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https://issues.apache.org/jira/browse/HDFS-11852?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kihwal Lee resolved HDFS-11852.
-------------------------------
Resolution: Duplicate
> Under-repicated block never completes because of failure in
> commitBlockSynchronization()
> ----------------------------------------------------------------------------------------
>
> Key: HDFS-11852
> URL: https://issues.apache.org/jira/browse/HDFS-11852
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 2.7.3
> Reporter: Ravi Prakash
>
> Credit goes to Charles Wimmer and Karthik Kumar for pointing me to this issue.
> We noticed a block is holding up decommissioning because recovery failed.
> (The stack trace below is from the time when the cluster was 2.7.2) . DN2 and
> DN3 are no longer part of the cluster. DN1 is the node held up for
> decomissioning. I checked that the block and meta file indeed are in the
> finalized directory.
> {code}2016-09-19 09:02:25,837 WARN
> org.apache.hadoop.hdfs.server.datanode.DataNode: recoverBlocks FAILED:
> RecoveringBlock{BP-<someid>:blk_1094097355_20357090; getBlockSize()=0;
> corrupt=false; offset=-1;
> locs=[DatanodeInfoWithStorage[<DN1>:50010,null,null],
> DatanodeInfoWithStorage[<DN2>:50010,null,null],
> DatanodeInfoWithStorage[<DN3>:50010,null,null]]}
> org.apache.hadoop.ipc.RemoteException(java.lang.IllegalStateException):
> Failed to finalize INodeFile <filename> since blocks[0] is non-complete,
> where blocks=[blk_1094097355_20552508{UCState=COMMITTED, truncateBlock=null,
> primaryNodeIndex=0,
> replicas=[ReplicaUC[[DISK]DS-03bed13e-5cdd-4207-91b6-abd83f9eb7d3:NORMAL:<DN1>:50010|RBW]]}].
> at
> com.google.common.base.Preconditions.checkState(Preconditions.java:172)
> at
> org.apache.hadoop.hdfs.server.namenode.INodeFile.assertAllBlocksComplete(INodeFile.java:222)
> at
> org.apache.hadoop.hdfs.server.namenode.INodeFile.toCompleteFile(INodeFile.java:209)
> at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.finalizeINodeFileUnderConstruction(FSNamesystem.java:4218)
> at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.closeFileCommitBlocks(FSNamesystem.java:4457)
> at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.commitBlockSynchronization(FSNamesystem.java:4419)
> at
> org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.commitBlockSynchronization(NameNodeRpcServer.java:837)
> at
> org.apache.hadoop.hdfs.protocolPB.DatanodeProtocolServerSideTranslatorPB.commitBlockSynchronization(DatanodeProtocolServerSideTranslatorPB.java:291)
> at
> org.apache.hadoop.hdfs.protocol.proto.DatanodeProtocolProtos$DatanodeProtocolService$2.callBlockingMethod(DatanodeProtocolProtos.java:28768)
> at
> org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:616)
> at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:969)
> at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2049)
> at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2045)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:415)
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1679)
> at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2043)
> at org.apache.hadoop.ipc.Client.call(Client.java:1475)
> at org.apache.hadoop.ipc.Client.call(Client.java:1412)
> at
> org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:229)
> at com.sun.proxy.$Proxy16.commitBlockSynchronization(Unknown Source)
> at
> org.apache.hadoop.hdfs.protocolPB.DatanodeProtocolClientSideTranslatorPB.commitBlockSynchronization(DatanodeProtocolClientSideTranslatorPB.java:312)
> at
> org.apache.hadoop.hdfs.server.datanode.DataNode.syncBlock(DataNode.java:2780)
> at
> org.apache.hadoop.hdfs.server.datanode.DataNode.recoverBlock(DataNode.java:2642)
> at
> org.apache.hadoop.hdfs.server.datanode.DataNode.access$400(DataNode.java:243)
> at
> org.apache.hadoop.hdfs.server.datanode.DataNode$5.run(DataNode.java:2519)
> at java.lang.Thread.run(Thread.java:744){code}
> On the namenode side
> {code}
> 2016-09-19 09:02:25,835 INFO
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem:
> commitBlockSynchronization(oldBlock=BP-<someid>:blk_1094097355_20357090,
> newgenerationstamp=20552508, newlength=18642324, newtargets=[<DN1>:50010],
> closeFile=true, deleteBlock=false){code}
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