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From "Rohith Sharma K S (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4862) Handle duplicate completed containers in RMNodeImpl
Date Fri, 28 Oct 2016 05:45:58 GMT

    [ https://issues.apache.org/jira/browse/YARN-4862?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15614386#comment-15614386
] 

Rohith Sharma K S commented on YARN-4862:
-----------------------------------------

I request please hold down committing this patch. Actually I was discovered some scenarios
where completedContainers list get  never removed which would lead to leak in completedContainers
gradually. I will confirm those scenarios. 

> Handle duplicate completed containers in RMNodeImpl
> ---------------------------------------------------
>
>                 Key: YARN-4862
>                 URL: https://issues.apache.org/jira/browse/YARN-4862
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: resourcemanager
>            Reporter: Rohith Sharma K S
>            Assignee: Rohith Sharma K S
>         Attachments: 0001-YARN-4862.patch, 0002-YARN-4862.patch, 0003-YARN-4862.patch
>
>
> As per [comment|https://issues.apache.org/jira/browse/YARN-4852?focusedCommentId=15209689&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-15209689]
from [~sharadag], there should be safe guard for duplicated container status in RMNodeImpl
before creating UpdatedContainerInfo. 
> Or else in heavily loaded cluster where event processing is gradually slow, if any duplicated
container are sent to RM(may be bug in NM also), there is significant impact that RMNodImpl
always create UpdatedContainerInfo for duplicated containers. This result in increase in the
heap memory and causes problem like YARN-4852.
> This is an optimization for issue kind YARN-4852



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