service -> Token. + * @throws IOException + */ + public Map<FederationNamespaceInfo, Token<DelegationTokenIdentifier>> + getDelegationTokens(Text renewer) throws IOException { + checkOperation(OperationCategory.WRITE, false); + return null; + } + + @Override // ClientProtocol + public long renewDelegationToken(Token<DelegationTokenIdentifier> token) + throws IOException { + checkOperation(OperationCategory.WRITE, false); + return 0; + } + + @Override // ClientProtocol + public void cancelDelegationToken(Token<DelegationTokenIdentifier> token) + throws IOException { + checkOperation(OperationCategory.WRITE, false); + } + + @Override // ClientProtocol + public LocatedBlocks getBlockLocations(String src, final long offset, + final long length) throws IOException { + checkOperation(OperationCategory.READ); + + List<RemoteLocation> locations = getLocationsForPath(src, false); + RemoteMethod remoteMethod = new RemoteMethod("getBlockLocations", + new Class<?>[] {String.class, long.class, long.class}, + new RemoteParam(), offset, length); + return (LocatedBlocks) rpcClient.invokeSequential(locations, remoteMethod, + LocatedBlocks.class, null); + } + + @Override // ClientProtocol + public FsServerDefaults getServerDefaults() throws IOException { + checkOperation(OperationCategory.READ); + + RemoteMethod method = new RemoteMethod("getServerDefaults"); + String ns = subclusterResolver.getDefaultNamespace(); + return (FsServerDefaults) rpcClient.invokeSingle(ns, method); + } + + @Override // ClientProtocol + public HdfsFileStatus create(String src, FsPermission masked, + String clientName, EnumSetWritable<CreateFlag> flag, + boolean createParent, short replication, long blockSize, + CryptoProtocolVersion[] supportedVersions, String ecPolicyName) + throws IOException { + checkOperation(OperationCategory.WRITE); + + RemoteLocation createLocation = getCreateLocation(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}, + createLocation.getDest(), masked, clientName, flag, createParent, + replication, blockSize, supportedVersions, ecPolicyName); + return (HdfsFileStatus) rpcClient.invokeSingle(createLocation, method); + } + + /** + * Get the location to create a file. It checks if the file already existed + * in one of the locations. + * + * @param src Path of the file to check. + * @return The remote location for this file. + * @throws IOException If the file has no creation location. + */ + private RemoteLocation getCreateLocation(final String src) + throws IOException { + + final List<RemoteLocation> locations = getLocationsForPath(src, true); + if (locations == null || locations.isEmpty()) { + throw new IOException("Cannot get locations to create " + src); + } + + RemoteLocation createLocation = locations.get(0); + if (locations.size() > 1) { + try { + // Check if this file already exists in other subclusters + LocatedBlocks existingLocation = getBlockLocations(src, 0, 1); + if (existingLocation != null) { + // Forward to the existing location and let the NN handle the error + LocatedBlock existingLocationLastLocatedBlock = + existingLocation.getLastLocatedBlock(); + if (existingLocationLastLocatedBlock == null) { + // The block has no blocks yet, check for the meta data + for (RemoteLocation location : locations) { + RemoteMethod method = new RemoteMethod("getFileInfo", + new Class<?>[] {String.class}, new RemoteParam()); + if (rpcClient.invokeSingle(location, method) != null) { + createLocation = location; + break; + } + } + } else { + ExtendedBlock existingLocationLastBlock = + existingLocationLastLocatedBlock.getBlock(); + String blockPoolId = existingLocationLastBlock.getBlockPoolId(); + createLocation = getLocationForPath(src, true, blockPoolId); + } + } + } catch (FileNotFoundException fne) { + // Ignore if the file is not found + } + } + return createLocation; + } + + // Medium + @Override // ClientProtocol + public LastBlockWithStatus append(String src, final String clientName, + final EnumSetWritable<CreateFlag> flag) throws IOException { + checkOperation(OperationCategory.WRITE); + + List<RemoteLocation> locations = getLocationsForPath(src, true); + RemoteMethod method = new RemoteMethod("append", + new Class<?>[] {String.class, String.class, EnumSetWritable.class}, + new RemoteParam(), clientName, flag); + return (LastBlockWithStatus) rpcClient.invokeSequential( + locations, method, LastBlockWithStatus.class, null); + } + + // Low + @Override // ClientProtocol + public boolean recoverLease(String src, String clientName) + throws IOException { + checkOperation(OperationCategory.WRITE); + + final List<RemoteLocation> locations = getLocationsForPath(src, true); + RemoteMethod method = new RemoteMethod("recoverLease", + new Class<?>[] {String.class, String.class}, new RemoteParam(), + clientName); + Object result = rpcClient.invokeSequential( + locations, method, Boolean.class, Boolean.TRUE); + return (boolean) result; + } + + @Override // ClientProtocol + public boolean setReplication(String src, short replication) + throws IOException { + checkOperation(OperationCategory.WRITE); + + List<RemoteLocation> locations = getLocationsForPath(src, true); + RemoteMethod method = new RemoteMethod("setReplication", + new Class<?>[] {String.class, short.class}, new RemoteParam(), + replication); + Object result = rpcClient.invokeSequential( + locations, method, Boolean.class, Boolean.TRUE); + return (boolean) result; + } + + @Override + public void setStoragePolicy(String src, String policyName) + throws IOException { + checkOperation(OperationCategory.WRITE); + + List<RemoteLocation> locations = getLocationsForPath(src, true); + RemoteMethod method = new RemoteMethod("setStoragePolicy", + new Class<?>[] {String.class, String.class}, + new RemoteParam(), policyName); + rpcClient.invokeSequential(locations, method, null, null); + } + + @Override + public BlockStoragePolicy[] getStoragePolicies() throws IOException { + checkOperation(OperationCategory.READ); + + RemoteMethod method = new RemoteMethod("getStoragePolicies"); + String ns = subclusterResolver.getDefaultNamespace(); + return (BlockStoragePolicy[]) rpcClient.invokeSingle(ns, method); + } + + @Override // ClientProtocol + public void setPermission(String src, FsPermission permissions) + throws IOException { + checkOperation(OperationCategory.WRITE); + + final List<RemoteLocation> locations = getLocationsForPath(src, true); + RemoteMethod method = new RemoteMethod("setPermission", + new Class<?