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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-5279) Jobs can deadlock if headroom is limited by cpu instead of memory
Date Tue, 23 Sep 2014 11:06:36 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-5279?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14144659#comment-14144659
] 

Hudson commented on MAPREDUCE-5279:
-----------------------------------

FAILURE: Integrated in Hadoop-Yarn-trunk #689 (See [https://builds.apache.org/job/Hadoop-Yarn-trunk/689/])
MAPREDUCE-5279. Made MR headroom calculation honor cpu dimension when YARN scheduler resource
type is memory plus cpu. Contributed by Peng Zhang and Varun Vasudev. (zjshen: rev 376233cdd4a4ddbde5a92a0627f78338cb4c38b7)
* hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/util/resource/Resources.java
* hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/test/java/org/apache/hadoop/mapreduce/v2/app/rm/TestRMContainerAllocator.java
* hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/main/java/org/apache/hadoop/mapreduce/v2/app/rm/ResourceCalculatorUtils.java
* hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/main/java/org/apache/hadoop/mapreduce/v2/app/rm/RMContainerAllocator.java
* hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app/src/main/java/org/apache/hadoop/mapreduce/v2/app/rm/RMCommunicator.java
* hadoop-mapreduce-project/CHANGES.txt


> Jobs can deadlock if headroom is limited by cpu instead of memory
> -----------------------------------------------------------------
>
>                 Key: MAPREDUCE-5279
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5279
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv2, scheduler
>    Affects Versions: 2.0.3-alpha
>            Reporter: Peng Zhang
>            Assignee: Peng Zhang
>            Priority: Critical
>             Fix For: 2.6.0
>
>         Attachments: MAPREDUCE-5279-branch-2.patch, MAPREDUCE-5279-v2.patch, MAPREDUCE-5279.patch,
apache-mapreduce-5279.3.patch, apache-mapreduce-5279.4.patch, apache-mapreduce-5279.5.patch,
apache-mapreduce-5279.6.patch, apache-mapreduce-5279.7.patch
>
>
> YARN-2 imported cpu dimension scheduling, but MR RMContainerAllocator doesn't take into
account virtual cores while scheduling reduce tasks.
> This may cause more reduce tasks to be scheduled because memory is enough. And on a small
cluster, this will end with deadlock, all running containers are reduce tasks but map phase
is not finished. 



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