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https://issues.apache.org/jira/browse/MESOS-7566?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16037599#comment-16037599
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Benjamin Mahler commented on MESOS-7566:
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[~xujyan] can you file a ticket for the race you described? It isn't the issue 
in this ticket AFAICT, but we should capture it and fix it as well.

> Master crash due to failed check in DRFSorter::remove
> -----------------------------------------------------
>
>                 Key: MESOS-7566
>                 URL: https://issues.apache.org/jira/browse/MESOS-7566
>             Project: Mesos
>          Issue Type: Bug
>    Affects Versions: 1.1.1, 1.1.2
>            Reporter: Zhitao Li
>            Priority: Critical
>
> A check in [sorter.cpp#L355 in 1.1.2 | 
> https://github.com/apache/mesos/blob/1.1.2/src/master/allocator/sorter/drf/sorter.cpp#L355]
>  is triggered occasionally in our cluster and crashes the master leader.
> I manually modified that check to print out the related variables, and the 
> following is a master log.
> https://gist.github.com/zhitaoli/0662d9fe1f6d57de344951c05b536bad#file-gistfile1-txt
> From the log, it seems like the check was using an stale value revocable CPU  
> {{26}} while the new value was updated to 25, thus the check crashed.
> So far two verified occurrence of this bug are both observed near an 
> {{UNRESERVE}} operation (see lines above in the log).



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