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https://issues.apache.org/jira/browse/HDFS-3936?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13457960#comment-13457960
]
Hudson commented on HDFS-3936:
------------------------------
Integrated in Hadoop-Common-trunk-Commit #2741 (See
[https://builds.apache.org/job/Hadoop-Common-trunk-Commit/2741/])
HDFS-3936. MiniDFSCluster shutdown races with BlocksMap usage. Contributed
by Eli Collins (Revision 1387255)
Result = SUCCESS
eli : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1387255
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/blockmanagement/BlocksMap.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestDFSClientRetries.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/web/TestWebHDFS.java
> MiniDFSCluster shutdown races with BlocksMap usage
> --------------------------------------------------
>
> Key: HDFS-3936
> URL: https://issues.apache.org/jira/browse/HDFS-3936
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 2.0.0-alpha
> Reporter: Eli Collins
> Assignee: Eli Collins
> Attachments: hdfs-3936.txt, hdfs-3936.txt, hdfs-3936.txt
>
>
> Looks like HDFS-3664 didn't fix the whole issue because the added join times
> out because the thread closing the BM (FSN#stopCommonServices) holds the FSN
> lock while closing the BM and the BM is block uninterruptedly trying to
> aquire the FSN lock.
> {noformat}
> 2012-09-13 18:54:12,526 FATAL hdfs.MiniDFSCluster
> (MiniDFSCluster.java:shutdown(1355)) - Test resulted in an unexpected exit
> org.apache.hadoop.util.ExitUtil$ExitException: Fatal exception with message
> null
> stack trace
> java.lang.NullPointerException
> at
> org.apache.hadoop.hdfs.server.blockmanagement.BlocksMap.getBlockCollection(BlocksMap.java:101)
> at
> org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.computeReplicationWorkForBlocks(BlockManager.java:1132)
> at
> org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.computeReplicationWork(BlockManager.java:1107)
> at
> org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.computeDatanodeWork(BlockManager.java:3061)
> at
> org.apache.hadoop.hdfs.server.blockmanagement.BlockManager$ReplicationMonitor.run(BlockManager.java:3023)
> at java.lang.Thread.run(Thread.java:662)
> {noformat}
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