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Date: Thu, 7 Sep 2017 09:30:00 +0000 (UTC)
From: "Sunil G (JIRA)" <jira@apache.org>
To: yarn-issues@hadoop.apache.org
Message-ID: <JIRA.13100162.1504708594000.48176.1504776600319@Atlassian.JIRA>
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References: <JIRA.13100162.1504708594000@Atlassian.JIRA> <JIRA.13100162.1504708594271@jira-lw-us.apache.org>
Subject: [jira] [Commented] (YARN-7163) RM crashes with OOM in secured
 cluster when HA is enabled
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archived-at: Thu, 07 Sep 2017 09:30:06 -0000


    [ https://issues.apache.org/jira/browse/YARN-7163?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16156734#comment-16156734 ] 

Sunil G commented on YARN-7163:
-------------------------------

Thank you [~rohithsharma] for detailed analysis.

It seems that old reference of {{rmContext}} is still not yet dereferenced when RM moved from Active to Standby. Hence when this RM moves back to Active again, we have a stale reference which have this applications reference, Nice catch.

I agree with your analysis, we should not keep the reference of RMContext in services which will run with same lifetime as of jvm.

> RM crashes with OOM in secured cluster when HA is enabled
> ---------------------------------------------------------
>
>                 Key: YARN-7163
>                 URL: https://issues.apache.org/jira/browse/YARN-7163
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: resourcemanager
>            Reporter: Rohith Sharma K S
>            Assignee: Rohith Sharma K S
>         Attachments: suspect-1.png, suspect-2.png, YARN-7163.01.patch, YARN-7163.02.patch
>
>
> It is observed that RM crashes with heap space OOM in secure cluster(http authentication is kerborse) when RM HA is enabled. 
> Scenario is 
> 1. Start RM in HA secure mode. Lets say RM1 is active mode.
> 2. Run many applications so that it uses greater than 50% of heap space configured. Lets say, if heap space is 2GB, then run applications that occupy 1.5GB of heap space. 
> 3. Switch RM to StandBy and bring back to Active! While recovering applications from state store, RM crashes with OOM. 
> *Note* : This issue will happen only when RM is started as ACTIVE directly. (not switched from standby to active during start of JVM)
> Heap dump shows that RMAuthenticationFilter holds 60% heap space! And other 40% held by RMAppState which is during recovering from state store. This exceeds the heap space and crashes with OOM. 


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