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Date: Thu, 15 Mar 2012 19:18:38 +0000 (UTC)
From: "Hudson (Commented) (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
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Subject: [jira] [Commented] (HDFS-3005) ConcurrentModificationException in
 FSDataset$FSVolume.getDfsUsed(..)
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    [ https://issues.apache.org/jira/browse/HDFS-3005?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13230439#comment-13230439 ] 

Hudson commented on HDFS-3005:
------------------------------

Integrated in Hadoop-Mapreduce-trunk-Commit #1887 (See [https://builds.apache.org/job/Hadoop-Mapreduce-trunk-Commit/1887/])
    HDFS-3005. FSVolume.decDfsUsed(..) should be synchronized. (Revision 1301127)

     Result = ABORTED
szetszwo : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1301127
Files : 
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/FSDataset.java

                
> ConcurrentModificationException in FSDataset$FSVolume.getDfsUsed(..)
> --------------------------------------------------------------------
>
>                 Key: HDFS-3005
>                 URL: https://issues.apache.org/jira/browse/HDFS-3005
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: data-node
>    Affects Versions: 0.24.0
>            Reporter: Tsz Wo (Nicholas), SZE
>            Assignee: Tsz Wo (Nicholas), SZE
>             Fix For: 0.24.0, 0.23.3
>
>         Attachments: HDFS-3005.patch, h3005_20120312.patch, h3005_20120314.patch, h3005_20120314b.patch
>
>
> Saw this in [build #1888|https://builds.apache.org/job/PreCommit-HDFS-Build/1888//testReport/org.apache.hadoop.hdfs.server.datanode/TestMulitipleNNDataBlockScanner/testBlockScannerAfterRestart/].
> {noformat}
> java.util.ConcurrentModificationException
> 	at java.util.HashMap$HashIterator.nextEntry(HashMap.java:793)
> 	at java.util.HashMap$EntryIterator.next(HashMap.java:834)
> 	at java.util.HashMap$EntryIterator.next(HashMap.java:832)
> 	at org.apache.hadoop.hdfs.server.datanode.FSDataset$FSVolume.getDfsUsed(FSDataset.java:557)
> 	at org.apache.hadoop.hdfs.server.datanode.FSDataset$FSVolumeSet.getDfsUsed(FSDataset.java:809)
> 	at org.apache.hadoop.hdfs.server.datanode.FSDataset$FSVolumeSet.access$1400(FSDataset.java:774)
> 	at org.apache.hadoop.hdfs.server.datanode.FSDataset.getDfsUsed(FSDataset.java:1124)
> 	at org.apache.hadoop.hdfs.server.datanode.BPOfferService.sendHeartBeat(BPOfferService.java:406)
> 	at org.apache.hadoop.hdfs.server.datanode.BPOfferService.offerService(BPOfferService.java:490)
> 	at org.apache.hadoop.hdfs.server.datanode.BPOfferService.run(BPOfferService.java:635)
> 	at java.lang.Thread.run(Thread.java:662)
> {noformat}

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