[
https://issues.apache.org/jira/browse/HDFS-3936?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13455600#comment-13455600
]
Colin Patrick McCabe commented on HDFS-3936:
--------------------------------------------
Hmm, what's the rationale for blocking uninterruptedly in the BM?
> MiniDFSCluster shutdown may fail due to BlocksMap#getBlockCollection NPE
> ------------------------------------------------------------------------
>
> 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
>
> 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}
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira
