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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-5483) NN should gracefully handle multiple block replicas on same DN
Date Thu, 20 Feb 2014 02:51:19 GMT

    [ https://issues.apache.org/jira/browse/HDFS-5483?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13906527#comment-13906527
] 

Hudson commented on HDFS-5483:
------------------------------

SUCCESS: Integrated in Hadoop-trunk-Commit #5193 (See [https://builds.apache.org/job/Hadoop-trunk-Commit/5193/])
HDFS-5483. NN should gracefully handle multiple block replicas on same DN. (Arpit Agarwal)
(arp: http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1570040)
* /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/blockmanagement/BlockManager.java
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/TestBlockHasMultipleReplicasOnSameDN.java


> NN should gracefully handle multiple block replicas on same DN
> --------------------------------------------------------------
>
>                 Key: HDFS-5483
>                 URL: https://issues.apache.org/jira/browse/HDFS-5483
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: namenode
>    Affects Versions: Heterogeneous Storage (HDFS-2832)
>            Reporter: Arpit Agarwal
>            Assignee: Arpit Agarwal
>             Fix For: 3.0.0, 2.4.0
>
>         Attachments: h5483.02.patch, h5483.03.patch, h5483.04.patch
>
>
> {{BlockManager#reportDiff}} can cause an assertion failure in {{BlockInfo#moveBlockToHead}}
if the block report shows the same block as belonging to more than one storage.
> The issue is that {{moveBlockToHead}} assumes it will find the DatanodeStorageInfo for
the given block.
> Exception details:
> {code}
> java.lang.AssertionError: Index is out of bound
>         at org.apache.hadoop.hdfs.server.blockmanagement.BlockInfo.setNext(BlockInfo.java:152)
>         at org.apache.hadoop.hdfs.server.blockmanagement.BlockInfo.moveBlockToHead(BlockInfo.java:351)
>         at org.apache.hadoop.hdfs.server.blockmanagement.DatanodeStorageInfo.moveBlockToHead(DatanodeStorageInfo.java:243)
>         at org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.reportDiff(BlockManager.java:1841)
>         at org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.processReport(BlockManager.java:1709)
>         at org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.processReport(BlockManager.java:1637)
>         at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.blockReport(NameNodeRpcServer.java:984)
>         at org.apache.hadoop.hdfs.server.datanode.TestDataNodeVolumeFailure.testVolumeFailure(TestDataNodeVolumeFailure.java:165)
> {code}



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