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  1. Hadoop Common
  2. HADOOP-951

java.util.ConcurrentModificationException in FSNamesystem.chooseTargets

    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major
    • Resolution: Cannot Reproduce
    • Affects Version/s: 0.10.1
    • Fix Version/s: None
    • Component/s: None
    • Labels:
      None

      Description

      2007-01-26 01:14:37,509 INFO org.apache.hadoop.ipc.Server: IPC Server handler 7 on 8020 call error: java.io.IOException: java.util.ConcurrentModificationException
      java.io.IOException: java.util.ConcurrentModificationException
      at java.util.AbstractList$Itr.checkForComodification(AbstractList.java:449)
      at java.util.AbstractList$Itr.next(AbstractList.java:420)
      at org.apache.hadoop.dfs.FSNamesystem.chooseTargets(FSNamesystem.java:2282)
      at org.apache.hadoop.dfs.FSNamesystem.startFile(FSNamesystem.java:484)
      at org.apache.hadoop.dfs.NameNode.create(NameNode.java:238)
      at sun.reflect.GeneratedMethodAccessor60.invoke(Unknown Source)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
      at java.lang.reflect.Method.invoke(Method.java:585)
      at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:337)
      at org.apache.hadoop.ipc.Server$Handler.run(Server.java:538)

      Not sure if it's related, but this exception happend when namenode was replicating many blocks.

        Attachments

        1. jstack.27108
          14 kB
          dhruba borthakur

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              • Assignee:
                Unassigned
                Reporter:
                knoguchi Koji Noguchi
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                • Created:
                  Updated:
                  Resolved: