HDFS-2566. Move BPOfferService to be a non-inner class. Contributed by Todd Lipcon.
git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1204659 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Todd Lipcon
parent
68173af69d
commit
39ce694d05
@ -142,6 +142,8 @@ Release 0.23.1 - UNRELEASED
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HDFS-2536. Remove unused imports. (harsh via eli)
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HDFS-2566. Move BPOfferService to be a non-inner class. (todd)
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OPTIMIZATIONS
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HDFS-2130. Switch default checksum to CRC32C. (todd)
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@ -0,0 +1,782 @@
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/**
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.hadoop.hdfs.server.datanode;
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import static org.apache.hadoop.hdfs.server.common.Util.now;
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import java.io.IOException;
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import java.net.InetSocketAddress;
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import java.net.SocketTimeoutException;
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import java.net.URI;
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import java.util.Collection;
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import java.util.LinkedList;
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import org.apache.commons.logging.Log;
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import org.apache.hadoop.classification.InterfaceAudience;
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import org.apache.hadoop.hdfs.DFSUtil;
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import org.apache.hadoop.hdfs.protocol.Block;
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import org.apache.hadoop.hdfs.protocol.BlockListAsLongs;
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import org.apache.hadoop.hdfs.protocol.DatanodeInfo;
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import org.apache.hadoop.hdfs.protocol.ExtendedBlock;
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import org.apache.hadoop.hdfs.protocol.HdfsConstants;
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import org.apache.hadoop.hdfs.protocol.LocatedBlock;
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import org.apache.hadoop.hdfs.protocol.UnregisteredNodeException;
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import org.apache.hadoop.hdfs.server.common.IncorrectVersionException;
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import org.apache.hadoop.hdfs.server.common.Storage;
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import org.apache.hadoop.hdfs.server.namenode.FSNamesystem;
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import org.apache.hadoop.hdfs.server.protocol.BalancerBandwidthCommand;
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import org.apache.hadoop.hdfs.server.protocol.BlockCommand;
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import org.apache.hadoop.hdfs.server.protocol.BlockRecoveryCommand;
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import org.apache.hadoop.hdfs.server.protocol.DatanodeCommand;
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import org.apache.hadoop.hdfs.server.protocol.DatanodeProtocol;
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import org.apache.hadoop.hdfs.server.protocol.DatanodeRegistration;
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import org.apache.hadoop.hdfs.server.protocol.DisallowedDatanodeException;
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import org.apache.hadoop.hdfs.server.protocol.FinalizeCommand;
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import org.apache.hadoop.hdfs.server.protocol.KeyUpdateCommand;
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import org.apache.hadoop.hdfs.server.protocol.NamespaceInfo;
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import org.apache.hadoop.hdfs.server.protocol.ReceivedDeletedBlockInfo;
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import org.apache.hadoop.hdfs.server.protocol.UpgradeCommand;
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import org.apache.hadoop.ipc.RPC;
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import org.apache.hadoop.ipc.RemoteException;
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import org.apache.hadoop.util.StringUtils;
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import com.google.common.annotations.VisibleForTesting;
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import com.google.common.base.Preconditions;
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/**
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* A thread per namenode to perform:
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* <ul>
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* <li> Pre-registration handshake with namenode</li>
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* <li> Registration with namenode</li>
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* <li> Send periodic heartbeats to the namenode</li>
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* <li> Handle commands received from the namenode</li>
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* </ul>
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*/
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@InterfaceAudience.Private
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class BPOfferService implements Runnable {
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static final Log LOG = DataNode.LOG;
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final InetSocketAddress nnAddr;
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/**
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* Information about the namespace that this service
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* is registering with. This is assigned after
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* the first phase of the handshake.
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*/
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NamespaceInfo bpNSInfo;
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/**
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* The registration information for this block pool.
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* This is assigned after the second phase of the
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* handshake.
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*/
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DatanodeRegistration bpRegistration;
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long lastBlockReport = 0;
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long lastDeletedReport = 0;
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boolean resetBlockReportTime = true;
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Thread bpThread;
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DatanodeProtocol bpNamenode;
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private long lastHeartbeat = 0;
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private volatile boolean initialized = false;
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private final LinkedList<ReceivedDeletedBlockInfo> receivedAndDeletedBlockList
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= new LinkedList<ReceivedDeletedBlockInfo>();
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private volatile int pendingReceivedRequests = 0;
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private volatile boolean shouldServiceRun = true;
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UpgradeManagerDatanode upgradeManager = null;
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private final DataNode dn;
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private final DNConf dnConf;
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BPOfferService(InetSocketAddress nnAddr, DataNode dn) {
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this.dn = dn;
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this.nnAddr = nnAddr;
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this.dnConf = dn.getDnConf();
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}
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/**
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* returns true if BP thread has completed initialization of storage
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* and has registered with the corresponding namenode
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* @return true if initialized
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*/
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public boolean isInitialized() {
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return initialized;
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}
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public boolean isAlive() {
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return shouldServiceRun && bpThread.isAlive();
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}
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public String getBlockPoolId() {
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if (bpNSInfo != null) {
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return bpNSInfo.getBlockPoolID();
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} else {
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LOG.warn("Block pool ID needed, but service not yet registered with NN",
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new Exception("trace"));
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return null;
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}
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}
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public NamespaceInfo getNamespaceInfo() {
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return bpNSInfo;
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}
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public String toString() {
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if (bpNSInfo == null) {
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// If we haven't yet connected to our NN, we don't yet know our
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// own block pool ID.
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// If _none_ of the block pools have connected yet, we don't even
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// know the storage ID of this DN.
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String storageId = dn.getStorageId();
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if (storageId == null || "".equals(storageId)) {
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storageId = "unknown";
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}
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return "Block pool <registering> (storage id " + storageId +
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") connecting to " + nnAddr;
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} else {
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return "Block pool " + getBlockPoolId() +
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" (storage id " + dn.getStorageId() +
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") registered with " + nnAddr;
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}
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}
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InetSocketAddress getNNSocketAddress() {
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return nnAddr;
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}
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/**
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* Used to inject a spy NN in the unit tests.
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*/
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@VisibleForTesting
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void setNameNode(DatanodeProtocol dnProtocol) {
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bpNamenode = dnProtocol;
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}
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/**
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* Perform the first part of the handshake with the NameNode.
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* This calls <code>versionRequest</code> to determine the NN's
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* namespace and version info. It automatically retries until
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* the NN responds or the DN is shutting down.
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*
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* @return the NamespaceInfo
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* @throws IncorrectVersionException if the remote NN does not match
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* this DN's version
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*/
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NamespaceInfo retrieveNamespaceInfo() throws IncorrectVersionException {
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NamespaceInfo nsInfo = null;
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while (shouldRun()) {
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try {
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nsInfo = bpNamenode.versionRequest();
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LOG.debug(this + " received versionRequest response: " + nsInfo);
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break;
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} catch(SocketTimeoutException e) { // namenode is busy
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LOG.warn("Problem connecting to server: " + nnAddr);
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} catch(IOException e ) { // namenode is not available
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LOG.warn("Problem connecting to server: " + nnAddr);
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}
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// try again in a second
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sleepAndLogInterrupts(5000, "requesting version info from NN");
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}
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if (nsInfo != null) {
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checkNNVersion(nsInfo);
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}
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return nsInfo;
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}
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private void checkNNVersion(NamespaceInfo nsInfo)
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throws IncorrectVersionException {
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// build and layout versions should match
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String nsBuildVer = nsInfo.getBuildVersion();
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String stBuildVer = Storage.getBuildVersion();
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if (!nsBuildVer.equals(stBuildVer)) {
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LOG.warn("Data-node and name-node Build versions must be the same. " +
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"Namenode build version: " + nsBuildVer + "Datanode " +
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"build version: " + stBuildVer);
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throw new IncorrectVersionException(nsBuildVer, "namenode", stBuildVer);
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}
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if (HdfsConstants.LAYOUT_VERSION != nsInfo.getLayoutVersion()) {
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LOG.warn("Data-node and name-node layout versions must be the same." +
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" Expected: "+ HdfsConstants.LAYOUT_VERSION +
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" actual "+ bpNSInfo.getLayoutVersion());
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throw new IncorrectVersionException(
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bpNSInfo.getLayoutVersion(), "namenode");
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}
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}
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private void connectToNNAndHandshake() throws IOException {
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// get NN proxy
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bpNamenode = (DatanodeProtocol)RPC.waitForProxy(DatanodeProtocol.class,
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DatanodeProtocol.versionID, nnAddr, dn.getConf());
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// First phase of the handshake with NN - get the namespace
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// info.
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bpNSInfo = retrieveNamespaceInfo();
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// Now that we know the namespace ID, etc, we can pass this to the DN.
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// The DN can now initialize its local storage if we are the
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// first BP to handshake, etc.
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dn.initBlockPool(this);
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// Second phase of the handshake with the NN.
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register();
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}
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/**
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* This methods arranges for the data node to send the block report at
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* the next heartbeat.
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*/
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void scheduleBlockReport(long delay) {
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if (delay > 0) { // send BR after random delay
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lastBlockReport = System.currentTimeMillis()
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- ( dnConf.blockReportInterval - DFSUtil.getRandom().nextInt((int)(delay)));
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} else { // send at next heartbeat
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lastBlockReport = lastHeartbeat - dnConf.blockReportInterval;
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}
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resetBlockReportTime = true; // reset future BRs for randomness
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}
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void reportBadBlocks(ExtendedBlock block) {
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DatanodeInfo[] dnArr = { new DatanodeInfo(bpRegistration) };
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LocatedBlock[] blocks = { new LocatedBlock(block, dnArr) };
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try {
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bpNamenode.reportBadBlocks(blocks);
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} catch (IOException e){
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/* One common reason is that NameNode could be in safe mode.
