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From "Naganarasimha G R (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-6523) RM requires large memory in sending out security tokens as part of Node Heartbeat in large cluster
Date Tue, 22 Aug 2017 04:55:02 GMT

    [ https://issues.apache.org/jira/browse/YARN-6523?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16136281#comment-16136281
] 

Naganarasimha G R commented on YARN-6523:
-----------------------------------------

Thanks [~rchiang], for having a look into this, as per the discussion above this is like good
to have improvement rather than bug, and also its not of high priority hence planning to get
it in next version. So have removed the target version and changed type to improvement.

> RM requires large memory in sending out security tokens as part of Node Heartbeat in
large cluster
> --------------------------------------------------------------------------------------------------
>
>                 Key: YARN-6523
>                 URL: https://issues.apache.org/jira/browse/YARN-6523
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: RM
>    Affects Versions: 2.8.0, 2.7.3
>            Reporter: Naganarasimha G R
>            Assignee: Naganarasimha G R
>            Priority: Critical
>
> Currently as part of heartbeat response RM sets all application's tokens though all applications
might not be active on the node. On top of it NodeHeartbeatResponsePBImpl converts tokens
for each app into SystemCredentialsForAppsProto. Hence for each node and each heartbeat too
many SystemCredentialsForAppsProto objects were getting created.
> We hit a OOM while testing for 2000 concurrent apps on 500 nodes cluster with 8GB RAM
configured for RM



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