>[] {String.class, FsPermission.class}, + new RemoteParam(), permissions); + rpcClient.invokeSequential(locations, method); + } + + @Override // ClientProtocol + public void setOwner(String src, String username, String groupname) + throws IOException { + checkOperation(OperationCategory.WRITE); + + final List<RemoteLocation> locations = getLocationsForPath(src, true); + RemoteMethod method = new RemoteMethod("setOwner", + new Class<?>[] {String.class, String.class, String.class}, + new RemoteParam(), username, groupname); + 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 // ClientProtocol + public LocatedBlock addBlock(String src, String clientName, + ExtendedBlock previous, DatanodeInfo[] excludedNodes, long fileId, + String[] favoredNodes, EnumSet<AddBlockFlag> addBlockFlags) + throws IOException { + checkOperation(OperationCategory.WRITE); + + final List<RemoteLocation> locations = getLocationsForPath(src, true); + 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); + // TODO verify the excludedNodes and favoredNodes are acceptable to this NN + return (LocatedBlock) 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 // ClientProtocol + 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 { + checkOperation(OperationCategory.READ); + + final List<RemoteLocation> locations = getLocationsForPath(src, false); + 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); + return (LocatedBlock) rpcClient.invokeSequential( + locations, method, LocatedBlock.class, null); + } + + @Override // ClientProtocol + public void abandonBlock(ExtendedBlock b, long fileId, String src, + String holder) throws IOException { + checkOperation(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 // ClientProtocol + public boolean complete(String src, String clientName, ExtendedBlock last, + long fileId) throws IOException { + checkOperation(OperationCategory.WRITE); + + final List<RemoteLocation> locations = getLocationsForPath(src, true); + RemoteMethod method = new RemoteMethod("complete", + new Class<?>[] {String.class, String.class, ExtendedBlock.class, + long.class}, + new RemoteParam(), clientName, last, fileId); + // Complete can return true/false, so don't expect a result + return ((Boolean) rpcClient.invokeSequential( + locations, method, Boolean.class, null)).booleanValue(); + } + + @Override // ClientProtocol + public LocatedBlock updateBlockForPipeline( + ExtendedBlock block, String clientName) throws IOException { + checkOperation(OperationCategory.WRITE); + + RemoteMethod method = new RemoteMethod("updateBlockForPipeline", + new Class<?>[] {ExtendedBlock.class, String.class}, + block, clientName); + return (LocatedBlock) rpcClient.invokeSingle(block, method); + } + + /** + * Datanode are not verified to be in the same nameservice as the old block. + * TODO This may require validation. + */ + @Override // ClientProtocol + public void updatePipeline(String clientName, ExtendedBlock oldBlock, + ExtendedBlock newBlock, DatanodeID[] newNodes, String[] newStorageIDs) + throws IOException { + checkOperation(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 // ClientProtocol + public long getPreferredBlockSize(String src) throws IOException { + checkOperation(OperationCategory.READ); + + final List<RemoteLocation> locations = getLocationsForPath(src, true); + RemoteMethod method = new RemoteMethod("getPreferredBlockSize", + new Class<?>[] {String.class}, new RemoteParam()); + return ((Long) rpcClient.invokeSequential( + locations, method, Long.class, null)).longValue(); + } + + /** + * 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 dst 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 String dst) + throws IOException { + + final List<RemoteLocation> dstLocations = getLocationsForPath(dst, true); + 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; + } + + @Deprecated + @Override // ClientProtocol + public boolean rename(final String src, final String dst) + throws IOException { + checkOperation(OperationCategory.WRITE); + + final List<RemoteLocation> srcLocations = getLocationsForPath(src, true); + // srcLocations may be trimmed by getRenameDestinations() + final List<RemoteLocation> locs = new LinkedList<>(srcLocations); + RemoteParam dstParam = getRenameDestinations(locs, dst); + if (locs.isEmpty()) { + throw new IOException( + "Rename of " + src + " to " + dst + " is not allowed," + + " no eligible destination in the same namespace was found."); + } + RemoteMethod method = new RemoteMethod("rename", + new Class<?>[] {String.class, String.class}, + new RemoteParam(), dstParam); + return ((Boolean) rpcClient.invokeSequential( + locs, method, Boolean.class, Boolean.TRUE)).booleanValue(); + } + + @Override // ClientProtocol + public void rename2(final String src, final String dst, + final Options.Rename... options) throws IOException { + checkOperation(OperationCategory.WRITE); + + final List<RemoteLocation> srcLocations = getLocationsForPath(src, true); + // srcLocations may be trimmed by getRenameDestinations() + final List<RemoteLocation> locs = new LinkedList<>(srcLocations); + RemoteParam dstParam = getRenameDestinations(locs, dst); + if (locs.isEmpty()) { + throw new IOException( + "Rename of " + src + " to " + dst + " is not allowed," + + " no eligible destination in the same namespace was found."); + } + RemoteMethod method = new RemoteMethod("rename2", + new Class<?>[] {String.class, String.class, options.getClass()}, + new RemoteParam(), dstParam, options); + rpcClient.invokeSequential(locs, method, null, null); + } + + @Override // ClientProtocol + public void concat(String trg, String[] src) throws IOException { + checkOperation(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 = + getLocationForPath(trg, true, targetBlockPoolId); + String[] sourceDestinations = new String[src.length]; + for (int i = 0; i < src.length; i++) { + String sourceFile = src[i]; + RemoteLocation location = + 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); + } + + @Override // ClientProtocol + public boolean truncate(String src, long newLength, String clientName) + throws IOException { + checkOperation(OperationCategory.WRITE); + + final List<RemoteLocation> locations = getLocationsForPath(src, true); + RemoteMethod method = new RemoteMethod("truncate", + new Class<?