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https://issues.apache.org/jira/browse/MAPREDUCE-4425?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13496203#comment-13496203
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Hudson commented on MAPREDUCE-4425:
-----------------------------------
Integrated in Hadoop-Mapreduce-trunk #1256 (See
[https://builds.apache.org/job/Hadoop-Mapreduce-trunk/1256/])
MAPREDUCE-4425. Speculation + Fetch failures can lead to a hung job (jlowe
via bobby) (Revision 1408360)
Result = SUCCESS
bobby : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1408360
Files :
* /hadoop/common/trunk/hadoop-mapreduce-project/CHANGES.txt
*
/hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/main/java/org/apache/hadoop/mapreduce/v2/app/job/impl/TaskImpl.java
*
/hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/test/java/org/apache/hadoop/mapreduce/v2/app/job/impl/TestTaskImpl.java
> Speculation + Fetch failures can lead to a hung job
> ---------------------------------------------------
>
> Key: MAPREDUCE-4425
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4425
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: mrv2
> Affects Versions: 0.23.1
> Reporter: Siddharth Seth
> Assignee: Jason Lowe
> Priority: Critical
> Fix For: 3.0.0, 2.0.3-alpha, 0.23.5
>
> Attachments: MAPREDUCE-4425-branch23.patch, MAPREDUCE-4425.patch,
> MAPREDUCE-4425.patch
>
>
> After a task goes to SUCCEEDED, FAILED/KILLED attempts are ignored.
> 1. attemp1 starts
> 2. speculative attempt starts
> 3. attempt 1 completes - Task moves to SUCCEEDED state
> 4. speculative attempt is KILLED
> 5. T_ATTEMPT_KILLED is ignored.
> 6. attemp1 1 fails with TOO_MANY_FETCH_FAILURES
> The job will effectively hang, since a new task attempt isn't started.
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