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https://issues.apache.org/jira/browse/HDFS-11303?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16123632#comment-16123632
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John Zhuge commented on HDFS-11303:
-----------------------------------
Saw TestDataNodeVolumeFailureReporting failure in Aug 10 qbt:
{noformat}
For more details, see
https://builds.apache.org/job/hadoop-qbt-trunk-java8-linux-x86/488/
[Aug 9, 2017 6:58:53 AM] (weichiu) HDFS-12117. HttpFS does not seem to support
SNAPSHOT related methods for
[Aug 9, 2017 12:56:43 PM] (aajisaka) YARN-6515. Fix warnings from Spotbugs in
hadoop-yarn-server-nodemanager.
[Aug 9, 2017 2:03:51 PM] (kihwal) HDFS-12157. Do fsyncDirectory(..) outside of
FSDataset lock. Contributed
[Aug 9, 2017 2:58:22 PM] (aajisaka) YARN-6958. Moving logging APIs over to
slf4j in
[Aug 9, 2017 5:51:29 PM] (wangda) YARN-6033. Add support for sections in
container-executor configuration
[Aug 9, 2017 9:46:05 PM] (kihwal) HDFS-12278. LeaseManager operations are
inefficient in 2.8. Contributed
[Aug 9, 2017 10:39:52 PM] (raviprak) MAPREDUCE-6923. Optimize MapReduce Shuffle
I/O for small partitions.
[Aug 10, 2017 6:23:26 AM] (sunilg) YARN-6631. Refactor loader.js in new Yarn
UI. Contributed by Akhil P B.
Failed junit tests :
hadoop.hdfs.server.datanode.TestDataNodeVolumeFailureReporting
{noformat}
> Hedged read might hang infinitely if read data from all DN failed
> ------------------------------------------------------------------
>
> Key: HDFS-11303
> URL: https://issues.apache.org/jira/browse/HDFS-11303
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: hdfs-client
> Affects Versions: 3.0.0-alpha1
> Reporter: Chen Zhang
> Assignee: Chen Zhang
> Attachments: HDFS-11303-001.patch, HDFS-11303-001.patch,
> HDFS-11303-002.patch, HDFS-11303-002.patch, HDFS-11303.003.patch,
> HDFS-11303.004.patch, HDFS-11303.005.patch
>
>
> Hedged read will read from a DN first, if timeout, then read other DNs
> simultaneously.
> If read all DN failed, this bug will cause the future-list not empty(the
> first timeout request left in list), and hang in the loop infinitely
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