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* Should we keep on retrying in that case?
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*/
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LOG.warn("Failed to report bad block " + block + " to namenode : "
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+ " Exception", e);
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}
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}
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/**
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* Report received blocks and delete hints to the Namenode
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*
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* @throws IOException
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*/
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private void reportReceivedDeletedBlocks() throws IOException {
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// check if there are newly received blocks
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ReceivedDeletedBlockInfo[] receivedAndDeletedBlockArray = null;
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int currentReceivedRequestsCounter;
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synchronized (receivedAndDeletedBlockList) {
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currentReceivedRequestsCounter = pendingReceivedRequests;
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int numBlocks = receivedAndDeletedBlockList.size();
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if (numBlocks > 0) {
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//
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// Send newly-received and deleted blockids to namenode
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//
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receivedAndDeletedBlockArray = receivedAndDeletedBlockList
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.toArray(new ReceivedDeletedBlockInfo[numBlocks]);
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}
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}
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if (receivedAndDeletedBlockArray != null) {
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bpNamenode.blockReceivedAndDeleted(bpRegistration, getBlockPoolId(),
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receivedAndDeletedBlockArray);
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synchronized (receivedAndDeletedBlockList) {
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for (int i = 0; i < receivedAndDeletedBlockArray.length; i++) {
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receivedAndDeletedBlockList.remove(receivedAndDeletedBlockArray[i]);
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}
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pendingReceivedRequests -= currentReceivedRequestsCounter;
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}
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}
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}
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/*
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* Informing the name node could take a long long time! Should we wait
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* till namenode is informed before responding with success to the
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* client? For now we don't.
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*/
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void notifyNamenodeReceivedBlock(ExtendedBlock block, String delHint) {
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if (block == null || delHint == null) {
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throw new IllegalArgumentException(block == null ? "Block is null"
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: "delHint is null");
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}
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if (!block.getBlockPoolId().equals(getBlockPoolId())) {
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LOG.warn("BlockPool mismatch " + block.getBlockPoolId() + " vs. "
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+ getBlockPoolId());
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return;
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}
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synchronized (receivedAndDeletedBlockList) {
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receivedAndDeletedBlockList.add(new ReceivedDeletedBlockInfo(block
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.getLocalBlock(), delHint));
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pendingReceivedRequests++;
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receivedAndDeletedBlockList.notifyAll();
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}
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}
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void notifyNamenodeDeletedBlock(ExtendedBlock block) {
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if (block == null) {
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throw new IllegalArgumentException("Block is null");
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}
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if (!block.getBlockPoolId().equals(getBlockPoolId())) {
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LOG.warn("BlockPool mismatch " + block.getBlockPoolId() + " vs. "
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+ getBlockPoolId());
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return;
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}
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synchronized (receivedAndDeletedBlockList) {
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receivedAndDeletedBlockList.add(new ReceivedDeletedBlockInfo(block
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.getLocalBlock(), ReceivedDeletedBlockInfo.TODELETE_HINT));
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}
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}
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/**
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* Report the list blocks to the Namenode
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* @throws IOException
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*/
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DatanodeCommand blockReport() throws IOException {
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// send block report if timer has expired.
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DatanodeCommand cmd = null;
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long startTime = now();
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if (startTime - lastBlockReport > dnConf.blockReportInterval) {
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// Create block report
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long brCreateStartTime = now();
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BlockListAsLongs bReport = dn.data.getBlockReport(getBlockPoolId());
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// Send block report
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long brSendStartTime = now();
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cmd = bpNamenode.blockReport(bpRegistration, getBlockPoolId(), bReport
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.getBlockListAsLongs());
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// Log the block report processing stats from Datanode perspective
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long brSendCost = now() - brSendStartTime;
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long brCreateCost = brSendStartTime - brCreateStartTime;
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dn.metrics.addBlockReport(brSendCost);
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LOG.info("BlockReport of " + bReport.getNumberOfBlocks()
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+ " blocks took " + brCreateCost + " msec to generate and "
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+ brSendCost + " msecs for RPC and NN processing");
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// If we have sent the first block report, then wait a random
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// time before we start the periodic block reports.
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if (resetBlockReportTime) {
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lastBlockReport = startTime - DFSUtil.getRandom().nextInt((int)(dnConf.blockReportInterval));
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resetBlockReportTime = false;
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} else {
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/* say the last block report was at 8:20:14. The current report
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* should have started around 9:20:14 (default 1 hour interval).
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* If current time is :
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* 1) normal like 9:20:18, next report should be at 10:20:14
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* 2) unexpected like 11:35:43, next report should be at 12:20:14
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*/
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lastBlockReport += (now() - lastBlockReport) /
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dnConf.blockReportInterval * dnConf.blockReportInterval;
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}
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LOG.info("sent block report, processed command:" + cmd);
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}
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return cmd;
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}
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DatanodeCommand [] sendHeartBeat() throws IOException {
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return bpNamenode.sendHeartbeat(bpRegistration,
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dn.data.getCapacity(),
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dn.data.getDfsUsed(),
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dn.data.getRemaining(),
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dn.data.getBlockPoolUsed(getBlockPoolId()),
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dn.xmitsInProgress.get(),
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dn.getXceiverCount(), dn.data.getNumFailedVolumes());
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}
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//This must be called only by blockPoolManager
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void start() {
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if ((bpThread != null) && (bpThread.isAlive())) {
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//Thread is started already
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return;
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}
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bpThread = new Thread(this, formatThreadName());
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bpThread.setDaemon(true); // needed for JUnit testing
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bpThread.start();
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}
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private String formatThreadName() {
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Collection<URI> dataDirs = DataNode.getStorageDirs(dn.getConf());
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return "DataNode: [" +
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StringUtils.uriToString(dataDirs.toArray(new URI[0])) + "] " +
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" heartbeating to " + nnAddr;
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}
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//This must be called only by blockPoolManager.
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void stop() {
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shouldServiceRun = false;
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if (bpThread != null) {
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bpThread.interrupt();
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}
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}
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//This must be called only by blockPoolManager
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void join() {
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try {
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if (bpThread != null) {
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bpThread.join();
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}
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} catch (InterruptedException ie) { }
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}
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//Cleanup method to be called by current thread before exiting.
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private synchronized void cleanUp() {
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if(upgradeManager != null)
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upgradeManager.shutdownUpgrade();
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shouldServiceRun = false;
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RPC.stopProxy(bpNamenode);
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dn.shutdownBlockPool(this);
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}
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/**
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* Main loop for each BP thread. Run until shutdown,
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* forever calling remote NameNode functions.
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*/
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private void offerService() throws Exception {
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LOG.info("For namenode " + nnAddr + " using DELETEREPORT_INTERVAL of "
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+ dnConf.deleteReportInterval + " msec " + " BLOCKREPORT_INTERVAL of "
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+ dnConf.blockReportInterval + "msec" + " Initial delay: "
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+ dnConf.initialBlockReportDelay + "msec" + "; heartBeatInterval="
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+ dnConf.heartBeatInterval);
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//
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// Now loop for a long time....
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//
|
||||
while (shouldRun()) {
|
||||
try {
|
||||
long startTime = now();
|
||||
|
||||
//
|
||||
// Every so often, send heartbeat or block-report
|
||||
//
|
||||
if (startTime - lastHeartbeat > dnConf.heartBeatInterval) {
|
||||
//
|
||||
// All heartbeat messages include following info:
|
||||
// -- Datanode name
|
||||
// -- data transfer port
|
||||
// -- Total capacity
|
||||
// -- Bytes remaining
|
||||
//
|
||||
lastHeartbeat = startTime;
|
||||
if (!dn.areHeartbeatsDisabledForTests()) {
|
||||
DatanodeCommand[] cmds = sendHeartBeat();
|
||||
dn.metrics.addHeartbeat(now() - startTime);
|
||||
|
||||
long startProcessCommands = now();
|
||||
if (!processCommand(cmds))
|
||||
continue;
|
||||
long endProcessCommands = now();
|
||||
if (endProcessCommands - startProcessCommands > 2000) {
|
||||
LOG.info("Took " + (endProcessCommands - startProcessCommands) +
|
||||
"ms to process " + cmds.length + " commands from NN");
|
||||
}
|
||||
}
|
||||
}
|
||||
if (pendingReceivedRequests > 0
|
||||
|| (startTime - lastDeletedReport > dnConf.deleteReportInterval)) {
|
||||
reportReceivedDeletedBlocks();
|
||||
lastDeletedReport = startTime;
|
||||
}
|
||||
|
||||
DatanodeCommand cmd = blockReport();
|
||||
processCommand(cmd);
|
||||
|
||||
// Now safe to start scanning the block pool
|
||||
if (dn.blockScanner != null) {
|
||||
dn.blockScanner.addBlockPool(this.getBlockPoolId());
|
||||
}
|
||||
|
||||
//
|
||||
// There is no work to do; sleep until hearbeat timer elapses,
|
||||
// or work arrives, and then iterate again.
