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From "Wangda Tan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-6285) Add option to set max limit on ResourceManager for ApplicationClientProtocol.getApplications
Date Mon, 20 Mar 2017 21:48:41 GMT

    [ https://issues.apache.org/jira/browse/YARN-6285?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15933646#comment-15933646
] 

Wangda Tan commented on YARN-6285:
----------------------------------

Thanks [~zhaoyunjiong] for sharing the experimental results. Now I can understand why the
YARN-6339 required and I will check it in once it is ready.

For your last comment:
bq. On the cluster we applied this patch and set yarn.resourcemanager.max-limit-get-applications
to 400

I'm actually not sure about which part improves performance since there're two variables (patch
of YARN-6339 and changes of #apps). It will be more helpful if you can gets some benchmarks
from config with only one variable.

> Add option to set max limit on ResourceManager for ApplicationClientProtocol.getApplications
> --------------------------------------------------------------------------------------------
>
>                 Key: YARN-6285
>                 URL: https://issues.apache.org/jira/browse/YARN-6285
>             Project: Hadoop YARN
>          Issue Type: Improvement
>            Reporter: yunjiong zhao
>            Assignee: yunjiong zhao
>         Attachments: YARN-6285.001.patch, YARN-6285.002.patch, YARN-6285.003.patch
>
>
> When users called ApplicationClientProtocol.getApplications, it will return lots of data,
and generate lots of garbage on ResourceManager which caused long time GC.
> For example, on one of our RM, when called rest API " http://<rm http address:port>/ws/v1/cluster/apps"
it can return 150MB data which have 944 applications.
> getApplications have limit parameter, but some user might not set it, and then the limit
will be Long.MAX_VALUE.



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