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HDFS-12914. Block report leases cause missing blocks until next report. Contributed by Santosh Marella, He Xiaoqiao.

Browse Source 
Signed-off-by: Wei-Chiu Chuang <weichiu@apache.org>
Co-authored-by: He Xiaoqiao <hexiaoqiao@apache.org>
This commit is contained in:
Santosh Marella 2019-06-14 10:35:33 -07:00 committed by Wei-Chiu Chuang
parent 7314185c4a
commit 6822193ee6
3 changed files with 193 additions and 21 deletions
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21
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockManager.java
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@ -2572,6 +2572,21 @@ private static class BlockInfoToAdd {
}
}
/**
* Check block report lease.
* @return true if lease exist and not expire
*/
public boolean checkBlockReportLease(BlockReportContext context,
final DatanodeID nodeID) throws UnregisteredNodeException {
if (context == null) {
return true;
}
DatanodeDescriptor node = datanodeManager.getDatanode(nodeID);
final long startTime = Time.monotonicNow();
return blockReportLeaseManager.checkLease(node, startTime,
context.getLeaseId());
}
/**
* The given storage is reporting all its blocks.
* Update the (storage{@literal -->}block list) and
@ -2619,12 +2634,6 @@ public boolean processReport(final DatanodeID nodeID,
blockReportLeaseManager.removeLease(node);
return !node.hasStaleStorages();
}
if (context != null) {
if (!blockReportLeaseManager.checkLease(node, startTime,
context.getLeaseId())) {
return false;
}
}
if (storageInfo.getBlockReportCount() == 0) {
// The first block report can be processed a lot more efficiently than

34
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NameNodeRpcServer.java
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@ -45,7 +45,6 @@
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.Callable;
import com.google.common.collect.Lists;
@ -175,6 +174,7 @@
import org.apache.hadoop.hdfs.server.protocol.NamenodeRegistration;
import org.apache.hadoop.hdfs.server.protocol.NamespaceInfo;
import org.apache.hadoop.hdfs.server.protocol.NodeRegistration;
import org.apache.hadoop.hdfs.server.protocol.RegisterCommand;
import org.apache.hadoop.hdfs.server.protocol.RemoteEditLogManifest;
import org.apache.hadoop.hdfs.server.protocol.SlowDiskReports;
import org.apache.hadoop.hdfs.server.protocol.SlowPeerReports;
@ -1591,21 +1591,25 @@ public DatanodeCommand blockReport(final DatanodeRegistration nodeReg,
}
final BlockManager bm = namesystem.getBlockManager();
boolean noStaleStorages = false;
for (int r = 0; r < reports.length; r++) {
final BlockListAsLongs blocks = reports[r].getBlocks();
//
// BlockManager.processReport accumulates information of prior calls
// for the same node and storage, so the value returned by the last
// call of this loop is the final updated value for noStaleStorage.
//
final int index = r;
noStaleStorages = bm.runBlockOp(new Callable<Boolean>() {
@Override
public Boolean call() throws IOException {
return bm.processReport(nodeReg, reports[index].getStorage(),
blocks, context);
try {
if (bm.checkBlockReportLease(context, nodeReg)) {
for (int r = 0; r < reports.length; r++) {
final BlockListAsLongs blocks = reports[r].getBlocks();
//
// BlockManager.processReport accumulates information of prior calls
// for the same node and storage, so the value returned by the last
// call of this loop is the final updated value for noStaleStorage.
//
final int index = r;
noStaleStorages = bm.runBlockOp(() ->
bm.processReport(nodeReg, reports[index].getStorage(),
blocks, context));
}
});
}
} catch (UnregisteredNodeException une) {
LOG.debug("Datanode {} is attempting to report but not register yet.",
nodeReg);
return RegisterCommand.REGISTER;
}
bm.removeBRLeaseIfNeeded(nodeReg, context);

