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From "Subru Krishnan (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 Mon, 09 Oct 2017 21:03:00 GMT

    [ https://issues.apache.org/jira/browse/YARN-6523?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16197691#comment-16197691
] 

Subru Krishnan commented on YARN-6523:
--------------------------------------

Thanks [~manirajv06@gmail.com], [~Naganarasimha], [~jlowe] for working on this. This looks
to be a serious performance bottleneck especially considering that Federation (YARN-2915)
is now part of 2.9.0. Can we accelerate this and get it resolved by 27th October?

> 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: Improvement
>          Components: RM
>    Affects Versions: 2.8.0, 2.7.3
>            Reporter: Naganarasimha G R
>            Assignee: Manikandan 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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