|
||||
//
|
||||
long waitTime = dnConf.heartBeatInterval -
|
||||
(System.currentTimeMillis() - lastHeartbeat);
|
||||
synchronized(receivedAndDeletedBlockList) {
|
||||
if (waitTime > 0 && pendingReceivedRequests == 0) {
|
||||
try {
|
||||
receivedAndDeletedBlockList.wait(waitTime);
|
||||
} catch (InterruptedException ie) {
|
||||
LOG.warn("BPOfferService for " + this + " interrupted");
|
||||
}
|
||||
}
|
||||
} // synchronized
|
||||
} catch(RemoteException re) {
|
||||
String reClass = re.getClassName();
|
||||
if (UnregisteredNodeException.class.getName().equals(reClass) ||
|
||||
DisallowedDatanodeException.class.getName().equals(reClass) ||
|
||||
IncorrectVersionException.class.getName().equals(reClass)) {
|
||||
LOG.warn(this + " is shutting down", re);
|
||||
shouldServiceRun = false;
|
||||
return;
|
||||
}
|
||||
LOG.warn("RemoteException in offerService", re);
|
||||
try {
|
||||
long sleepTime = Math.min(1000, dnConf.heartBeatInterval);
|
||||
Thread.sleep(sleepTime);
|
||||
} catch (InterruptedException ie) {
|
||||
Thread.currentThread().interrupt();
|
||||
}
|
||||
} catch (IOException e) {
|
||||
LOG.warn("IOException in offerService", e);
|
||||
}
|
||||
} // while (shouldRun())
|
||||
} // offerService
|
||||
|
||||
/**
|
||||
* Register one bp with the corresponding NameNode
|
||||
* <p>
|
||||
* The bpDatanode needs to register with the namenode on startup in order
|
||||
* 1) to report which storage it is serving now and
|
||||
* 2) to receive a registrationID
|
||||
*
|
||||
* issued by the namenode to recognize registered datanodes.
|
||||
*
|
||||
* @see FSNamesystem#registerDatanode(DatanodeRegistration)
|
||||
* @throws IOException
|
||||
*/
|
||||
void register() throws IOException {
|
||||
Preconditions.checkState(bpNSInfo != null,
|
||||
"register() should be called after handshake()");
|
||||
|
||||
// The handshake() phase loaded the block pool storage
|
||||
// off disk - so update the bpRegistration object from that info
|
||||
bpRegistration = dn.createBPRegistration(bpNSInfo);
|
||||
|
||||
LOG.info(this + " beginning handshake with NN");
|
||||
|
||||
while (shouldRun()) {
|
||||
try {
|
||||
// Use returned registration from namenode with updated machine name.
|
||||
bpRegistration = bpNamenode.registerDatanode(bpRegistration);
|
||||
break;
|
||||
} catch(SocketTimeoutException e) { // namenode is busy
|
||||
LOG.info("Problem connecting to server: " + nnAddr);
|
||||
sleepAndLogInterrupts(1000, "connecting to server");
|
||||
}
|
||||
}
|
||||
|
||||
LOG.info("Block pool " + this + " successfully registered with NN");
|
||||
dn.bpRegistrationSucceeded(bpRegistration, getBlockPoolId());
|
||||
|
||||
// random short delay - helps scatter the BR from all DNs
|
||||
scheduleBlockReport(dnConf.initialBlockReportDelay);
|
||||
}
|
||||
|
||||
|
||||
private void sleepAndLogInterrupts(int millis,
|
||||
String stateString) {
|
||||
try {
|
||||
Thread.sleep(millis);
|
||||
} catch (InterruptedException ie) {
|
||||
LOG.info("BPOfferService " + this +
|
||||
" interrupted while " + stateString);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* No matter what kind of exception we get, keep retrying to offerService().
|
||||
* That's the loop that connects to the NameNode and provides basic DataNode
|
||||
* functionality.
|
||||
*
|
||||
* Only stop when "shouldRun" or "shouldServiceRun" is turned off, which can
|
||||
* happen either at shutdown or due to refreshNamenodes.
|
||||
*/
|
||||
@Override
|
||||
public void run() {
|
||||
LOG.info(this + " starting to offer service");
|
||||
|
||||
try {
|
||||
// init stuff
|
||||
try {
|
||||
// setup storage
|
||||
connectToNNAndHandshake();
|
||||
} catch (IOException ioe) {
|
||||
// Initial handshake, storage recovery or registration failed
|
||||
// End BPOfferService thread
|
||||
LOG.fatal("Initialization failed for block pool " + this, ioe);
|
||||
return;
|
||||
}
|
||||
|
||||
initialized = true; // bp is initialized;
|
||||
|
||||
while (shouldRun()) {
|
||||
try {
|
||||
startDistributedUpgradeIfNeeded();
|
||||
offerService();
|
||||
} catch (Exception ex) {
|
||||
LOG.error("Exception in BPOfferService for " + this, ex);
|
||||
sleepAndLogInterrupts(5000, "offering service");
|
||||
}
|
||||
}
|
||||
} catch (Throwable ex) {
|
||||
LOG.warn("Unexpected exception in block pool " + this, ex);
|
||||
} finally {
|
||||
LOG.warn("Ending block pool service for: " + this);
|
||||
cleanUp();
|
||||
}
|
||||
}
|
||||
|
||||
private boolean shouldRun() {
|
||||
return shouldServiceRun && dn.shouldRun();
|
||||
}
|
||||
|
||||
/**
|
||||
* Process an array of datanode commands
|
||||
*
|
||||
* @param cmds an array of datanode commands
|
||||
* @return true if further processing may be required or false otherwise.
|
||||
*/
|
||||
private boolean processCommand(DatanodeCommand[] cmds) {
|
||||
if (cmds != null) {
|
||||
for (DatanodeCommand cmd : cmds) {
|
||||
try {
|
||||
if (processCommand(cmd) == false) {
|
||||
return false;
|
||||
}
|
||||
} catch (IOException ioe) {
|
||||
LOG.warn("Error processing datanode Command", ioe);
|
||||
}
|
||||
}
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
/**
|
||||
*
|
||||
* @param cmd
|
||||
* @return true if further processing may be required or false otherwise.
|
||||
* @throws IOException
|
||||
*/
|
||||
private boolean processCommand(DatanodeCommand cmd) throws IOException {
|
||||
if (cmd == null)
|
||||
return true;
|
||||
final BlockCommand bcmd =
|
||||
cmd instanceof BlockCommand? (BlockCommand)cmd: null;
|
||||
|
||||
switch(cmd.getAction()) {
|
||||
case DatanodeProtocol.DNA_TRANSFER:
|
||||
// Send a copy of a block to another datanode
|
||||
dn.transferBlocks(bcmd.getBlockPoolId(), bcmd.getBlocks(), bcmd.getTargets());
|
||||
dn.metrics.incrBlocksReplicated(bcmd.getBlocks().length);
|
||||
break;
|
||||
case DatanodeProtocol.DNA_INVALIDATE:
|
||||
//
|
||||
// Some local block(s) are obsolete and can be
|
||||
// safely garbage-collected.
|
||||
//
|
||||
Block toDelete[] = bcmd.getBlocks();
|
||||
try {
|
||||
if (dn.blockScanner != null) {
|
||||
dn.blockScanner.deleteBlocks(bcmd.getBlockPoolId(), toDelete);
|
||||
}
|
||||
// using global fsdataset
|
||||
dn.data.invalidate(bcmd.getBlockPoolId(), toDelete);
|
||||
} catch(IOException e) {
|
||||
dn.checkDiskError();
|
||||
throw e;
|
||||
}
|
||||
dn.metrics.incrBlocksRemoved(toDelete.length);
|
||||
break;
|
||||
case DatanodeProtocol.DNA_SHUTDOWN:
|
||||
// shut down the data node
|
||||
shouldServiceRun = false;
|
||||
return false;
|
||||
case DatanodeProtocol.DNA_REGISTER:
|
||||
// namenode requested a registration - at start or if NN lost contact
|
||||
LOG.info("DatanodeCommand action: DNA_REGISTER");
|
||||
if (shouldRun()) {
|
||||
// re-retrieve namespace info to make sure that, if the NN
|
||||
// was restarted, we still match its version (HDFS-2120)
|
||||
retrieveNamespaceInfo();
|
||||
// and re-register
|
||||
register();
|
||||
}
|
||||
break;
|
||||
case DatanodeProtocol.DNA_FINALIZE:
|
||||
String bp = ((FinalizeCommand) cmd).getBlockPoolId();
|
||||
assert getBlockPoolId().equals(bp) :
|
||||
"BP " + getBlockPoolId() + " received DNA_FINALIZE " +
|
||||
"for other block pool " + bp;
|
||||
|
||||
dn.finalizeUpgradeForPool(bp);
|
||||
break;
|
||||
case UpgradeCommand.UC_ACTION_START_UPGRADE:
|
||||
// start distributed upgrade here
|
||||
processDistributedUpgradeCommand((UpgradeCommand)cmd);
|
||||
break;
|
||||
case DatanodeProtocol.DNA_RECOVERBLOCK:
|
||||
dn.recoverBlocks(((BlockRecoveryCommand)cmd).getRecoveringBlocks());
|
||||
break;
|
||||
case DatanodeProtocol.DNA_ACCESSKEYUPDATE:
|
||||
LOG.info("DatanodeCommand action: DNA_ACCESSKEYUPDATE");
|
||||
if (dn.isBlockTokenEnabled) {
|
||||
dn.blockPoolTokenSecretManager.setKeys(getBlockPoolId(),
|
||||
((KeyUpdateCommand) cmd).getExportedKeys());
|
||||
}
|
||||
break;
|
||||
case DatanodeProtocol.DNA_BALANCERBANDWIDTHUPDATE:
|
||||
LOG.info("DatanodeCommand action: DNA_BALANCERBANDWIDTHUPDATE");
|
||||
long bandwidth =
|
||||
((BalancerBandwidthCommand) cmd).getBalancerBandwidthValue();
|
||||
if (bandwidth > 0) {
|
||||
DataXceiverServer dxcs =
|
||||
(DataXceiverServer) dn.dataXceiverServer.getRunnable();
|
||||
dxcs.balanceThrottler.setBandwidth(bandwidth);
|
||||
}
|
||||
break;
|
||||
default:
|
||||
LOG.warn("Unknown DatanodeCommand action: " + cmd.getAction());
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
private void processDistributedUpgradeCommand(UpgradeCommand comm)
|
||||
throws IOException {
|
||||
UpgradeManagerDatanode upgradeManager = getUpgradeManager();
|
||||
upgradeManager.processUpgradeCommand(comm);
|
||||
}
|
||||
|
||||
synchronized UpgradeManagerDatanode getUpgradeManager() {
|
||||
if(upgradeManager == null)
|
||||
upgradeManager =
|
||||
new UpgradeManagerDatanode(dn, getBlockPoolId());
|
||||
|
||||
return upgradeManager;
|
||||
}
|
||||
|
||||
/**
|
||||
* Start distributed upgrade if it should be initiated by the data-node.
