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https://issues.apache.org/jira/browse/HDFS-6231?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13966495#comment-13966495
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Hudson commented on HDFS-6231:
------------------------------
FAILURE: Integrated in Hadoop-Hdfs-trunk #1729 (See
[https://builds.apache.org/job/Hadoop-Hdfs-trunk/1729/])
HDFS-6231. DFSClient hangs infinitely if using hedged reads and all eligible
datanodes die. Contributed by Chris Nauroth. (cnauroth:
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1586551)
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSInputStream.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestPread.java
> DFSClient hangs infinitely if using hedged reads and all eligible datanodes
> die.
> --------------------------------------------------------------------------------
>
> Key: HDFS-6231
> URL: https://issues.apache.org/jira/browse/HDFS-6231
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: hdfs-client
> Affects Versions: 3.0.0, 2.4.0
> Reporter: Chris Nauroth
> Assignee: Chris Nauroth
> Fix For: 3.0.0, 2.4.1
>
> Attachments: HDFS-6231.1.patch
>
>
> When using hedged reads, and all eligible datanodes for the read get flagged
> as dead or ignored, then the client is supposed to refetch block locations
> from the NameNode to retry the read. Instead, we've seen that the client can
> hang indefinitely.
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