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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-5497) '5s sleep' in MRAppMaster.shutDownJob is only needed before stopping ClientService
Date Wed, 11 Sep 2013 10:59:53 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-5497?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13764201#comment-13764201
] 

Hudson commented on MAPREDUCE-5497:
-----------------------------------

SUCCESS: Integrated in Hadoop-Yarn-trunk #329 (See [https://builds.apache.org/job/Hadoop-Yarn-trunk/329/])
MAPREDUCE-5497. Changed MRAppMaster to sleep only after doing everything else but just before
ClientService to avoid race conditions during RM restart. Contributed by Jian He. (vinodkv:
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1521699)
* /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/MRAppMaster.java
* /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/main/java/org/apache/hadoop/mapreduce/v2/app/client/ClientService.java
* /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/main/java/org/apache/hadoop/mapreduce/v2/app/client/MRClientService.java
* /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/test/java/org/apache/hadoop/mapreduce/v2/app/MRApp.java
* /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/test/java/org/apache/hadoop/mapreduce/v2/app/TestMRAppComponentDependencies.java
* /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/test/java/org/apache/hadoop/mapreduce/v2/app/TestStagingCleanup.java

                
> '5s sleep'  in MRAppMaster.shutDownJob is only needed before stopping ClientService
> -----------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-5497
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5497
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>            Reporter: Jian He
>            Assignee: Jian He
>             Fix For: 2.1.1-beta
>
>         Attachments: MAPREDUCE-5497.1.patch, MAPREDUCE-5497.1.patch, MAPREDUCE-5497.2.patch,
MAPREDUCE-5497.patch
>
>
> Since the '5s sleep' is for the purpose to let clients know the final states, put it
after other services are stopped and only before stopping ClientService is enough. This can
reduce some race conditions like MAPREDUCE-5471

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