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Posted to common-commits@hadoop.apache.org by we...@apache.org on 2018/03/20 06:06:26 UTC
[33/39] hadoop git commit: HDFS-13215. RBF: Move Router to its own
module.
http://git-wip-us.apache.org/repos/asf/hadoop/blob/c804b284/hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/RouterRpcServer.java
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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/c804b284/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;
+ }
+}
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