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https://issues.apache.org/jira/browse/HDFS-3754?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13427824#comment-13427824
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Tsz Wo (Nicholas), SZE commented on HDFS-3754:
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BlockSender readaheadPool is static. If we shutdown it, could we still able to
restart DNs or shutdown some of the DNs when running multiple DNs in unit tests?
> 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
>
>
> 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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