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https://issues.apache.org/jira/browse/HDFS-3664?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13453585#comment-13453585
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Eli Collins commented on HDFS-3664:
-----------------------------------
Change looks good. And the test failures look unrelated,
TestDatanodeBlockScanner is known and looks like its still running java process
is locking the storage dir causing TestDatanodeBlockScanner to fail. I verified
TestBlockMissingException with your patch for sanity.
Not your change but in BlockManager we should check datanodeManager and
blocksMap for null like we do pendingReplications right?
> BlockManager race when stopping active services
> -----------------------------------------------
>
> Key: HDFS-3664
> URL: https://issues.apache.org/jira/browse/HDFS-3664
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: test
> Affects Versions: 2.0.0-alpha
> Reporter: Eli Collins
> Assignee: Colin Patrick McCabe
> Attachments: HDFS-3664.001.patch
>
>
> Looks like there's a race hit by the test where we try to do block management
> while shutting down (eg allocate a block or compute replication work after
> BlocksMap#close, resulting in an NPE).
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