|
||||
*/
|
||||
private void startDistributedUpgradeIfNeeded() throws IOException {
|
||||
UpgradeManagerDatanode um = getUpgradeManager();
|
||||
|
||||
if(!um.getUpgradeState())
|
||||
return;
|
||||
um.setUpgradeState(false, um.getUpgradeVersion());
|
||||
um.startUpgrade();
|
||||
return;
|
||||
}
|
||||
|
||||
}
|
||||
@ -31,7 +31,6 @@
|
||||
import org.apache.hadoop.conf.Configuration;
|
||||
import org.apache.hadoop.hdfs.protocol.Block;
|
||||
import org.apache.hadoop.hdfs.protocol.ExtendedBlock;
|
||||
import org.apache.hadoop.hdfs.server.datanode.DataNode.BPOfferService;
|
||||
import org.apache.commons.logging.Log;
|
||||
import org.apache.commons.logging.LogFactory;
|
||||
|
||||
|
||||
@ -50,7 +50,6 @@
|
||||
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_FEDERATION_NAMESERVICES;
|
||||
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_WEBHDFS_ENABLED_KEY;
|
||||
import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_WEBHDFS_ENABLED_DEFAULT;
|
||||
import static org.apache.hadoop.hdfs.server.common.Util.now;
|
||||
|
||||
import java.io.BufferedOutputStream;
|
||||
import java.io.DataInputStream;
|
||||
@ -61,7 +60,6 @@
|
||||
import java.net.InetSocketAddress;
|
||||
import java.net.ServerSocket;
|
||||
import java.net.Socket;
|
||||
import java.net.SocketTimeoutException;
|
||||
import java.net.URI;
|
||||
import java.net.UnknownHostException;
|
||||
import java.nio.channels.ServerSocketChannel;
|
||||
@ -74,7 +72,6 @@
|
||||
import java.util.Collection;
|
||||
import java.util.EnumSet;
|
||||
import java.util.HashMap;
|
||||
import java.util.LinkedList;
|
||||
import java.util.List;
|
||||
import java.util.Map;
|
||||
import java.util.Set;
|
||||
@ -94,7 +91,6 @@
|
||||
import org.apache.hadoop.hdfs.HDFSPolicyProvider;
|
||||
import org.apache.hadoop.hdfs.HdfsConfiguration;
|
||||
import org.apache.hadoop.hdfs.protocol.Block;
|
||||
import org.apache.hadoop.hdfs.protocol.BlockListAsLongs;
|
||||
import org.apache.hadoop.hdfs.protocol.ClientDatanodeProtocol;
|
||||
import org.apache.hadoop.hdfs.protocol.DatanodeID;
|
||||
import org.apache.hadoop.hdfs.protocol.DatanodeInfo;
|
||||
@ -103,7 +99,6 @@
|
||||
import org.apache.hadoop.hdfs.protocol.HdfsProtoUtil;
|
||||
import org.apache.hadoop.hdfs.protocol.LocatedBlock;
|
||||
import org.apache.hadoop.hdfs.protocol.RecoveryInProgressException;
|
||||
import org.apache.hadoop.hdfs.protocol.UnregisteredNodeException;
|
||||
import org.apache.hadoop.hdfs.protocol.datatransfer.BlockConstructionStage;
|
||||
import org.apache.hadoop.hdfs.protocol.datatransfer.DataTransferProtocol;
|
||||
import org.apache.hadoop.hdfs.protocol.datatransfer.Sender;
|
||||
@ -118,33 +113,21 @@
|
||||
import org.apache.hadoop.hdfs.server.common.HdfsServerConstants;
|
||||
import org.apache.hadoop.hdfs.server.common.HdfsServerConstants.ReplicaState;
|
||||
import org.apache.hadoop.hdfs.server.common.HdfsServerConstants.StartupOption;
|
||||
import org.apache.hadoop.hdfs.server.common.IncorrectVersionException;
|
||||
import org.apache.hadoop.hdfs.server.common.JspHelper;
|
||||
import org.apache.hadoop.hdfs.server.common.Storage;
|
||||
import org.apache.hadoop.hdfs.server.common.StorageInfo;
|
||||
import org.apache.hadoop.hdfs.server.common.Util;
|
||||
import org.apache.hadoop.hdfs.server.datanode.FSDataset.VolumeInfo;
|
||||
import org.apache.hadoop.hdfs.server.datanode.SecureDataNodeStarter.SecureResources;
|
||||
import org.apache.hadoop.hdfs.server.datanode.metrics.DataNodeMetrics;
|
||||
import org.apache.hadoop.hdfs.server.datanode.web.resources.DatanodeWebHdfsMethods;
|
||||
import org.apache.hadoop.hdfs.server.namenode.FSNamesystem;
|
||||
import org.apache.hadoop.hdfs.server.namenode.FileChecksumServlets;
|
||||
import org.apache.hadoop.hdfs.server.namenode.StreamFile;
|
||||
import org.apache.hadoop.hdfs.server.protocol.BalancerBandwidthCommand;
|
||||
import org.apache.hadoop.hdfs.server.protocol.BlockCommand;
|
||||
import org.apache.hadoop.hdfs.server.protocol.BlockRecoveryCommand;
|
||||
import org.apache.hadoop.hdfs.server.protocol.BlockRecoveryCommand.RecoveringBlock;
|
||||
import org.apache.hadoop.hdfs.server.protocol.DatanodeCommand;
|
||||
import org.apache.hadoop.hdfs.server.protocol.DatanodeProtocol;
|
||||
import org.apache.hadoop.hdfs.server.protocol.DatanodeRegistration;
|
||||
import org.apache.hadoop.hdfs.server.protocol.DisallowedDatanodeException;
|
||||
import org.apache.hadoop.hdfs.server.protocol.FinalizeCommand;
|
||||
import org.apache.hadoop.hdfs.server.protocol.InterDatanodeProtocol;
|
||||
import org.apache.hadoop.hdfs.server.protocol.KeyUpdateCommand;
|
||||
import org.apache.hadoop.hdfs.server.protocol.NamespaceInfo;
|
||||
import org.apache.hadoop.hdfs.server.protocol.ReceivedDeletedBlockInfo;
|
||||
import org.apache.hadoop.hdfs.server.protocol.ReplicaRecoveryInfo;
|
||||
import org.apache.hadoop.hdfs.server.protocol.UpgradeCommand;
|
||||
import org.apache.hadoop.hdfs.server.protocolR23Compatible.InterDatanodeProtocolServerSideTranslatorR23;
|
||||
import org.apache.hadoop.hdfs.server.protocolR23Compatible.InterDatanodeProtocolTranslatorR23;
|
||||
import org.apache.hadoop.hdfs.server.protocolR23Compatible.InterDatanodeWireProtocol;
|
||||
@ -176,7 +159,6 @@
|
||||
import org.apache.hadoop.util.VersionInfo;
|
||||
import org.mortbay.util.ajax.JSON;
|
||||
|
||||
import com.google.common.annotations.VisibleForTesting;
|
||||
import com.google.common.base.Preconditions;
|
||||
|
||||
|
||||
@ -398,8 +380,6 @@ void refreshNamenodes(Configuration conf)
|
||||
|
||||
private volatile String hostName; // Host name of this datanode
|
||||
|
||||
private static String dnThreadName;
|
||||
|
||||
boolean isBlockTokenEnabled;
|
||||
BlockPoolTokenSecretManager blockPoolTokenSecretManager;
|
||||
|
||||
@ -691,716 +671,10 @@ void setHeartbeatsDisabledForTests(
|
||||
this.heartbeatsDisabledForTests = heartbeatsDisabledForTests;
|
||||
}
|
||||
|
||||
/**
|
||||
* A thread per namenode to perform:
|
||||
* <ul>
|
||||
* <li> Pre-registration handshake with namenode</li>
|
||||
* <li> Registration with namenode</li>
|
||||
* <li> Send periodic heartbeats to the namenode</li>
|
||||
* <li> Handle commands received from the datanode</li>
|
||||
* </ul>
|
||||
*/
|
||||
@InterfaceAudience.Private
|
||||
static class BPOfferService implements Runnable {
|
||||
final InetSocketAddress nnAddr;
|
||||
|
||||
/**
|
||||
* Information about the namespace that this service
|
||||
* is registering with. This is assigned after
|
||||
* the first phase of the handshake.
