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https://issues.apache.org/jira/browse/HDFS-3754?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13429552#comment-13429552
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Colin Patrick McCabe commented on HDFS-3754:
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Initializing the ReadaheadPool in DataNode seems like a good idea to me. I
also tested the latest patch, and it worked for me.
Would it be worthwhile to add a comment to ReadaheadPool about the importance
of having the correct thread context? Or maybe just a reference to this JIRA.
I know that I definitely wouldn't have considered the importance of thread
context in this situation.
> BlockSender doesn't shutdown ReadaheadPool threads
> --------------------------------------------------
>
> Key: HDFS-3754
> URL: https://issues.apache.org/jira/browse/HDFS-3754
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: data-node
> Affects Versions: 1.2.0, 2.0.0-alpha
> Reporter: Eli Collins
> Assignee: Eli Collins
> Attachments: hdfs-3754.txt, hdfs-3754.txt, hdfs-3754.txt,
> hdfs-3754.txt, hdfs-3754.txt, hdfs-3754.txt
>
>
> The BlockSender doesn't shutdown the ReadaheadPool threads so when tests are
> run with native libraries some tests fail (time out) because shutdown hangs
> waiting for the outstanding threads to exit.
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