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HDFS-12299. Race Between update pipeline and DN Re-Registration. Contributed by Brahma Reddy Battula.

This commit is contained in:
Kihwal Lee 2017-08-25 14:53:53 -05:00
parent 2cae387402
commit 5a83ffa396
3 changed files with 53 additions and 2 deletions
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3
hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/DataStreamer.java
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@ -1579,7 +1579,8 @@ class DataStreamer extends Daemon {
}
/** update pipeline at the namenode */
private void updatePipeline(long newGS) throws IOException {
@VisibleForTesting
void updatePipeline(long newGS) throws IOException {
final ExtendedBlock oldBlock = block.getCurrentBlock();
// the new GS has been propagated to all DN, it should be ok to update the
// local block state

2
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockUnderConstructionFeature.java
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@ -84,7 +84,7 @@ public class BlockUnderConstructionFeature {
for(int i = 0; i < targets.length; i++) {
// Only store non-null DatanodeStorageInfo.
if (targets[i] != null) {
replicas[i] = new ReplicaUnderConstruction(block,
replicas[offset++] = new ReplicaUnderConstruction(block,
targets[i], ReplicaState.RBW);
}
}

50
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestClientProtocolForPipelineRecovery.java
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@ -38,6 +38,9 @@ import org.apache.hadoop.hdfs.client.HdfsClientConfigKeys;
import org.apache.hadoop.hdfs.client.HdfsClientConfigKeys.BlockWrite;
import org.apache.hadoop.hdfs.protocol.DatanodeInfo;
import org.apache.hadoop.hdfs.protocol.ExtendedBlock;
import org.apache.hadoop.hdfs.protocol.LocatedBlock;
import org.apache.hadoop.hdfs.protocolPB.DatanodeProtocolClientSideTranslatorPB;
import org.apache.hadoop.hdfs.server.blockmanagement.DatanodeDescriptor;
import org.apache.hadoop.hdfs.server.common.HdfsServerConstants.BlockUCState;
import org.apache.hadoop.hdfs.server.datanode.DataNode;
import org.apache.hadoop.hdfs.server.datanode.DataNodeFaultInjector;
@ -706,4 +709,51 @@ public class TestClientProtocolForPipelineRecovery {
cluster.shutdown();
}
}
@Test
public void testUpdatePipeLineAfterDNReg()throws Exception {
Configuration conf = new HdfsConfiguration();
MiniDFSCluster cluster = null;
try {
cluster = new MiniDFSCluster.Builder(conf).numDataNodes(2).build();
cluster.waitActive();
FileSystem fileSys = cluster.getFileSystem();
Path file = new Path("/testUpdatePipeLineAfterDNReg");
FSDataOutputStream out = fileSys.create(file);
out.write(1);
out.hflush();
//Get the First DN and disable the heartbeats and then put in Deadstate
DFSOutputStream dfsOut = (DFSOutputStream) out.getWrappedStream();
DatanodeInfo[] pipeline = dfsOut.getPipeline();
DataNode dn1 = cluster.getDataNode(pipeline[0].getIpcPort());
dn1.setHeartbeatsDisabledForTests(true);
DatanodeDescriptor dn1Desc = cluster.getNamesystem(0).getBlockManager()
.getDatanodeManager().getDatanode(dn1.getDatanodeId());
cluster.setDataNodeDead(dn1Desc);
//Re-register the DeadNode
DatanodeProtocolClientSideTranslatorPB dnp =
new DatanodeProtocolClientSideTranslatorPB(
cluster.getNameNode().getNameNodeAddress(), conf);
dnp.registerDatanode(
dn1.getDNRegistrationForBP(cluster.getNamesystem().getBlockPoolId()));
DFSOutputStream dfsO = (DFSOutputStream) out.getWrappedStream();
String clientName = ((DistributedFileSystem) fileSys).getClient()
.getClientName();
NamenodeProtocols namenode = cluster.getNameNodeRpc();
//Update the genstamp and call updatepipeline
LocatedBlock newBlock = namenode
.updateBlockForPipeline(dfsO.getBlock(), clientName);
dfsO.getStreamer()
.updatePipeline(newBlock.getBlock().getGenerationStamp());
newBlock = namenode.updateBlockForPipeline(dfsO.getBlock(), clientName);
//Should not throw any error Pipeline should be success
dfsO.getStreamer()
.updatePipeline(newBlock.getBlock().getGenerationStamp());
} finally {
if (cluster != null) {
cluster.shutdown();
}
}
}
}