159
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/TestBlockReportLease.java Normal file
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@ -0,0 +1,159 @@
/**
* 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.blockmanagement;
import org.apache.hadoop.hdfs.HdfsConfiguration;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.hdfs.protocol.BlockListAsLongs;
import org.apache.hadoop.hdfs.server.datanode.DataNode;
import org.apache.hadoop.hdfs.server.namenode.FSNamesystem;
import org.apache.hadoop.hdfs.server.protocol.BlockReportContext;
import org.apache.hadoop.hdfs.server.protocol.DatanodeCommand;
import org.apache.hadoop.hdfs.server.protocol.DatanodeRegistration;
import org.apache.hadoop.hdfs.server.protocol.DatanodeStorage;
import org.apache.hadoop.hdfs.server.protocol.FinalizeCommand;
import org.apache.hadoop.hdfs.server.protocol.HeartbeatResponse;
import org.apache.hadoop.hdfs.server.protocol.NamenodeProtocols;
import org.apache.hadoop.hdfs.server.protocol.SlowDiskReports;
import org.apache.hadoop.hdfs.server.protocol.SlowPeerReports;
import org.apache.hadoop.hdfs.server.protocol.StorageBlockReport;
import org.apache.hadoop.hdfs.server.protocol.StorageReport;
import org.apache.hadoop.test.GenericTestUtils.DelayAnswer;
import org.junit.Test;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.Mockito.doAnswer;
import static org.mockito.Mockito.spy;
/**
* Tests that BlockReportLease in BlockManager.
*/
public class TestBlockReportLease {
/**
* Test check lease about one BlockReport with many StorageBlockReport.
* Before HDFS-12914, when batch storage report to NameNode, it will check
* less for one storage by one, So it could part storage report can
* be process normally, however, the rest storage report can not be process
* since check lease failed.
* After HDFS-12914, NameNode check lease once for every blockreport request,
* So this issue will not exist anymore.
*/
@Test
public void testCheckBlockReportLease() throws Exception {
HdfsConfiguration conf = new HdfsConfiguration();
Random rand = new Random();
try (MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf)
.numDataNodes(1).build()) {
cluster.waitActive();
FSNamesystem fsn = cluster.getNamesystem();
BlockManager blockManager = fsn.getBlockManager();
BlockManager spyBlockManager = spy(blockManager);
fsn.setBlockManagerForTesting(spyBlockManager);
String poolId = cluster.getNamesystem().getBlockPoolId();
NamenodeProtocols rpcServer = cluster.getNameNodeRpc();
// Test based on one DataNode report to Namenode
DataNode dn = cluster.getDataNodes().get(0);
DatanodeDescriptor datanodeDescriptor = spyBlockManager
.getDatanodeManager().getDatanode(dn.getDatanodeId());
DatanodeRegistration dnRegistration = dn.getDNRegistrationForBP(poolId);
StorageReport[] storages = dn.getFSDataset().getStorageReports(poolId);
// Send heartbeat and request full block report lease
HeartbeatResponse hbResponse = rpcServer.sendHeartbeat(
dnRegistration, storages, 0, 0, 0, 0, 0, null, true,
SlowPeerReports.EMPTY_REPORT, SlowDiskReports.EMPTY_REPORT);
DelayAnswer delayer = new DelayAnswer(BlockManager.LOG);
doAnswer(delayer).when(spyBlockManager).processReport(
any(DatanodeStorageInfo.class),
any(BlockListAsLongs.class),
any(BlockReportContext.class));
ExecutorService pool = Executors.newFixedThreadPool(1);
// Trigger sendBlockReport
BlockReportContext brContext = new BlockReportContext(1, 0,
rand.nextLong(), hbResponse.getFullBlockReportLeaseId(), true);
Future<DatanodeCommand> sendBRfuturea = pool.submit(() -> {
// Build every storage with 100 blocks for sending report
DatanodeStorage[] datanodeStorages
= new DatanodeStorage[storages.length];
for (int i = 0; i < storages.length; i++) {
datanodeStorages[i] = storages[i].getStorage();
}
StorageBlockReport[] reports = createReports(datanodeStorages, 100);
// Send blockReport
return rpcServer.blockReport(dnRegistration, poolId, reports,
brContext);
});
// Wait until BlockManager calls processReport
delayer.waitForCall();
// Remove full block report lease about dn
spyBlockManager.getBlockReportLeaseManager()
.removeLease(datanodeDescriptor);
// Allow blockreport to proceed
delayer.proceed();
// Get result, it will not null if process successfully
DatanodeCommand datanodeCommand = sendBRfuturea.get();
assertTrue(datanodeCommand instanceof FinalizeCommand);
assertEquals(poolId, ((FinalizeCommand)datanodeCommand)
.getBlockPoolId());
}
}
private StorageBlockReport[] createReports(DatanodeStorage[] dnStorages,
int numBlocks) {
int longsPerBlock = 3;
int blockListSize = 2 + numBlocks * longsPerBlock;
int numStorages = dnStorages.length;
StorageBlockReport[] storageBlockReports
= new StorageBlockReport[numStorages];
for (int i = 0; i < numStorages; i++) {
List<Long> longs = new ArrayList<Long>(blockListSize);
longs.add(Long.valueOf(numBlocks));
longs.add(0L);
for (int j = 0; j < blockListSize; ++j) {
longs.add(Long.valueOf(j));
}
BlockListAsLongs blockList = BlockListAsLongs.decodeLongs(longs);
storageBlockReports[i] = new StorageBlockReport(dnStorages[i], blockList);
}
return storageBlockReports;
}
}