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From "hcarrot (Jira)" <j...@apache.org>
Subject [jira] [Updated] (YARN-9927) RM multi-thread event processing mechanism
Date Tue, 05 Nov 2019 08:41:00 GMT

     [ https://issues.apache.org/jira/browse/YARN-9927?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

hcarrot updated YARN-9927:
--------------------------
    Attachment:     (was: YARN-9927.001.patch)

> RM multi-thread event processing mechanism
> ------------------------------------------
>
>                 Key: YARN-9927
>                 URL: https://issues.apache.org/jira/browse/YARN-9927
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: yarn
>    Affects Versions: 3.0.0, 2.9.2
>            Reporter: hcarrot
>            Priority: Major
>         Attachments: RM multi-thread event processing mechanism.pdf, YARN-9927.001.patch
>
>
> Recently, we have observed serious event blocking in RM event dispatcher queue. After
analysis of RM event monitoring data and RM event processing logic, we found that
> 1) environment: a cluster with thousands of nodes
> 2) RMNodeStatusEvent dominates 90% time consumption of RM event scheduler
> 3) Meanwhile, RM event processing is in a single-thread mode, and It results in the
low headroom of RM event scheduler, thus performance of RM.
> So we proposed a RM multi-thread event processing mechanism to improve RM performance.



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