|
||||
*/
|
||||
NamespaceInfo bpNSInfo;
|
||||
|
||||
/**
|
||||
* The registration information for this block pool.
|
||||
* This is assigned after the second phase of the
|
||||
* handshake.
|
||||
*/
|
||||
DatanodeRegistration bpRegistration;
|
||||
|
||||
long lastBlockReport = 0;
|
||||
long lastDeletedReport = 0;
|
||||
|
||||
boolean resetBlockReportTime = true;
|
||||
|
||||
private Thread bpThread;
|
||||
private DatanodeProtocol bpNamenode;
|
||||
private long lastHeartbeat = 0;
|
||||
private volatile boolean initialized = false;
|
||||
private final LinkedList<ReceivedDeletedBlockInfo> receivedAndDeletedBlockList
|
||||
= new LinkedList<ReceivedDeletedBlockInfo>();
|
||||
private volatile int pendingReceivedRequests = 0;
|
||||
private volatile boolean shouldServiceRun = true;
|
||||
UpgradeManagerDatanode upgradeManager = null;
|
||||
private final DataNode dn;
|
||||
private final DNConf dnConf;
|
||||
|
||||
BPOfferService(InetSocketAddress nnAddr, DataNode dn) {
|
||||
this.dn = dn;
|
||||
this.nnAddr = nnAddr;
|
||||
this.dnConf = dn.getDnConf();
|
||||
}
|
||||
|
||||
/**
|
||||
* returns true if BP thread has completed initialization of storage
|
||||
* and has registered with the corresponding namenode
|
||||
* @return true if initialized
|
||||
*/
|
||||
public boolean isInitialized() {
|
||||
return initialized;
|
||||
}
|
||||
|
||||
public boolean isAlive() {
|
||||
return shouldServiceRun && bpThread.isAlive();
|
||||
}
|
||||
|
||||
public String getBlockPoolId() {
|
||||
if (bpNSInfo != null) {
|
||||
return bpNSInfo.getBlockPoolID();
|
||||
} else {
|
||||
LOG.warn("Block pool ID needed, but service not yet registered with NN",
|
||||
new Exception("trace"));
|
||||
return null;
|
||||
}
|
||||
}
|
||||
|
||||
public NamespaceInfo getNamespaceInfo() {
|
||||
return bpNSInfo;
|
||||
}
|
||||
|
||||
public String toString() {
|
||||
if (bpNSInfo == null) {
|
||||
// If we haven't yet connected to our NN, we don't yet know our
|
||||
// own block pool ID.
|
||||
// If _none_ of the block pools have connected yet, we don't even
|
||||
// know the storage ID of this DN.
|
||||
String storageId = dn.getStorageId();
|
||||
if (storageId == null || "".equals(storageId)) {
|
||||
storageId = "unknown";
|
||||
}
|
||||
return "Block pool <registering> (storage id " + storageId +
|
||||
") connecting to " + nnAddr;
|
||||
} else {
|
||||
return "Block pool " + getBlockPoolId() +
|
||||
" (storage id " + dn.getStorageId() +
|
||||
") registered with " + nnAddr;
|
||||
}
|
||||
}
|
||||
|
||||
private InetSocketAddress getNNSocketAddress() {
|
||||
return nnAddr;
|
||||
}
|
||||
|
||||
/**
|
||||
* Used to inject a spy NN in the unit tests.
|
||||
*/
|
||||
@VisibleForTesting
|
||||
void setNameNode(DatanodeProtocol dnProtocol) {
|
||||
bpNamenode = dnProtocol;
|
||||
}
|
||||
|
||||
/**
|
||||
* Perform the first part of the handshake with the NameNode.
|
||||
* This calls <code>versionRequest</code> to determine the NN's
|
||||
* namespace and version info. It automatically retries until
|
||||
* the NN responds or the DN is shutting down.
|
||||
*
|
||||
* @return the NamespaceInfo
|
||||
* @throws IncorrectVersionException if the remote NN does not match
|
||||
* this DN's version
|
||||
*/
|
||||
NamespaceInfo retrieveNamespaceInfo() throws IncorrectVersionException {
|
||||
NamespaceInfo nsInfo = null;
|
||||
while (shouldRun()) {
|
||||
try {
|
||||
nsInfo = bpNamenode.versionRequest();
|
||||
LOG.debug(this + " received versionRequest response: " + nsInfo);
|
||||
break;
|
||||
} catch(SocketTimeoutException e) { // namenode is busy
|
||||
LOG.warn("Problem connecting to server: " + nnAddr);
|
||||
} catch(IOException e ) { // namenode is not available
|
||||
LOG.warn("Problem connecting to server: " + nnAddr);
|
||||
}
|
||||
|
||||
// try again in a second
|
||||
sleepAndLogInterrupts(5000, "requesting version info from NN");
|
||||
}
|
||||
|
||||
if (nsInfo != null) {
|
||||
checkNNVersion(nsInfo);
|
||||
}
|
||||
return nsInfo;
|
||||
}
|
||||
|
||||
private void checkNNVersion(NamespaceInfo nsInfo)
|
||||
throws IncorrectVersionException {
|
||||
// build and layout versions should match
|
||||
String nsBuildVer = nsInfo.getBuildVersion();
|
||||
String stBuildVer = Storage.getBuildVersion();
|
||||
if (!nsBuildVer.equals(stBuildVer)) {
|
||||
LOG.warn("Data-node and name-node Build versions must be the same. " +
|
||||
"Namenode build version: " + nsBuildVer + "Datanode " +
|
||||
"build version: " + stBuildVer);
|
||||
throw new IncorrectVersionException(nsBuildVer, "namenode", stBuildVer);
|
||||
}
|
||||
|
||||
if (HdfsConstants.LAYOUT_VERSION != nsInfo.getLayoutVersion()) {
|
||||
LOG.warn("Data-node and name-node layout versions must be the same." +
|
||||
" Expected: "+ HdfsConstants.LAYOUT_VERSION +
|
||||
" actual "+ bpNSInfo.getLayoutVersion());
|
||||
throw new IncorrectVersionException(
|
||||
bpNSInfo.getLayoutVersion(), "namenode");
|
||||
}
|
||||
}
|
||||
|
||||
private void connectToNNAndHandshake() throws IOException {
|
||||
// get NN proxy
|
||||
bpNamenode = (DatanodeProtocol)RPC.waitForProxy(DatanodeProtocol.class,
|
||||
DatanodeProtocol.versionID, nnAddr, dn.getConf());
|
||||
|
||||
// First phase of the handshake with NN - get the namespace
|
||||
// info.
|
||||
bpNSInfo = retrieveNamespaceInfo();
|
||||
|
||||
// Now that we know the namespace ID, etc, we can pass this to the DN.
|
||||
// The DN can now initialize its local storage if we are the
|
||||
// first BP to handshake, etc.
|
||||
dn.initBlockPool(this);
|
||||
|
||||
// Second phase of the handshake with the NN.
|
||||
register();
|
||||
}
|
||||
|
||||
/**
|
||||
* This methods arranges for the data node to send the block report at
|
||||
* the next heartbeat.
|
||||
*/
|
||||
void scheduleBlockReport(long delay) {
|
||||
if (delay > 0) { // send BR after random delay
|
||||
lastBlockReport = System.currentTimeMillis()
|
||||
- ( dnConf.blockReportInterval - DFSUtil.getRandom().nextInt((int)(delay)));
|
||||
} else { // send at next heartbeat
|
||||
lastBlockReport = lastHeartbeat - dnConf.blockReportInterval;
|
||||
}
|
||||
resetBlockReportTime = true; // reset future BRs for randomness
|
||||
}
|
||||
|
||||
private void reportBadBlocks(ExtendedBlock block) {
|
||||
DatanodeInfo[] dnArr = { new DatanodeInfo(bpRegistration) };
|
||||
LocatedBlock[] blocks = { new LocatedBlock(block, dnArr) };
|
||||
|
||||
try {
|
||||
bpNamenode.reportBadBlocks(blocks);
|
||||
} catch (IOException e){
|
||||
/* One common reason is that NameNode could be in safe mode.
|
||||
* Should we keep on retrying in that case?