>[] {String.class, long.class, String.class}, + new RemoteParam(), newLength, clientName); + return ((Boolean) rpcClient.invokeSequential(locations, method, + Boolean.class, Boolean.TRUE)).booleanValue(); + } + + @Override // ClientProtocol + public boolean delete(String src, boolean recursive) throws IOException { + checkOperation(OperationCategory.WRITE); + + final List<RemoteLocation> locations = getLocationsForPath(src, true); + RemoteMethod method = new RemoteMethod("delete", + new Class<?>[] {String.class, boolean.class}, new RemoteParam(), + recursive); + return ((Boolean) rpcClient.invokeSequential(locations, method, + Boolean.class, Boolean.TRUE)).booleanValue(); + } + + @Override // ClientProtocol + public boolean mkdirs(String src, FsPermission masked, boolean createParent) + throws IOException { + checkOperation(OperationCategory.WRITE); + + final List<RemoteLocation> locations = getLocationsForPath(src, true); + 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 requesting file info for path {} while proxing mkdirs", + src, ioe); + } + } + + RemoteLocation firstLocation = locations.get(0); + RemoteMethod method = new RemoteMethod("mkdirs", + new Class<?>[] {String.class, FsPermission.class, boolean.class}, + new RemoteParam(), masked, createParent); + return ((Boolean) rpcClient.invokeSingle(firstLocation, method)) + .booleanValue(); + } + + @Override // ClientProtocol + public void renewLease(String clientName) throws IOException { + checkOperation(OperationCategory.WRITE); + + RemoteMethod method = new RemoteMethod("renewLease", + new Class<?>[] {String.class}, clientName); + Set<FederationNamespaceInfo> nss = namenodeResolver.getNamespaces(); + rpcClient.invokeConcurrent(nss, method, false, false); + } + + @Override // ClientProtocol + public DirectoryListing getListing(String src, byte[] startAfter, + boolean needLocation) throws IOException { + checkOperation(OperationCategory.READ); + + // Locate the dir and fetch the listing + final List<RemoteLocation> locations = getLocationsForPath(src, true); + RemoteMethod method = new RemoteMethod("getListing", + new Class<?>[] {String.class, startAfter.getClass(), boolean.class}, + new RemoteParam(), startAfter, needLocation); + Map<RemoteLocation, DirectoryListing> listings = + rpcClient.invokeConcurrent( + locations, method, false, false, DirectoryListing.class); + + Map<String, HdfsFileStatus> nnListing = new TreeMap<>(); + int totalRemainingEntries = 0; + int remainingEntries = 0; + boolean namenodeListingExists = false; + if (listings != null) { + // Check the subcluster listing with the smallest name + String lastName = null; + for (Entry<RemoteLocation, DirectoryListing> entry : + listings.entrySet()) { + RemoteLocation location = entry.getKey(); + DirectoryListing listing = entry.getValue(); + if (listing == null) { + LOG.debug("Cannot get listing from {}", location); + } else { + 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 (Object value : listings.values()) { + DirectoryListing listing = (DirectoryListing) value; + 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); + 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); + } + // TODO add number of children + HdfsFileStatus dirStatus = getMountPointStatus(child, 0, date); + + // This may overwrite existing listing entries with the mount point + // TODO don't add if already there? + nnListing.put(child, dirStatus); + } + } + + 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 // ClientProtocol + public HdfsFileStatus getFileInfo(String src) throws IOException { + checkOperation(OperationCategory.READ); + + final List<RemoteLocation> locations = getLocationsForPath(src, false); + RemoteMethod method = new RemoteMethod("getFileInfo", + new Class<?>[] {String.class}, new RemoteParam()); + HdfsFileStatus ret = (HdfsFileStatus) rpcClient.invokeSequential( + locations, method, HdfsFileStatus.class, null); + + // 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); + } + } + + return ret; + } + + @Override // ClientProtocol + public boolean isFileClosed(String src) throws IOException { + checkOperation(OperationCategory.READ); + + final List<RemoteLocation> locations = getLocationsForPath(src, false); + RemoteMethod method = new RemoteMethod("isFileClosed", + new Class<?>[] {String.class}, new RemoteParam()); + return ((Boolean) rpcClient.invokeSequential( + locations, method, Boolean.class, Boolean.TRUE)).booleanValue(); + } + + @Override // ClientProtocol + public HdfsFileStatus getFileLinkInfo(String src) throws IOException { + checkOperation(OperationCategory.READ); + + final List<RemoteLocation> locations = getLocationsForPath(src, false); + RemoteMethod method = new RemoteMethod("getFileLinkInfo", + new Class<?>[] {String.class}, new RemoteParam()); + return (HdfsFileStatus) rpcClient.invokeSequential( + locations, method, HdfsFileStatus.class, null); + } + + @Override + public HdfsLocatedFileStatus getLocatedFileInfo(String src, + boolean needBlockToken) throws IOException { + checkOperation(OperationCategory.READ); + final List<RemoteLocation> locations = getLocationsForPath(src, false); + RemoteMethod method = new RemoteMethod("getLocatedFileInfo", + new Class<?>[] {String.class, boolean.class}, new RemoteParam(), + Boolean.valueOf(needBlockToken)); + return (HdfsLocatedFileStatus) rpcClient.invokeSequential( + locations, method, HdfsFileStatus.class, null); + } + + @Override // ClientProtocol + public long[] getStats() throws IOException { + checkOperation(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 // ClientProtocol + public DatanodeInfo[] getDatanodeReport(DatanodeReportType type) + throws IOException { + checkOperation(OperationCategory.UNCHECKED); + return getDatanodeReport(type, 0); + } + + /** + * Get the datanode report with a timeout. + * @param type Type of the datanode. + * @param timeOutMs Time out for the reply in milliseconds. + * @return List of datanodes. + * @throws IOException If it cannot get the report. + */ + public DatanodeInfo[] getDatanodeReport( + DatanodeReportType type, long timeOutMs) throws IOException { + checkOperation(OperationCategory.UNCHECKED); + + Map<String, DatanodeInfo> datanodesMap = new LinkedHashMap<>(); + RemoteMethod method = new RemoteMethod("getDatanodeReport", + new Class<?