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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-6639) Process hangs in LocatedFileStatusFetcher if FileSystem.get throws
Date Thu, 12 May 2016 18:51:13 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-6639?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15281910#comment-15281910
] 

Hudson commented on MAPREDUCE-6639:
-----------------------------------

SUCCESS: Integrated in Hadoop-trunk-Commit #9753 (See [https://builds.apache.org/job/Hadoop-trunk-Commit/9753/])
MAPREDUCE-6639 Process hangs in LocatedFileStatusFetcher if (stevel: rev 7eddecd357014d4793df4bf2e5d987add02289f5)
* hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapred/LocatedFileStatusFetcher.java


> Process hangs in LocatedFileStatusFetcher if FileSystem.get throws
> ------------------------------------------------------------------
>
>                 Key: MAPREDUCE-6639
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6639
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv2
>    Affects Versions: 2.7.2
>            Reporter: Ryan Blue
>            Assignee: Ryan Blue
>             Fix For: 2.8.0
>
>         Attachments: MAPREDUCE-6639.2.patch
>
>
> ListLocatedFileStatusFetcher uses a thread pool, but one of the Callable thread functions,
[{{ProcessInitialInputPathCallable}}|https://github.com/apache/hadoop/blob/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapred/LocatedFileStatusFetcher.java#L306],
doesn't catch exceptions (the callbacks do). When an exception is thrown, the thread exists
and doesn't signal the error to the calling thread, which continues waiting to be signaled.
This can happen when a FS implementation cannot be found.



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