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https://issues.apache.org/jira/browse/HDFS-5747?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Work on HDFS-5747 started by Arpit Agarwal.
> BlocksMap.getStoredBlock(..) and
> BlockInfoUnderConstruction.addReplicaIfNotPresent(..) may throw
> NullPointerException
> ---------------------------------------------------------------------------------------------------------------------
>
> Key: HDFS-5747
> URL: https://issues.apache.org/jira/browse/HDFS-5747
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: namenode
> Reporter: Tsz Wo (Nicholas), SZE
> Assignee: Arpit Agarwal
>
> Found these NPEs in [build
> #5849|https://builds.apache.org/job/PreCommit-HDFS-Build/5849//testReport/org.apache.hadoop.hdfs/TestPersistBlocks/TestRestartDfsWithFlush/].
> - BlocksMap is accessed after close:
> {code}
> 2014-01-09 04:28:32,350 WARN ipc.Server (Server.java:run(2060)) - IPC Server
> handler 2 on 58333, call
> org.apache.hadoop.hdfs.server.protocol.DatanodeProtocol.blockReceivedAndDeleted
> from 127.0.0.1:55572 Call#32 Retry#0: error: java.lang.NullPointerException
> java.lang.NullPointerException
> at
> org.apache.hadoop.hdfs.server.blockmanagement.BlocksMap.getStoredBlock(BlocksMap.java:113)
> at
> org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.processReportedBlock(BlockManager.java:1915)
> at
> org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.processAndHandleReportedBlock(BlockManager.java:2698)
> at
> org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.addBlock(BlockManager.java:2685)
> at
> org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.processIncrementalBlockReport(BlockManager.java:2759)
> at
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem.processIncrementalBlockReport(FSNamesystem.java:5321)
> at
> org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.blockReceivedAndDeleted(NameNodeRpcServer.java:1018)
> ...
> {code}
> - expectedLocation can be null.
> {code}
> 2014-01-09 04:28:35,384 WARN ipc.Server (Server.java:run(2060)) - IPC Server
> handler 5 on 58333, call
> org.apache.hadoop.hdfs.server.protocol.DatanodeProtocol.blockReport from
> 127.0.0.1:55583 Call#47 Retry#0: error: java.lang.NullPointerException
> java.lang.NullPointerException
> at
> org.apache.hadoop.hdfs.server.blockmanagement.BlockInfoUnderConstruction.addReplicaIfNotPresent(BlockInfoUnderConstruction.java:331)
> at
> org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.processFirstBlockReport(BlockManager.java:1801)
> at
> org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.processReport(BlockManager.java:1645)
> at
> org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.blockReport(NameNodeRpcServer.java:987)
> ...
> {code}
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