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From "Manikandan R (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (YARN-6523) Newly retrieved security Tokens are sent as part of each heartbeat to each node from RM which is not desirable in large cluster
Date Fri, 16 Feb 2018 12:49:00 GMT

    [ https://issues.apache.org/jira/browse/YARN-6523?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16366935#comment-16366935
] 

Manikandan R edited comment on YARN-6523 at 2/16/18 12:48 PM:
--------------------------------------------------------------

Thank you [~rohithsharma] for helping me in setting up a secure cluster. Huh ! :)  Thank
you [~bibinchundatt] for inputs.

[~Naganarasimha] / [~jlowe]

Was able to test the patch in live pseudo cluster and able to see token sequence no getting
incremented as and when any new token fetches from HDFS. Can you please review the patch?


was (Author: manirajv06@gmail.com):
Thank you [~rohithsharma] for helping me in setting up a secure cluster. Huh ! :)  Thank
you [~bibinchundatt] for inputs.

[~Naganarasimha] / [~jlowe]

Was able to test the patch in live pseudo cluste and able to see token sequence no getting
incremented as and when any new token fetches from HDFS. Can you please review the patch?

> Newly retrieved security Tokens are sent as part of each heartbeat to each node from
RM which is not desirable 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: Major
>         Attachments: YARN-6523.001.patch, YARN-6523.002.patch
>
>
> 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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