|
||||
*/
|
||||
LOG.warn("Failed to report bad block " + block + " to namenode : "
|
||||
+ " Exception", e);
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
/**
|
||||
* Report received blocks and delete hints to the Namenode
|
||||
*
|
||||
* @throws IOException
|
||||
*/
|
||||
private void reportReceivedDeletedBlocks() throws IOException {
|
||||
|
||||
// check if there are newly received blocks
|
||||
ReceivedDeletedBlockInfo[] receivedAndDeletedBlockArray = null;
|
||||
int currentReceivedRequestsCounter;
|
||||
synchronized (receivedAndDeletedBlockList) {
|
||||
currentReceivedRequestsCounter = pendingReceivedRequests;
|
||||
int numBlocks = receivedAndDeletedBlockList.size();
|
||||
if (numBlocks > 0) {
|
||||
//
|
||||
// Send newly-received and deleted blockids to namenode
|
||||
//
|
||||
receivedAndDeletedBlockArray = receivedAndDeletedBlockList
|
||||
.toArray(new ReceivedDeletedBlockInfo[numBlocks]);
|
||||
}
|
||||
}
|
||||
if (receivedAndDeletedBlockArray != null) {
|
||||
bpNamenode.blockReceivedAndDeleted(bpRegistration, getBlockPoolId(),
|
||||
receivedAndDeletedBlockArray);
|
||||
synchronized (receivedAndDeletedBlockList) {
|
||||
for (int i = 0; i < receivedAndDeletedBlockArray.length; i++) {
|
||||
receivedAndDeletedBlockList.remove(receivedAndDeletedBlockArray[i]);
|
||||
}
|
||||
pendingReceivedRequests -= currentReceivedRequestsCounter;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Informing the name node could take a long long time! Should we wait
|
||||
* till namenode is informed before responding with success to the
|
||||
* client? For now we don't.
|
||||
*/
|
||||
void notifyNamenodeReceivedBlock(ExtendedBlock block, String delHint) {
|
||||
if (block == null || delHint == null) {
|
||||
throw new IllegalArgumentException(block == null ? "Block is null"
|
||||
: "delHint is null");
|
||||
}
|
||||
|
||||
if (!block.getBlockPoolId().equals(getBlockPoolId())) {
|
||||
LOG.warn("BlockPool mismatch " + block.getBlockPoolId() + " vs. "
|
||||
+ getBlockPoolId());
|
||||
return;
|
||||
}
|
||||
|
||||
synchronized (receivedAndDeletedBlockList) {
|
||||
receivedAndDeletedBlockList.add(new ReceivedDeletedBlockInfo(block
|
||||
.getLocalBlock(), delHint));
|
||||
pendingReceivedRequests++;
|
||||
receivedAndDeletedBlockList.notifyAll();
|
||||
}
|
||||
}
|
||||
|
||||
void notifyNamenodeDeletedBlock(ExtendedBlock block) {
|
||||
if (block == null) {
|
||||
throw new IllegalArgumentException("Block is null");
|
||||
}
|
||||
|
||||
if (!block.getBlockPoolId().equals(getBlockPoolId())) {
|
||||
LOG.warn("BlockPool mismatch " + block.getBlockPoolId() + " vs. "
|
||||
+ getBlockPoolId());
|
||||
return;
|
||||
}
|
||||
|
||||
synchronized (receivedAndDeletedBlockList) {
|
||||
receivedAndDeletedBlockList.add(new ReceivedDeletedBlockInfo(block
|
||||
.getLocalBlock(), ReceivedDeletedBlockInfo.TODELETE_HINT));
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Report the list blocks to the Namenode
|
||||
* @throws IOException
|
||||
*/
|
||||
DatanodeCommand blockReport() throws IOException {
|
||||
// send block report if timer has expired.
|
||||
DatanodeCommand cmd = null;
|
||||
long startTime = now();
|
||||
if (startTime - lastBlockReport > dnConf.blockReportInterval) {
|
||||
|
||||
// Create block report
|
||||
long brCreateStartTime = now();
|
||||
BlockListAsLongs bReport = dn.data.getBlockReport(getBlockPoolId());
|
||||
|
||||
// Send block report
|
||||
long brSendStartTime = now();
|
||||
cmd = bpNamenode.blockReport(bpRegistration, getBlockPoolId(), bReport
|
||||
.getBlockListAsLongs());
|
||||
|
||||
// Log the block report processing stats from Datanode perspective
|
||||
long brSendCost = now() - brSendStartTime;
|
||||
long brCreateCost = brSendStartTime - brCreateStartTime;
|
||||
dn.metrics.addBlockReport(brSendCost);
|
||||
LOG.info("BlockReport of " + bReport.getNumberOfBlocks()
|
||||
+ " blocks took " + brCreateCost + " msec to generate and "
|
||||
+ brSendCost + " msecs for RPC and NN processing");
|
||||
|
||||
// If we have sent the first block report, then wait a random
|
||||
// time before we start the periodic block reports.
|
||||
if (resetBlockReportTime) {
|
||||
lastBlockReport = startTime - DFSUtil.getRandom().nextInt((int)(dnConf.blockReportInterval));
|
||||
resetBlockReportTime = false;
|
||||
} else {
|
||||
/* say the last block report was at 8:20:14. The current report
|
||||
* should have started around 9:20:14 (default 1 hour interval).
|
||||
* If current time is :
|
||||
* 1) normal like 9:20:18, next report should be at 10:20:14
|
||||
* 2) unexpected like 11:35:43, next report should be at 12:20:14
|
||||
*/
|
||||
lastBlockReport += (now() - lastBlockReport) /
|
||||
dnConf.blockReportInterval * dnConf.blockReportInterval;
|
||||
}
|
||||
LOG.info("sent block report, processed command:" + cmd);
|
||||
}
|
||||
return cmd;
|
||||
}
|
||||
|
||||
|
||||
DatanodeCommand [] sendHeartBeat() throws IOException {
|
||||
return bpNamenode.sendHeartbeat(bpRegistration,
|
||||
dn.data.getCapacity(),
|
||||
dn.data.getDfsUsed(),
|
||||
dn.data.getRemaining(),
|
||||
dn.data.getBlockPoolUsed(getBlockPoolId()),
|
||||
dn.xmitsInProgress.get(),
|
||||
dn.getXceiverCount(), dn.data.getNumFailedVolumes());
|
||||
}
|
||||
|
||||
//This must be called only by blockPoolManager
|
||||
void start() {
|
||||
if ((bpThread != null) && (bpThread.isAlive())) {
|
||||
//Thread is started already
|
||||
return;
|
||||
}
|
||||
bpThread = new Thread(this, dnThreadName);
|
||||
bpThread.setDaemon(true); // needed for JUnit testing
|
||||
bpThread.start();
|
||||
}
|
||||
|
||||
//This must be called only by blockPoolManager.
|
||||
void stop() {
|
||||
shouldServiceRun = false;
|
||||
if (bpThread != null) {
|
||||
bpThread.interrupt();
|
||||
}
|
||||
}
|
||||
|
||||
//This must be called only by blockPoolManager
|
||||
void join() {
|
||||
try {
|
||||
if (bpThread != null) {
|
||||
bpThread.join();
|
||||
}
|
||||
} catch (InterruptedException ie) { }
|
||||
}
|
||||
|
||||
//Cleanup method to be called by current thread before exiting.
|
||||
private synchronized void cleanUp() {
|
||||
|
||||
if(upgradeManager != null)
|
||||
upgradeManager.shutdownUpgrade();
|
||||
shouldServiceRun = false;
|
||||
RPC.stopProxy(bpNamenode);
|
||||
dn.shutdownBlockPool(this);
|
||||
}
|
||||
|
||||
/**
|
||||
* Main loop for each BP thread. Run until shutdown,
|
||||
* forever calling remote NameNode functions.
|
||||
*/
|
||||
private void offerService() throws Exception {
|
||||
LOG.info("For namenode " + nnAddr + " using DELETEREPORT_INTERVAL of "
|
||||
+ dnConf.deleteReportInterval + " msec " + " BLOCKREPORT_INTERVAL of "
|
||||
+ dnConf.blockReportInterval + "msec" + " Initial delay: "
|
||||
+ dnConf.initialBlockReportDelay + "msec" + "; heartBeatInterval="
|
||||
+ dnConf.heartBeatInterval);
|
||||
|
||||
//
|
||||
// Now loop for a long time....
|
||||
//
|
||||
while (shouldRun()) {
|
||||
try {
|
||||
long startTime = now();
|
||||
|
||||
//
|
||||
// Every so often, send heartbeat or block-report
|
||||
//
|
||||
if (startTime - lastHeartbeat > dnConf.heartBeatInterval) {
|
||||
//
|
||||
// All heartbeat messages include following info:
|
||||
// -- Datanode name
|
||||
// -- data transfer port
|
||||
// -- Total capacity
|
||||
// -- Bytes remaining
|
||||
//
|
||||
lastHeartbeat = startTime;
|
||||
if (!dn.heartbeatsDisabledForTests) {
|
||||
DatanodeCommand[] cmds = sendHeartBeat();
|
||||
dn.metrics.addHeartbeat(now() - startTime);
|
||||
|
||||
long startProcessCommands = now();
|
||||
if (!processCommand(cmds))
|
||||
continue;
|
||||
long endProcessCommands = now();
|
||||
if (endProcessCommands - startProcessCommands > 2000) {
|
||||
LOG.info("Took " + (endProcessCommands - startProcessCommands) +
|
||||
"ms to process " + cmds.length + " commands from NN");
|
||||
}
|
||||
}
|
||||
}
|
||||
if (pendingReceivedRequests > 0
|
||||
|| (startTime - lastDeletedReport > dnConf.deleteReportInterval)) {
|
||||
reportReceivedDeletedBlocks();
|
||||
lastDeletedReport = startTime;
|
||||
}
|
||||
|
||||
DatanodeCommand cmd = blockReport();
|
||||
processCommand(cmd);
|
||||
|
||||
// Now safe to start scanning the block pool
|
||||
if (dn.blockScanner != null) {
|
||||
dn.blockScanner.addBlockPool(this.getBlockPoolId());
|
||||
}
|
||||
|
||||
//
|
||||
// There is no work to do; sleep until hearbeat timer elapses,
|
||||
// or work arrives, and then iterate again.
