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https://issues.apache.org/jira/browse/YARN-110?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13462150#comment-13462150
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Hadoop QA commented on YARN-110:
--------------------------------
-1 overall. Here are the results of testing the latest attachment
http://issues.apache.org/jira/secure/attachment/12546372/YARN-110.patch
against trunk revision .
+1 @author. The patch does not contain any @author tags.
-1 tests included. The patch doesn't appear to include any new or modified
tests.
Please justify why no new tests are needed for this
patch.
Also please list what manual steps were performed to
verify this patch.
-1 javac. The patch appears to cause the build to fail.
Console output: https://builds.apache.org/job/PreCommit-YARN-Build/48//console
This message is automatically generated.
> AM releases too many containers due to the protocol
> ---------------------------------------------------
>
> Key: YARN-110
> URL: https://issues.apache.org/jira/browse/YARN-110
> Project: Hadoop YARN
> Issue Type: Bug
> Components: resourcemanager, scheduler
> Reporter: Arun C Murthy
> Assignee: Arun C Murthy
> Attachments: YARN-110.patch
>
>
> - AM sends request asking 4 containers on host H1.
> - Asynchronously, host H1 reaches RM and gets assigned 4 containers. RM at
> this point, sets the value against H1 to
> zero in its aggregate request-table for all apps.
> - In the mean-while AM gets to need 3 more containers, so a total of 7
> including the 4 from previous request.
> - Today, AM sends the absolute number of 7 against H1 to RM as part of its
> request table.
> - RM seems to be overriding its earlier value of zero against H1 to 7 against
> H1. And thus allocating 7 more
> containers.
> - AM already gets 4 in this scheduling iteration, but gets 7 more, a total of
> 11 instead of the required 7.
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