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Posted to common-dev@hadoop.apache.org by "dhruba borthakur (JIRA)" <ji...@apache.org> on 2008/11/11 20:37:44 UTC
[jira] Resolved: (HADOOP-951)
java.util.ConcurrentModificationException in FSNamesystem.chooseTargets
[ https://issues.apache.org/jira/browse/HADOOP-951?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
dhruba borthakur resolved HADOOP-951.
-------------------------------------
Resolution: Cannot Reproduce
Fix Version/s: 0.20.0
This problem does not happen any more because this entire section has been re-written.
> java.util.ConcurrentModificationException in FSNamesystem.chooseTargets
> -------------------------------------------------------------------------
>
> Key: HADOOP-951
> URL: https://issues.apache.org/jira/browse/HADOOP-951
> Project: Hadoop Core
> Issue Type: Bug
> Components: dfs
> Affects Versions: 0.10.1
> Reporter: Koji Noguchi
> Fix For: 0.20.0
>
> Attachments: jstack.27108
>
>
> 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.
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