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From "Jim Brennan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-7678) Ability to enable logging of container memory stats
Date Thu, 04 Jan 2018 15:26:00 GMT

    [ https://issues.apache.org/jira/browse/YARN-7678?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16311491#comment-16311491

Jim Brennan commented on YARN-7678:

The unit test failure in TestContainerSchedulerQueuing is unrelated to this change.  I reran
that test locally and it still succeeds for me.
I described the testing I've done in an earlier comment.

I think the branch-2 patch is ready for review.

> Ability to enable logging of container memory stats
> ---------------------------------------------------
>                 Key: YARN-7678
>                 URL: https://issues.apache.org/jira/browse/YARN-7678
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: nodemanager
>    Affects Versions: 2.8.0, 3.0.0
>            Reporter: Jim Brennan
>            Assignee: Jim Brennan
>         Attachments: YARN-7678-branch-2.001.patch, YARN-7678.001.patch
> YARN-3424 changed logging of memory stats from ContainersMonitorImpl to INFO to DEBUG.
> We have found these log messages to be useful information in Out-of-Memory situations
- they provide detail that helps show the memory profile of the container over time, which
can be helpful in determining root cause.
> Here's an example message from YARN-3424:
> {noformat}
> 2015-03-27 09:32:48,905 INFO org.apache.hadoop.yarn.server.nodemanager.containermanager.monitor.ContainersMonitorImpl:
Memory usage of ProcessTree 9215 for container-id container_1427462602546_0002_01_000008:
189.8 MB of 1 GB physical memory used; 2.6 GB of 2.1 GB virtual memory used
> {noformat}
> Propose to change this to use a separate logger for this message, so that we can enable
debug logging for this without enabling all of the other debug logging for ContainersMonitorImpl.

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