>[] {DatanodeReportType.class}, type); + + Set<FederationNamespaceInfo> nss = namenodeResolver.getNamespaces(); + Map<FederationNamespaceInfo, DatanodeInfo[]> results = + rpcClient.invokeConcurrent( + nss, method, true, false, timeOutMs, DatanodeInfo[].class); + for (Entry<FederationNamespaceInfo, DatanodeInfo[]> entry : + results.entrySet()) { + FederationNamespaceInfo ns = entry.getKey(); + DatanodeInfo[] result = entry.getValue(); + for (DatanodeInfo node : result) { + String nodeId = node.getXferAddr(); + if (!datanodesMap.containsKey(nodeId)) { + // Add the subcluster as a suffix to the network location + node.setNetworkLocation( + NodeBase.PATH_SEPARATOR_STR + ns.getNameserviceId() + + node.getNetworkLocation()); + datanodesMap.put(nodeId, node); + } else { + LOG.debug("{} is in multiple subclusters", nodeId); + } + } + } + // Map -> Array + Collection<DatanodeInfo> datanodes = datanodesMap.values(); + DatanodeInfo[] combinedData = new DatanodeInfo[datanodes.size()]; + combinedData = datanodes.toArray(combinedData); + return combinedData; + } + + @Override // ClientProtocol + public DatanodeStorageReport[] getDatanodeStorageReport( + DatanodeReportType type) throws IOException { + checkOperation(OperationCategory.UNCHECKED); + + Map<String, DatanodeStorageReport[]> dnSubcluster = + getDatanodeStorageReportMap(type); + + // 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(); + if (!datanodesMap.containsKey(nodeId)) { + datanodesMap.put(nodeId, dn); + } + // TODO merge somehow, right now it just takes the first one + } + } + + Collection<DatanodeStorageReport> datanodes = datanodesMap.values(); + DatanodeStorageReport[] combinedData = + new DatanodeStorageReport[datanodes.size()]; + combinedData = datanodes.toArray(combinedData); + return combinedData; + } + + /** + * Get the list of datanodes per subcluster. + * + * @param type Type of the datanodes to get. + * @return nsId -> datanode list. + * @throws IOException + */ + public Map<String, DatanodeStorageReport[]> getDatanodeStorageReportMap( + DatanodeReportType type) throws IOException { + + Map<String, DatanodeStorageReport[]> ret = new LinkedHashMap<>(); + RemoteMethod method = new RemoteMethod("getDatanodeStorageReport", + new Class<?>[] {DatanodeReportType.class}, type); + Set<FederationNamespaceInfo> nss = namenodeResolver.getNamespaces(); + Map<FederationNamespaceInfo, DatanodeStorageReport[]> results = + rpcClient.invokeConcurrent( + nss, method, true, false, DatanodeStorageReport[].class); + for (Entry<FederationNamespaceInfo, DatanodeStorageReport[]> entry : + results.entrySet()) { + FederationNamespaceInfo ns = entry.getKey(); + String nsId = ns.getNameserviceId(); + DatanodeStorageReport[] result = entry.getValue(); + ret.put(nsId, result); + } + return ret; + } + + @Override // ClientProtocol + public boolean setSafeMode(SafeModeAction action, boolean isChecked) + throws IOException { + checkOperation(OperationCategory.WRITE); + + // Set safe mode in all the name spaces + RemoteMethod method = new RemoteMethod("setSafeMode", + new Class<?>[] {SafeModeAction.class, boolean.class}, + action, isChecked); + Set<FederationNamespaceInfo> nss = namenodeResolver.getNamespaces(); + Map<FederationNamespaceInfo, Boolean> results = + rpcClient.invokeConcurrent(nss, method, true, true, 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 // ClientProtocol + public boolean restoreFailedStorage(String arg) throws IOException { + checkOperation(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 // ClientProtocol + public boolean saveNamespace(long timeWindow, long txGap) throws IOException { + checkOperation(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 // ClientProtocol + public long rollEdits() throws IOException { + checkOperation(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 // ClientProtocol + public void refreshNodes() throws IOException { + checkOperation(OperationCategory.UNCHECKED); + + RemoteMethod method = new RemoteMethod("refreshNodes", new Class<?>[] {}); + final Set<FederationNamespaceInfo> nss = namenodeResolver.getNamespaces(); + rpcClient.invokeConcurrent(nss, method, true, true); + } + + @Override // ClientProtocol + public void finalizeUpgrade() throws IOException { + checkOperation(OperationCategory.UNCHECKED); + + RemoteMethod method = new RemoteMethod("finalizeUpgrade", + new Class<?>[] {}); + final Set<FederationNamespaceInfo> nss = namenodeResolver.getNamespaces(); + rpcClient.invokeConcurrent(nss, method, true, false); + } + + @Override // ClientProtocol + public RollingUpgradeInfo rollingUpgrade(RollingUpgradeAction action) + throws IOException { + checkOperation(OperationCategory.READ); + + RemoteMethod method = new RemoteMethod("rollingUpgrade", + new Class<?>[] {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 // ClientProtocol + public void metaSave(String filename) throws IOException { + checkOperation(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 // ClientProtocol + public CorruptFileBlocks listCorruptFileBlocks(String path, String cookie) + throws IOException { + checkOperation(OperationCategory.READ); + + final List<RemoteLocation> locations = getLocationsForPath(path, false); + RemoteMethod method = new RemoteMethod("listCorruptFileBlocks", + new Class<?>[] {String.class, String.class}, + new RemoteParam(), cookie); + return (CorruptFileBlocks) rpcClient.invokeSequential( + locations, method, CorruptFileBlocks.class, null); + } + + @Override // ClientProtocol + public void setBalancerBandwidth(long bandwidth) throws IOException { + checkOperation(OperationCategory.UNCHECKED); + + RemoteMethod method = new RemoteMethod("setBalancerBandwidth", + new Class<?