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From "Varun Vasudev (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-3294) Allow dumping of Capacity Scheduler debug logs via web UI for a fixed time period
Date Thu, 05 Mar 2015 08:49:38 GMT

    [ https://issues.apache.org/jira/browse/YARN-3294?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14348416#comment-14348416
] 

Varun Vasudev commented on YARN-3294:
-------------------------------------

We've been seeing this repeating pattern when trying to debug customer clusters. We essentially
do what you mention - go to the servlet, set the level to DEBUG for the scheduler for some
time, set the log level back to INFO, then ask customers to send us the resourcemanager log,
and grep/cut out the relevant sections. I was hoping that we could just tell them to click
the button, dump the scheduler logs for this brief period of time to a different file and
send us the file.

> Allow dumping of Capacity Scheduler debug logs via web UI for a fixed time period
> ---------------------------------------------------------------------------------
>
>                 Key: YARN-3294
>                 URL: https://issues.apache.org/jira/browse/YARN-3294
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: capacityscheduler
>            Reporter: Varun Vasudev
>            Assignee: Varun Vasudev
>
> It would be nice to have a button on the web UI that would allow dumping of debug logs
for just the capacity scheduler for a fixed period of time(1 min, 5 min or so) in a separate
log file. It would be useful when debugging scheduler behavior without affecting the rest
of the resourcemanager.



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