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https://issues.apache.org/jira/browse/YARN-6042?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15866465#comment-15866465
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ASF GitHub Bot commented on YARN-6042:
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GitHub user flyrain opened a pull request:
https://github.com/apache/hadoop/pull/193
YARN-6042. Fairscheduler: Dump scheduler state in log.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/flyrain/hadoop yarn-6042
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/hadoop/pull/193.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #193
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commit de6c969973d5b50aa2b461be1560b1e9b80cc9dc
Author: Yufei Gu <[email protected]>
Date: 2017-01-13T01:35:17Z
YARN-6042. Fairscheduler: Dump scheduler state in log.
----
> Fairscheduler: Dump scheduler state in log
> ------------------------------------------
>
> Key: YARN-6042
> URL: https://issues.apache.org/jira/browse/YARN-6042
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: fairscheduler
> Reporter: Yufei Gu
> Assignee: Yufei Gu
> Attachments: YARN-6042.001.patch, YARN-6042.002.patch
>
>
> To improve the debugging of scheduler issues it would be a big improvement to
> be able to dump the scheduler state into a log on request.
> The Dump the scheduler state at a point in time would allow debugging of a
> scheduler that is not hung (deadlocked) but also not assigning containers.
> Currently we do not have a proper overview of what state the scheduler and
> the queues are in and we have to make assumptions or guess
> The scheduler and queue state needed would include (not exhaustive):
> - instantaneous and steady fair share (app / queue)
> - AM share and resources
> - weight
> - app demand
> - application run state (runnable/non runnable)
> - last time at fair/min share
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