>[] {Long.class}, bandwidth); + final Set<FederationNamespaceInfo> nss = namenodeResolver.getNamespaces(); + rpcClient.invokeConcurrent(nss, method, true, false); + } + + @Override // ClientProtocol + public ContentSummary getContentSummary(String path) throws IOException { + checkOperation(OperationCategory.READ); + + // Get the summaries from regular files + Collection<ContentSummary> summaries = new LinkedList<>(); + FileNotFoundException notFoundException = null; + try { + final List<RemoteLocation> locations = getLocationsForPath(path, false); + RemoteMethod method = new RemoteMethod("getContentSummary", + new Class<?>[] {String.class}, new RemoteParam()); + Map<RemoteLocation, ContentSummary> results = + rpcClient.invokeConcurrent( + locations, method, false, false, ContentSummary.class); + summaries.addAll(results.values()); + } catch (FileNotFoundException e) { + notFoundException = e; + } + + // Add mount points at this level in the tree + final List<String> children = subclusterResolver.getMountPoints(path); + if (children != null) { + for (String child : children) { + Path childPath = new Path(path, child); + try { + ContentSummary mountSummary = getContentSummary(childPath.toString()); + if (mountSummary != null) { + summaries.add(mountSummary); + } + } catch (Exception e) { + LOG.error("Cannot get content summary for mount {}: {}", + childPath, e.getMessage()); + } + } + } + + // Throw original exception if no original nor mount points + if (summaries.isEmpty() && notFoundException != null) { + throw notFoundException; + } + + return aggregateContentSummary(summaries); + } + + /** + * Aggregate content summaries for each subcluster. + * + * @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; + + for (ContentSummary summary : summaries) { + length += summary.getLength(); + fileCount += summary.getFileCount(); + directoryCount += summary.getDirectoryCount(); + quota += summary.getQuota(); + spaceConsumed += summary.getSpaceConsumed(); + spaceQuota += summary.getSpaceQuota(); + } + + ContentSummary ret = new ContentSummary.Builder() + .length(length) + .fileCount(fileCount) + .directoryCount(directoryCount) + .quota(quota) + .spaceConsumed(spaceConsumed) + .spaceQuota(spaceQuota) + .build(); + return ret; + } + + @Override // ClientProtocol + public void fsync(String src, long fileId, String clientName, + long lastBlockLength) throws IOException { + checkOperation(OperationCategory.WRITE); + + final List<RemoteLocation> locations = getLocationsForPath(src, true); + 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 // ClientProtocol + public void setTimes(String src, long mtime, long atime) throws IOException { + checkOperation(OperationCategory.WRITE); + + final List<RemoteLocation> locations = getLocationsForPath(src, true); + RemoteMethod method = new RemoteMethod("setTimes", + new Class<?>[] {String.class, long.class, long.class}, + new RemoteParam(), mtime, atime); + rpcClient.invokeSequential(locations, method); + } + + @Override // ClientProtocol + public void createSymlink(String target, String link, FsPermission dirPerms, + boolean createParent) throws IOException { + checkOperation(OperationCategory.WRITE); + + // TODO Verify that the link location is in the same NS as the targets + final List<RemoteLocation> targetLocations = + getLocationsForPath(target, true); + final List<RemoteLocation> linkLocations = + 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 // ClientProtocol + public String getLinkTarget(String path) throws IOException { + checkOperation(OperationCategory.READ); + + final List<RemoteLocation> locations = getLocationsForPath(path, true); + RemoteMethod method = new RemoteMethod("getLinkTarget", + new Class<?>[] {String.class}, new RemoteParam()); + return (String) rpcClient.invokeSequential( + locations, method, String.class, null); + } + + @Override // Client Protocol + public void allowSnapshot(String snapshotRoot) throws IOException { + checkOperation(OperationCategory.WRITE, false); + } + + @Override // Client Protocol + public void disallowSnapshot(String snapshot) throws IOException { + checkOperation(OperationCategory.WRITE, false); + } + + @Override // ClientProtocol + public void renameSnapshot(String snapshotRoot, String snapshotOldName, + String snapshotNewName) throws IOException { + checkOperation(OperationCategory.WRITE, false); + } + + @Override // Client Protocol + public SnapshottableDirectoryStatus[] getSnapshottableDirListing() + throws IOException { + checkOperation(OperationCategory.READ, false); + return null; + } + + @Override // ClientProtocol + public SnapshotDiffReport getSnapshotDiffReport(String snapshotRoot, + String earlierSnapshotName, String laterSnapshotName) throws IOException { + checkOperation(OperationCategory.READ, false); + return null; + } + + @Override // ClientProtocol + public SnapshotDiffReportListing getSnapshotDiffReportListing( + String snapshotRoot, String earlierSnapshotName, String laterSnapshotName, + byte[] startPath, int index) throws IOException { + checkOperation(OperationCategory.READ, false); + return null; + } + + @Override // ClientProtocol + public long addCacheDirective(CacheDirectiveInfo path, + EnumSet<CacheFlag> flags) throws IOException { + checkOperation(OperationCategory.WRITE, false); + return 0; + } + + @Override // ClientProtocol + public void modifyCacheDirective(CacheDirectiveInfo directive, + EnumSet<CacheFlag> flags) throws IOException { + checkOperation(OperationCategory.WRITE, false); + } + + @Override // ClientProtocol + public void removeCacheDirective(long id) throws IOException { + checkOperation(OperationCategory.WRITE, false); + } + + @Override // ClientProtocol + public BatchedEntries<CacheDirectiveEntry> listCacheDirectives( + long prevId, CacheDirectiveInfo filter) throws IOException { + checkOperation(OperationCategory.READ, false); + return null; + } + + @Override // ClientProtocol + public void addCachePool(CachePoolInfo info) throws IOException { + checkOperation(OperationCategory.WRITE, false); + } + + @Override // ClientProtocol + public void modifyCachePool(CachePoolInfo info) throws IOException { + checkOperation(OperationCategory.WRITE, false); + } + + @Override // ClientProtocol + public void removeCachePool(String cachePoolName) throws IOException { + checkOperation(OperationCategory.WRITE, false); + } + + @Override // ClientProtocol + public BatchedEntries<CachePoolEntry> listCachePools(String prevKey) + throws IOException { + checkOperation(OperationCategory.READ, false); + return null; + } + + @Override // ClientProtocol + public void modifyAclEntries(String src, List<AclEntry> aclSpec) + throws IOException { + checkOperation(OperationCategory.WRITE); + + // TODO handle virtual directories + final List<RemoteLocation> locations = getLocationsForPath(src, true); + RemoteMethod method = new RemoteMethod("modifyAclEntries", + new Class<?