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https://issues.apache.org/jira/browse/HDFS-6494?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Liang Xie updated HDFS-6494:
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Attachment: HDFS-6494.txt
Sorry for the late reply, i tried to repro with the attached HDFS-6494.txt test
case which is a trunk patch porting from LiuLei's hedged-read-test-case.patch
file. Looped 10 times and all passed. To me your original failure was caused by
the CountDownLatch not be protected by a final statement, which was fixed in
HDFS-6231(it's available since 2.4.1) by [~cnauroth]. I'd like to close the
current jira due to duplicated.
[~liulei.cn], if you still can repro it after 2.4.1, please feel free to reopen
it, thanks all the same!
> In some case, the hedged read will lead to client infinite wait.
> ------------------------------------------------------------------
>
> Key: HDFS-6494
> URL: https://issues.apache.org/jira/browse/HDFS-6494
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: hdfs-client
> Affects Versions: 2.4.0
> Reporter: LiuLei
> Assignee: Liang Xie
> Attachments: HDFS-6494.txt, hedged-read-bug.patch,
> hedged-read-test-case.patch
>
>
> When I use "hedged read", If there is only one live datanode, the reading
> from the datanode throw TimeoutException and ChecksumException., the Client
> will infinite wait.
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