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From "Tsz Wo (Nicholas), SZE (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-3005) ConcurrentModificationException in FSDataset$FSVolume.getDfsUsed(..)
Date Thu, 23 Feb 2012 20:08:48 GMT
ConcurrentModificationException in FSDataset$FSVolume.getDfsUsed(..)
--------------------------------------------------------------------

                 Key: HDFS-3005
                 URL: https://issues.apache.org/jira/browse/HDFS-3005
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: data-node
            Reporter: Tsz Wo (Nicholas), SZE


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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