>[] {String.class, List.class}, + new RemoteParam(), aclSpec); + rpcClient.invokeSequential(locations, method, null, null); + } + + @Override // ClienProtocol + public void removeAclEntries(String src, List<AclEntry> aclSpec) + throws IOException { + checkOperation(OperationCategory.WRITE); + + // TODO handle virtual directories + final List<RemoteLocation> locations = getLocationsForPath(src, true); + RemoteMethod method = new RemoteMethod("removeAclEntries", + new Class<?>[] {String.class, List.class}, + new RemoteParam(), aclSpec); + rpcClient.invokeSequential(locations, method, null, null); + } + + @Override // ClientProtocol + public void removeDefaultAcl(String src) throws IOException { + checkOperation(OperationCategory.WRITE); + + // TODO handle virtual directories + final List<RemoteLocation> locations = getLocationsForPath(src, true); + RemoteMethod method = new RemoteMethod("removeDefaultAcl", + new Class<?>[] {String.class}, new RemoteParam()); + rpcClient.invokeSequential(locations, method); + } + + @Override // ClientProtocol + public void removeAcl(String src) throws IOException { + checkOperation(OperationCategory.WRITE); + + // TODO handle virtual directories + final List<RemoteLocation> locations = getLocationsForPath(src, true); + RemoteMethod method = new RemoteMethod("removeAcl", + new Class<?>[] {String.class}, new RemoteParam()); + rpcClient.invokeSequential(locations, method); + } + + @Override // ClientProtocol + public void setAcl(String src, List<AclEntry> aclSpec) throws IOException { + checkOperation(OperationCategory.WRITE); + + // TODO handle virtual directories + final List<RemoteLocation> locations = getLocationsForPath(src, true); + RemoteMethod method = new RemoteMethod( + "setAcl", new Class<?>[] {String.class, List.class}, + new RemoteParam(), aclSpec); + rpcClient.invokeSequential(locations, method); + } + + @Override // ClientProtocol + public AclStatus getAclStatus(String src) throws IOException { + checkOperation(OperationCategory.READ); + + // TODO handle virtual directories + final List<RemoteLocation> locations = getLocationsForPath(src, false); + RemoteMethod method = new RemoteMethod("getAclStatus", + new Class<?>[] {String.class}, new RemoteParam()); + return (AclStatus) rpcClient.invokeSequential( + locations, method, AclStatus.class, null); + } + + @Override // ClientProtocol + public void createEncryptionZone(String src, String keyName) + throws IOException { + checkOperation(OperationCategory.WRITE); + + // TODO handle virtual directories + final List<RemoteLocation> locations = getLocationsForPath(src, true); + RemoteMethod method = new RemoteMethod("createEncryptionZone", + new Class<?>[] {String.class, String.class}, + new RemoteParam(), keyName); + rpcClient.invokeSequential(locations, method); + } + + @Override // ClientProtocol + public EncryptionZone getEZForPath(String src) throws IOException { + checkOperation(OperationCategory.READ); + + // TODO handle virtual directories + final List<RemoteLocation> locations = getLocationsForPath(src, false); + RemoteMethod method = new RemoteMethod("getEZForPath", + new Class<?>[] {String.class}, new RemoteParam()); + return (EncryptionZone) rpcClient.invokeSequential( + locations, method, EncryptionZone.class, null); + } + + @Override // ClientProtocol + public BatchedEntries<EncryptionZone> listEncryptionZones(long prevId) + throws IOException { + checkOperation(OperationCategory.READ, false); + return null; + } + + @Override // ClientProtocol + public void reencryptEncryptionZone(String zone, ReencryptAction action) + throws IOException { + checkOperation(OperationCategory.WRITE, false); + } + + @Override // ClientProtocol + public BatchedEntries<ZoneReencryptionStatus> listReencryptionStatus( + long prevId) throws IOException { + checkOperation(OperationCategory.READ, false); + return null; + } + + @Override // ClientProtocol + public void setXAttr(String src, XAttr xAttr, EnumSet<XAttrSetFlag> flag) + throws IOException { + checkOperation(OperationCategory.WRITE); + + // TODO handle virtual directories + final List<RemoteLocation> locations = getLocationsForPath(src, true); + RemoteMethod method = new RemoteMethod("setXAttr", + new Class<?>[] {String.class, XAttr.class, EnumSet.class}, + new RemoteParam(), xAttr, flag); + rpcClient.invokeSequential(locations, method); + } + + @SuppressWarnings("unchecked") + @Override // ClientProtocol + public List<XAttr> getXAttrs(String src, List<XAttr> xAttrs) + throws IOException { + checkOperation(OperationCategory.READ); + + // TODO handle virtual directories + final List<RemoteLocation> locations = getLocationsForPath(src, 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 // ClientProtocol + public List<XAttr> listXAttrs(String src) throws IOException { + checkOperation(OperationCategory.READ); + + // TODO handle virtual directories + final List<RemoteLocation> locations = getLocationsForPath(src, false); + RemoteMethod method = new RemoteMethod("listXAttrs", + new Class<?>[] {String.class}, new RemoteParam()); + return (List<XAttr>) rpcClient.invokeSequential( + locations, method, List.class, null); + } + + @Override // ClientProtocol + public void removeXAttr(String src, XAttr xAttr) throws IOException { + checkOperation(OperationCategory.WRITE); + + // TODO handle virtual directories + final List<RemoteLocation> locations = getLocationsForPath(src, true); + RemoteMethod method = new RemoteMethod("removeXAttr", + new Class<?