[HDFS-2245] BlockManager.chooseTarget(..) throws NPE

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.23.0
• Component/s: namenode
• Hadoop Flags: Reviewed
• Assignee: Tsz-wo Sze
• Reporter: Tsz-wo Sze
• Created: 10/Aug/11 22:55
• Updated: 15/Nov/11 00:52
• Resolved: 11/Aug/11 05:28

Description

2011-08-10 20:20:51,350 INFO org.apache.hadoop.ipc.Server: IPC Server handler 1 on 8020, call: addBlock(/user/had
oopqa/passwd.1108102020.<NN hostname>.txt, DFSClient_NONMAPREDUCE_1875954430_1, null, null), rpc
 version=1, client version=68, methodsFingerPrint=-1239577025 from <gateway>:38874, error:
java.io.IOException: java.lang.NullPointerException
        at org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.chooseTarget(BlockManager.java:1225)
        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:1455)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.addBlock(NameNode.java:786)
        ...

Issue Links

• is broken by: HDFS-1332 When unable to place replicas, BlockPlacementPolicy should log reasons nodes were excluded