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https://issues.apache.org/jira/browse/HADOOP-1136?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12486547
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Hadoop QA commented on HADOOP-1136:
-----------------------------------
+1, because
http://issues.apache.org/jira/secure/attachment/12353893/neededReplicationAdd.patch
applied and successfully tested against trunk revision
http://svn.apache.org/repos/asf/lucene/hadoop/trunk/525290. Results are at
http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch
> exception in UnderReplicatedBlocks:add when ther are more replicas of a block
> than required
> -------------------------------------------------------------------------------------------
>
> Key: HADOOP-1136
> URL: https://issues.apache.org/jira/browse/HADOOP-1136
> Project: Hadoop
> Issue Type: Bug
> Components: dfs
> Affects Versions: 0.12.2
> Reporter: dhruba borthakur
> Assigned To: Hairong Kuang
> Fix For: 0.13.0
>
> Attachments: neededReplicationAdd.patch
>
>
> I was running a random writer followed by a sort when I saw this condition:
> Exception in thread "[EMAIL PROTECTED]"
> java.lang.ArrayIndexOutOfBoundsException: 3
> at
> org.apache.hadoop.dfs.FSNamesystem$UnderReplicatedBlocks.add(FSNamesystem.java:447)
> at
> org.apache.hadoop.dfs.FSNamesystem$UnderReplicatedBlocks.add(FSNamesystem.java:464)
> at
> org.apache.hadoop.dfs.FSNamesystem.processPendingReplications(FSNamesystem.java:1891)
> at
> org.apache.hadoop.dfs.FSNamesystem$ReplicationMonitor.run(FSNamesystem.java:1795)
> at java.lang.Thread.run(Thread.java:619)
> processPendingReplications is invoking neededReplications.add(). The add
> method then invokes add(block, 3, 4). This add method calls getPriority and
> that returns 3. Now, the call to priorityQueues[3].add() throws an
> OutOfBoundsException.
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