>[] {String.class, XAttr.class}, new RemoteParam(), xAttr); + rpcClient.invokeSequential(locations, method); + } + + @Override // ClientProtocol + public void checkAccess(String path, FsAction mode) throws IOException { + checkOperation(OperationCategory.READ); + + // TODO handle virtual directories + final List<RemoteLocation> locations = getLocationsForPath(path, true); + RemoteMethod method = new RemoteMethod("checkAccess", + new Class<?>[] {String.class, FsAction.class}, + new RemoteParam(), mode); + rpcClient.invokeSequential(locations, method); + } + + @Override // ClientProtocol + public long getCurrentEditLogTxid() throws IOException { + checkOperation(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 // ClientProtocol + public EventBatchList getEditsFromTxid(long txid) throws IOException { + checkOperation(OperationCategory.READ, false); + return null; + } + + @Override + public DataEncryptionKey getDataEncryptionKey() throws IOException { + checkOperation(OperationCategory.READ, false); + return null; + } + + @Override + public String createSnapshot(String snapshotRoot, String snapshotName) + throws IOException { + checkOperation(OperationCategory.WRITE); + return null; + } + + @Override + public void deleteSnapshot(String snapshotRoot, String snapshotName) + throws IOException { + checkOperation(OperationCategory.WRITE, false); + } + + @Override // ClientProtocol + public void setQuota(String path, long namespaceQuota, long storagespaceQuota, + StorageType type) throws IOException { + this.quotaCall.setQuota(path, namespaceQuota, storagespaceQuota, type); + } + + @Override // ClientProtocol + public QuotaUsage getQuotaUsage(String path) throws IOException { + checkOperation(OperationCategory.READ); + return this.quotaCall.getQuotaUsage(path); + } + + @Override + public void reportBadBlocks(LocatedBlock[] blocks) throws IOException { + checkOperation(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 (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 { + checkOperation(OperationCategory.WRITE, false); + } + + @Override + public BlockStoragePolicy getStoragePolicy(String path) throws IOException { + checkOperation(OperationCategory.READ, false); + return null; + } + + @Override // ClientProtocol + public ErasureCodingPolicyInfo[] getErasureCodingPolicies() + throws IOException { + return erasureCoding.getErasureCodingPolicies(); + } + + @Override // ClientProtocol + public Map<String, String> getErasureCodingCodecs() throws IOException { + return erasureCoding.getErasureCodingCodecs(); + } + + @Override // ClientProtocol + public AddErasureCodingPolicyResponse[] addErasureCodingPolicies( + ErasureCodingPolicy[] policies) throws IOException { + return erasureCoding.addErasureCodingPolicies(policies); + } + + @Override // ClientProtocol + public void removeErasureCodingPolicy(String ecPolicyName) + throws IOException { + erasureCoding.removeErasureCodingPolicy(ecPolicyName); + } + + @Override // ClientProtocol + public void disableErasureCodingPolicy(String ecPolicyName) + throws IOException { + erasureCoding.disableErasureCodingPolicy(ecPolicyName); + } + + @Override // ClientProtocol + public void enableErasureCodingPolicy(String ecPolicyName) + throws IOException { + erasureCoding.enableErasureCodingPolicy(ecPolicyName); + } + + @Override // ClientProtocol + public ErasureCodingPolicy getErasureCodingPolicy(String src) + throws IOException { + return erasureCoding.getErasureCodingPolicy(src); + } + + @Override // ClientProtocol + public void setErasureCodingPolicy(String src, String ecPolicyName) + throws IOException { + erasureCoding.setErasureCodingPolicy(src, ecPolicyName); + } + + @Override // ClientProtocol + public void unsetErasureCodingPolicy(String src) throws IOException { + erasureCoding.unsetErasureCodingPolicy(src); + } + + @Override + public ECBlockGroupStats getECBlockGroupStats() throws IOException { + return erasureCoding.getECBlockGroupStats(); + } + + @Override + public ReplicatedBlockStats getReplicatedBlockStats() throws IOException { + checkOperation(OperationCategory.READ, false); + return null; + } + + @Deprecated + @Override + public BatchedEntries<OpenFileEntry> listOpenFiles(long prevId) + throws IOException { + return listOpenFiles(prevId, EnumSet.of(OpenFilesType.ALL_OPEN_FILES), + OpenFilesIterator.FILTER_PATH_DEFAULT); + } + + @Override + public BatchedEntries<OpenFileEntry> listOpenFiles(long prevId, + EnumSet<OpenFilesType> openFilesTypes, String path) throws IOException { + checkOperation(OperationCategory.READ, false); + return null; + } + + /** + * Locate the location with the matching block pool id. + * + * @param path Path to check. + * @param failIfLocked Fail the request if locked (top mount point). + * @param blockPoolId The block pool ID of the namespace to search for. + * @return Prioritized list of locations in the federated cluster. + * @throws IOException if the location for this path cannot be determined. + */ + private RemoteLocation getLocationForPath( + String path, boolean failIfLocked, String blockPoolId) + throws IOException { + + final List<RemoteLocation> locations = + getLocationsForPath(path, failIfLocked); + + String nameserviceId = null; + Set<FederationNamespaceInfo> namespaces = + this.namenodeResolver.getNamespaces(); + for (FederationNamespaceInfo namespace : namespaces) { + if (namespace.getBlockPoolId().equals(blockPoolId)) { + nameserviceId = namespace.getNameserviceId(); + break; + } + } + if (nameserviceId != null) { + for (RemoteLocation location : locations) { + if (location.getNameserviceId().equals(nameserviceId)) { + return location; + } + } + } + throw new IOException( + "Cannot locate a nameservice for block pool " + blockPoolId); + } + + /** + * Get the possible locations of a path in the federated cluster. + * + * @param path Path to check. + * @param failIfLocked Fail the request if locked (top mount point). + * @return Prioritized list of locations in the federated cluster. + * @throws IOException If the location for this path cannot be determined. + */ + protected List<RemoteLocation> getLocationsForPath( + String path, boolean failIfLocked) throws IOException { + try { + // Check the location for this path + final PathLocation location = + this.subclusterResolver.getDestinationForPath(path); + if (location == null) { + throw new IOException("Cannot find locations for " + path + " in " + + this.subclusterResolver); + } + + // We may block some write operations + if (opCategory.get() == OperationCategory.WRITE) { + // Check if the path is in a read only mount point + if (isPathReadOnly(path)) { + if (this.rpcMonitor != null) { + this.rpcMonitor.routerFailureReadOnly(); + } + throw new IOException(path + " is in a read only mount point"); + } + + // Check quota + if (this.router.isQuotaEnabled()) { + RouterQuotaUsage quotaUsage = this.router.getQuotaManager() + .getQuotaUsage(path); + if (quotaUsage != null) { + quotaUsage.verifyNamespaceQuota(); + quotaUsage.verifyStoragespaceQuota(); + } + } + } + + return location.getDestinations(); + } catch (IOException ioe) { + if (this.rpcMonitor != null) { + this.rpcMonitor.routerFailureStateStore(); + } + throw ioe; + } + } + + /** + * Check if a path is in a read only mount point. + * + * @param path Path to check. + * @return If the path is in a read only mount point. + */ + private boolean isPathReadOnly(final String path) { + if (subclusterResolver instanceof MountTableResolver) { + try { + MountTableResolver mountTable = (MountTableResolver)subclusterResolver; + MountTable entry = mountTable.getMountPoint(path); + if (entry != null && entry.isReadOnly()) { + return true; + } + } catch (IOException e) { + LOG.error("Cannot get mount point: {}", e.getMessage()); + } + } + return false; + } + + /** + * 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<>(); + // TODO add when we have a Mount Table + 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. + */ + private 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; + try { + // TODO support users, it should be the user for the pointed folder + UserGroupInformation ugi = getRemoteUser(); + owner = ugi.getUserName(); + group = ugi.getPrimaryGroupName(); + } catch (IOException e) { + LOG.error("Cannot get the remote user: {}", e.getMessage()); + } + long inodeId = 0; + return new HdfsFileStatus.Builder() + .isdir(true) + .mtime(modTime) + .atime(accessTime) + .perm(permission) + .owner(owner) + .group(group) + .symlink(new byte[0]) + .path(DFSUtil.string2Bytes(name)) + .fileId(inodeId) + .children(childrenNum) + .build(); + } + + /** + * Get the name of the method that is calling this function. + * + * @return Name of the method calling this function. + */ + private static String getMethodName() { + final StackTraceElement[] stack = Thread.currentThread().getStackTrace(); + String methodName = stack[3].getMethodName(); + return methodName; + } + + /** + * Get the user that is invoking this operation. + * + * @return Remote user group information. + * @throws IOException If we cannot get the user information. + */ + static UserGroupInformation getRemoteUser() throws IOException { + UserGroupInformation ugi = Server.getRemoteUser(); + return (ugi != null) ? ugi : UserGroupInformation.getCurrentUser(); + } + + /** + * Merge the outputs from multiple namespaces. + * @param map Namespace -> Output array. + * @param clazz Class of the values. + * @return Array with the outputs. + */ + protected static <T> T[] merge( + Map<FederationNamespaceInfo, T[]> map, Class<T> clazz) { + + // Put all results into a set to avoid repeats + Set<T> ret = new LinkedHashSet<>(); + for (T[] values : map.values()) { + for (T val : values) { + ret.add(val); + } + } + + return toArray(ret, clazz); + } + + /** + * Convert a set of values into an array. + * @param set Input set. + * @param clazz Class of the values. + * @return Array with the values in set. + */ + private static <T> T[] toArray(Set<T> set, Class<T> clazz) { + @SuppressWarnings("unchecked") + T[] combinedData = (T[]) Array.newInstance(clazz, set.size()); + combinedData = set.toArray(combinedData); + return combinedData; + } + + /** + * Get quota module implement. + */ + public Quota getQuotaModule() { + return this.quotaCall; + } + + /** + * Get RPC metrics info. + * @return The instance of FederationRPCMetrics. + */ + public FederationRPCMetrics getRPCMetrics() { + return this.rpcMonitor.getRPCMetrics(); + } +}
http://git-wip-us.apache.org/repos/asf/hadoop/blob/87700d45/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/RouterSafeModeException.java ---------------------------------------------------------------------- diff --git a/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/RouterSafeModeException.java b/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/RouterSafeModeException.java new file mode 100644 index 0000000..7a78b5b --- /dev/null +++ b/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/RouterSafeModeException.java @@ -0,0 +1,53 @@ +/** + * 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 org.apache.hadoop.hdfs.server.namenode.NameNode.OperationCategory; +import org.apache.hadoop.ipc.StandbyException; + +/** + * Exception that the Router throws when it is in safe mode. This extends + * {@link StandbyException} for the client to try another Router when it gets + * this exception. + */ +public class RouterSafeModeException extends StandbyException { + + private static final long serialVersionUID = 453568188334993493L; + + /** Identifier of the Router that generated this exception. */ + private final String routerId; + + /** + * Build a new Router safe mode exception. + * @param router Identifier of the Router. + * @param op Category of the operation (READ/WRITE). + */ + public RouterSafeModeException(String router, OperationCategory op) { + super("Router " + router + " is in safe mode and cannot handle " + op + + " requests."); + this.routerId = router; + } + + /** + * Get the id of the Router that generated this exception. + * @return Id of the Router that generated this exception. + */ + public String getRouterId() { + return this.routerId; + } +} --------------------------------------------------------------------- To unsubscribe, e-mail: common-commits-unsubscr...@hadoop.apache.org For additional commands, e-mail: common-commits-h...@hadoop.apache.org
