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From "Jason Lowe (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-6862) Nodemanager resource usage metrics sometimes are negative
Date Mon, 24 Jul 2017 15:56:00 GMT

    [ https://issues.apache.org/jira/browse/YARN-6862?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16098609#comment-16098609

Jason Lowe commented on YARN-6862:

I believe the case of it returning -1B is when the process exited just as the resource monitor
was going to examine it.  It's an invalid result because there is no process there.  We should
not be aggregating those results if that's indeed the case.

> Nodemanager resource usage metrics sometimes are negative
> ---------------------------------------------------------
>                 Key: YARN-6862
>                 URL: https://issues.apache.org/jira/browse/YARN-6862
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: nodemanager
>    Affects Versions: 2.8.2
>            Reporter: YunFan Zhou
> When we collect real-time metrics of resource usage in NM, we found those values sometimes
are invalid.
> For example, the following are values when collected at some point:
> "milliVcoresUsed":-5808,
> "currentPmemUsage":-1,
> "currentVmemUsage":-1,
> "cpuUsagePercentPerCore":-968.1026
> "cpuUsageTotalCoresPercentage":-24.202564,
> "pmemLimit":2147483648,
> "vmemLimit":4509715456
> There are many negative values,  there may a bug in NM. 
> We should fix it, because the real-time metrics of NM is pretty important for us sometimes.

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