|
||||
//
|
||||
long waitTime = dnConf.heartBeatInterval -
|
||||
(System.currentTimeMillis() - lastHeartbeat);
|
||||
synchronized(receivedAndDeletedBlockList) {
|
||||
if (waitTime > 0 && pendingReceivedRequests == 0) {
|
||||
try {
|
||||
receivedAndDeletedBlockList.wait(waitTime);
|
||||
} catch (InterruptedException ie) {
|
||||
LOG.warn("BPOfferService for " + this + " interrupted");
|
||||
}
|
||||
}
|
||||
} // synchronized
|
||||
} catch(RemoteException re) {
|
||||
String reClass = re.getClassName();
|
||||
if (UnregisteredNodeException.class.getName().equals(reClass) ||
|
||||
DisallowedDatanodeException.class.getName().equals(reClass) ||
|
||||
IncorrectVersionException.class.getName().equals(reClass)) {
|
||||
LOG.warn(this + " is shutting down", re);
|
||||
shouldServiceRun = false;
|
||||
return;
|
||||
}
|
||||
LOG.warn("RemoteException in offerService", re);
|
||||
try {
|
||||
long sleepTime = Math.min(1000, dnConf.heartBeatInterval);
|
||||
Thread.sleep(sleepTime);
|
||||
} catch (InterruptedException ie) {
|
||||
Thread.currentThread().interrupt();
|
||||
}
|
||||
} catch (IOException e) {
|
||||
LOG.warn("IOException in offerService", e);
|
||||
}
|
||||
} // while (shouldRun())
|
||||
} // offerService
|
||||
|
||||
/**
|
||||
* Register one bp with the corresponding NameNode
|
||||
* <p>
|
||||
* The bpDatanode needs to register with the namenode on startup in order
|
||||
* 1) to report which storage it is serving now and
|
||||
* 2) to receive a registrationID
|
||||
*
|
||||
* issued by the namenode to recognize registered datanodes.
|
||||
*
|
||||
* @see FSNamesystem#registerDatanode(DatanodeRegistration)
|
||||
* @throws IOException
|
||||
*/
|
||||
void register() throws IOException {
|
||||
Preconditions.checkState(bpNSInfo != null,
|
||||
"register() should be called after handshake()");
|
||||
|
||||
// The handshake() phase loaded the block pool storage
|
||||
// off disk - so update the bpRegistration object from that info
|
||||
bpRegistration = dn.createBPRegistration(bpNSInfo);
|
||||
|
||||
LOG.info(this + " beginning handshake with NN");
|
||||
|
||||
while (shouldRun()) {
|
||||
try {
|
||||
// Use returned registration from namenode with updated machine name.
|
||||
bpRegistration = bpNamenode.registerDatanode(bpRegistration);
|
||||
break;
|
||||
} catch(SocketTimeoutException e) { // namenode is busy
|
||||
LOG.info("Problem connecting to server: " + nnAddr);
|
||||
sleepAndLogInterrupts(1000, "connecting to server");
|
||||
}
|
||||
}
|
||||
|
||||
LOG.info("Block pool " + this + " successfully registered with NN");
|
||||
dn.bpRegistrationSucceeded(bpRegistration, getBlockPoolId());
|
||||
|
||||
// random short delay - helps scatter the BR from all DNs
|
||||
scheduleBlockReport(dnConf.initialBlockReportDelay);
|
||||
}
|
||||
|
||||
|
||||
private void sleepAndLogInterrupts(int millis,
|
||||
String stateString) {
|
||||
try {
|
||||
Thread.sleep(millis);
|
||||
} catch (InterruptedException ie) {
|
||||
LOG.info("BPOfferService " + this +
|
||||
" interrupted while " + stateString);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* No matter what kind of exception we get, keep retrying to offerService().
|
||||
* That's the loop that connects to the NameNode and provides basic DataNode
|
||||
* functionality.
|
||||
*
|
||||
* Only stop when "shouldRun" or "shouldServiceRun" is turned off, which can
|
||||
* happen either at shutdown or due to refreshNamenodes.
|
||||
*/
|
||||
@Override
|
||||
public void run() {
|
||||
LOG.info(this + " starting to offer service");
|
||||
|
||||
try {
|
||||
// init stuff
|
||||
try {
|
||||
// setup storage
|
||||
connectToNNAndHandshake();
|
||||
} catch (IOException ioe) {
|
||||
// Initial handshake, storage recovery or registration failed
|
||||
// End BPOfferService thread
|
||||
LOG.fatal("Initialization failed for block pool " + this, ioe);
|
||||
return;
|
||||
}
|
||||
|
||||
initialized = true; // bp is initialized;
|
||||
|
||||
while (shouldRun()) {
|
||||
try {
|
||||
startDistributedUpgradeIfNeeded();
|
||||
offerService();
|
||||
} catch (Exception ex) {
|
||||
LOG.error("Exception in BPOfferService for " + this, ex);
|
||||
sleepAndLogInterrupts(5000, "offering service");
|
||||
}
|
||||
}
|
||||
} catch (Throwable ex) {
|
||||
LOG.warn("Unexpected exception in block pool " + this, ex);
|
||||
} finally {
|
||||
LOG.warn("Ending block pool service for: " + this);
|
||||
cleanUp();
|
||||
}
|
||||
}
|
||||
|
||||
private boolean shouldRun() {
|
||||
return shouldServiceRun && dn.shouldRun();
|
||||
}
|
||||
|
||||
/**
|
||||
* Process an array of datanode commands
|
||||
*
|
||||
* @param cmds an array of datanode commands
|
||||
* @return true if further processing may be required or false otherwise.
|
||||
*/
|
||||
private boolean processCommand(DatanodeCommand[] cmds) {
|
||||
if (cmds != null) {
|
||||
for (DatanodeCommand cmd : cmds) {
|
||||
try {
|
||||
if (processCommand(cmd) == false) {
|
||||
return false;
|
||||
}
|
||||
} catch (IOException ioe) {
|
||||
LOG.warn("Error processing datanode Command", ioe);
|
||||
}
|
||||
}
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
/**
|
||||
*
|
||||
* @param cmd
|
||||
* @return true if further processing may be required or false otherwise.
|
||||
* @throws IOException
|
||||
*/
|
||||
private boolean processCommand(DatanodeCommand cmd) throws IOException {
|
||||
if (cmd == null)
|
||||
return true;
|
||||
final BlockCommand bcmd =
|
||||
cmd instanceof BlockCommand? (BlockCommand)cmd: null;
|
||||
|
||||
switch(cmd.getAction()) {
|
||||
case DatanodeProtocol.DNA_TRANSFER:
|
||||
// Send a copy of a block to another datanode
|
||||
dn.transferBlocks(bcmd.getBlockPoolId(), bcmd.getBlocks(), bcmd.getTargets());
|
||||
dn.metrics.incrBlocksReplicated(bcmd.getBlocks().length);
|
||||
break;
|
||||
case DatanodeProtocol.DNA_INVALIDATE:
|
||||
//
|
||||
// Some local block(s) are obsolete and can be
|
||||
// safely garbage-collected.
|
||||
//
|
||||
Block toDelete[] = bcmd.getBlocks();
|
||||
try {
|
||||
if (dn.blockScanner != null) {
|
||||
dn.blockScanner.deleteBlocks(bcmd.getBlockPoolId(), toDelete);
|
||||
}
|
||||
// using global fsdataset
|
||||
dn.data.invalidate(bcmd.getBlockPoolId(), toDelete);
|
||||
} catch(IOException e) {
|
||||
dn.checkDiskError();
|
||||
throw e;
|
||||
}
|
||||
dn.metrics.incrBlocksRemoved(toDelete.length);
|
||||
break;
|
||||
case DatanodeProtocol.DNA_SHUTDOWN:
|
||||
// shut down the data node
|
||||
shouldServiceRun = false;
|
||||
return false;
|
||||
case DatanodeProtocol.DNA_REGISTER:
|
||||
// namenode requested a registration - at start or if NN lost contact
|
||||
LOG.info("DatanodeCommand action: DNA_REGISTER");
|
||||
if (shouldRun()) {
|
||||
// re-retrieve namespace info to make sure that, if the NN
|
||||
// was restarted, we still match its version (HDFS-2120)
|
||||
retrieveNamespaceInfo();
|
||||
// and re-register
|
||||
register();
|
||||
}
|
||||
break;
|
||||
case DatanodeProtocol.DNA_FINALIZE:
|
||||
dn.storage.finalizeUpgrade(((FinalizeCommand) cmd)
|
||||
.getBlockPoolId());
|
||||
break;
|
||||
case UpgradeCommand.UC_ACTION_START_UPGRADE:
|
||||
// start distributed upgrade here
|
||||
processDistributedUpgradeCommand((UpgradeCommand)cmd);
|
||||
break;
|
||||
case DatanodeProtocol.DNA_RECOVERBLOCK:
|
||||
dn.recoverBlocks(((BlockRecoveryCommand)cmd).getRecoveringBlocks());
|
||||
break;
|
||||
case DatanodeProtocol.DNA_ACCESSKEYUPDATE:
|
||||
LOG.info("DatanodeCommand action: DNA_ACCESSKEYUPDATE");
|
||||
if (dn.isBlockTokenEnabled) {
|
||||
dn.blockPoolTokenSecretManager.setKeys(getBlockPoolId(),
|
||||
((KeyUpdateCommand) cmd).getExportedKeys());
|
||||
}
|
||||
break;
|
||||
case DatanodeProtocol.DNA_BALANCERBANDWIDTHUPDATE:
|
||||
LOG.info("DatanodeCommand action: DNA_BALANCERBANDWIDTHUPDATE");
|
||||
long bandwidth =
|
||||
((BalancerBandwidthCommand) cmd).getBalancerBandwidthValue();
|
||||
if (bandwidth > 0) {
|
||||
DataXceiverServer dxcs =
|
||||
(DataXceiverServer) dn.dataXceiverServer.getRunnable();
|
||||
dxcs.balanceThrottler.setBandwidth(bandwidth);
|
||||
}
|
||||
break;
|
||||
default:
|
||||
LOG.warn("Unknown DatanodeCommand action: " + cmd.getAction());
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
private void processDistributedUpgradeCommand(UpgradeCommand comm)
|
||||
throws IOException {
|
||||
UpgradeManagerDatanode upgradeManager = getUpgradeManager();
|
||||
upgradeManager.processUpgradeCommand(comm);
|
||||
}
|
||||
|
||||
synchronized UpgradeManagerDatanode getUpgradeManager() {
|
||||
if(upgradeManager == null)
|
||||
upgradeManager =
|
||||
new UpgradeManagerDatanode(dn, getBlockPoolId());
|
||||
|
||||
return upgradeManager;
|
||||
}
|
||||
|
||||
/**
|
||||
* Start distributed upgrade if it should be initiated by the data-node.
