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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-5176) Preemptable annotations (to support preemption in MR)
Date Fri, 31 May 2013 03:16:21 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-5176?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13671096#comment-13671096
] 

Hadoop QA commented on MAPREDUCE-5176:
--------------------------------------

{color:green}+1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12585536/MAPREDUCE-5176.3.patch
  against trunk revision .

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:green}+1 tests included{color}.  The patch appears to include 1 new or modified
test files.

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of
javac compiler warnings.

    {color:green}+1 javadoc{color}.  The javadoc tool did not generate any warning messages.

    {color:green}+1 eclipse:eclipse{color}.  The patch built with eclipse:eclipse.

    {color:green}+1 findbugs{color}.  The patch does not introduce any new Findbugs (version
1.3.9) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase the total number
of release audit warnings.

    {color:green}+1 core tests{color}.  The patch passed unit tests in hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core.

    {color:green}+1 contrib tests{color}.  The patch passed contrib unit tests.

Test results: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/3706//testReport/
Console output: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/3706//console

This message is automatically generated.
                
> Preemptable annotations (to support preemption in MR)
> -----------------------------------------------------
>
>                 Key: MAPREDUCE-5176
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5176
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: mrv2
>            Reporter: Carlo Curino
>            Assignee: Carlo Curino
>             Fix For: 2.0.5-beta
>
>         Attachments: MAPREDUCE-5176.1.patch, MAPREDUCE-5176.2.patch, MAPREDUCE-5176.3.patch,
MAPREDUCE-5176.patch
>
>
> Proposing a patch that introduces a new annotation @Preemptable that represents to the
framework property of user-supplied classes (e.g., Reducer, OutputCommiter). The intended
semantics is that a tagged class is safe to be preempted between invocations. 
> (this is in spirit similar to the Output Contracts of [Nephele/PACT | https://stratosphere.eu/sites/default/files/papers/ComparingMapReduceAndPACTs_11.pdf])

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