|
||||
*/
|
||||
private void startDistributedUpgradeIfNeeded() throws IOException {
|
||||
UpgradeManagerDatanode um = getUpgradeManager();
|
||||
|
||||
if(!um.getUpgradeState())
|
||||
return;
|
||||
um.setUpgradeState(false, um.getUpgradeVersion());
|
||||
um.startUpgrade();
|
||||
return;
|
||||
}
|
||||
|
||||
boolean areHeartbeatsDisabledForTests() {
|
||||
return this.heartbeatsDisabledForTests;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* This method starts the data node with the specified conf.
|
||||
*
|
||||
@ -1468,7 +742,7 @@ DatanodeRegistration createBPRegistration(NamespaceInfo nsInfo) {
|
||||
* sets the storage ID based on this registration.
|
||||
* Also updates the block pool's state in the secret manager.
|
||||
*/
|
||||
private synchronized void bpRegistrationSucceeded(DatanodeRegistration bpRegistration,
|
||||
synchronized void bpRegistrationSucceeded(DatanodeRegistration bpRegistration,
|
||||
String blockPoolId)
|
||||
throws IOException {
|
||||
hostName = bpRegistration.getHost();
|
||||
@ -1525,7 +799,7 @@ private void registerBlockPoolWithSecretManager(DatanodeRegistration bpRegistrat
|
||||
/**
|
||||
* Remove the given block pool from the block scanner, dataset, and storage.
|
||||
*/
|
||||
private void shutdownBlockPool(BPOfferService bpos) {
|
||||
void shutdownBlockPool(BPOfferService bpos) {
|
||||
blockPoolManager.remove(bpos);
|
||||
|
||||
String bpId = bpos.getBlockPoolId();
|
||||
@ -1998,7 +1272,7 @@ private void transferBlock( ExtendedBlock block,
|
||||
}
|
||||
}
|
||||
|
||||
private void transferBlocks(String poolId, Block blocks[],
|
||||
void transferBlocks(String poolId, Block blocks[],
|
||||
DatanodeInfo xferTargets[][]) {
|
||||
for (int i = 0; i < blocks.length; i++) {
|
||||
try {
|
||||
@ -2290,9 +1564,7 @@ public static DataNode instantiateDataNode(String args [], Configuration conf,
|
||||
System.exit(-1);
|
||||
}
|
||||
Collection<URI> dataDirs = getStorageDirs(conf);
|
||||
dnThreadName = "DataNode: [" +
|
||||
StringUtils.uriToString(dataDirs.toArray(new URI[0])) + "]";
|
||||
UserGroupInformation.setConfiguration(conf);
|
||||
UserGroupInformation.setConfiguration(conf);
|
||||
SecurityUtil.login(conf, DFS_DATANODE_KEYTAB_FILE_KEY,
|
||||
DFS_DATANODE_USER_NAME_KEY);
|
||||
return makeInstance(dataDirs, conf, resources);
|
||||
@ -2824,6 +2096,14 @@ void transferReplicaForPipelineRecovery(final ExtendedBlock b,
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Finalize a pending upgrade in response to DNA_FINALIZE.
|
||||
* @param blockPoolId the block pool to finalize
|
||||
*/
|
||||
void finalizeUpgradeForPool(String blockPoolId) throws IOException {
|
||||
storage.finalizeUpgrade(blockPoolId);
|
||||
}
|
||||
|
||||
// Determine a Datanode's streaming address
|
||||
public static InetSocketAddress getStreamingAddr(Configuration conf) {
|
||||
return NetUtils.createSocketAddr(
|
||||
@ -2973,4 +2253,5 @@ DNConf getDnConf() {
|
||||
boolean shouldRun() {
|
||||
return shouldRun;
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
@ -21,8 +21,6 @@
|
||||
|
||||
import java.io.IOException;
|
||||
|
||||
import junit.framework.TestCase;
|
||||
|
||||
import org.apache.commons.logging.Log;
|
||||
import org.apache.commons.logging.LogFactory;
|
||||
import org.apache.hadoop.conf.Configuration;
|
||||
@ -38,9 +36,12 @@
|
||||
import org.apache.hadoop.hdfs.tools.DFSAdmin;
|
||||
import org.apache.hadoop.test.GenericTestUtils;
|
||||
|
||||
import org.junit.Test;
|
||||
import static org.junit.Assert.*;
|
||||
|
||||
/**
|
||||
*/
|
||||
public class TestDistributedUpgrade extends TestCase {
|
||||
public class TestDistributedUpgrade {
|
||||
private static final Log LOG = LogFactory.getLog(TestDistributedUpgrade.class);
|
||||
private Configuration conf;
|
||||
private int testCounter = 0;
|
||||
@ -95,6 +96,7 @@ void startDataNodeShouldFail(StartupOption operation) {
|
||||
|
||||
/**
|
||||
*/
|
||||
@Test(timeout=120000)
|
||||
public void testDistributedUpgrade() throws Exception {
|
||||
int numDirs = 1;
|
||||
TestDFSUpgradeFromImage testImg = new TestDFSUpgradeFromImage();
|
||||
|
||||
@ -28,7 +28,6 @@
|
||||
import org.apache.hadoop.hdfs.DFSConfigKeys;
|
||||
import org.apache.hadoop.hdfs.HdfsConfiguration;
|
||||
import org.apache.hadoop.hdfs.MiniDFSCluster;
|
||||
import org.apache.hadoop.hdfs.server.datanode.DataNode.BPOfferService;
|
||||
import org.junit.After;
|
||||
import org.junit.Before;
|
||||
import org.junit.Test;
|
||||
|
||||
@ -31,7 +31,6 @@
|
||||
import org.apache.hadoop.hdfs.HdfsConfiguration;
|
||||
import org.apache.hadoop.hdfs.MiniDFSCluster;
|
||||
import org.apache.hadoop.hdfs.server.common.HdfsServerConstants.StartupOption;
|
||||
import org.apache.hadoop.hdfs.server.datanode.DataNode.BPOfferService;
|
||||
import org.apache.hadoop.hdfs.server.datanode.FSDataset.VolumeInfo;
|
||||
import org.apache.hadoop.hdfs.server.namenode.FSImageTestUtil;
|
||||
import org.apache.hadoop.hdfs.server.namenode.NameNode;
|
||||
|
||||
@ -24,7 +24,6 @@
|
||||
import org.apache.commons.logging.Log;
|
||||
import org.apache.commons.logging.LogFactory;
|
||||
import org.apache.hadoop.hdfs.server.common.IncorrectVersionException;
|
||||
import org.apache.hadoop.hdfs.server.datanode.DataNode.BPOfferService;
|
||||
import org.apache.hadoop.hdfs.server.protocol.DatanodeProtocol;
|
||||
import org.apache.hadoop.hdfs.server.protocol.NamespaceInfo;
|
||||
import org.junit.Test;
|
||||
@ -43,7 +42,7 @@ public void testDataNodeRegister() throws Exception {
|
||||
DataNode mockDN = mock(DataNode.class);
|
||||
Mockito.doReturn(true).when(mockDN).shouldRun();
|
||||
|
||||
BPOfferService bpos = new DataNode.BPOfferService(INVALID_ADDR, mockDN);
|
||||
BPOfferService bpos = new BPOfferService(INVALID_ADDR, mockDN);
|
||||
|
||||
NamespaceInfo fakeNSInfo = mock(NamespaceInfo.class);
|
||||
when(fakeNSInfo.getBuildVersion()).thenReturn("NSBuildVersion");
|
||||
|
||||
@ -26,7 +26,6 @@
|
||||
import org.apache.hadoop.conf.Configuration;
|
||||
import org.apache.hadoop.hdfs.DFSConfigKeys;
|
||||
import org.apache.hadoop.hdfs.MiniDFSCluster;
|
||||
import org.apache.hadoop.hdfs.server.datanode.DataNode.BPOfferService;
|
||||
import org.junit.Test;
|
||||
|
||||
/**
|
||||
|
||||
Loading…
Reference in New Issue
Block a user