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https://issues.apache.org/jira/browse/MESOS-7566?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16026712#comment-16026712
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Zhitao Li commented on MESOS-7566:
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I suspect this is another manifesting of root cause in MESOS-4553.
A couple of observations:
1 there is always a revocable resource decrease as well as a UNRESERVE
operation before crash;
2 DRFSorter somehow gets updated with the newer (and smaller value) in its
total_ but somehow still asked to remove an older value, thus code crashed;
3 The reason about 2 is possibly a race condition between master and
hierarchical process queue (unfortunately, without a coredump or verbose
logging, this is still pretty hard to diagnose further based on my knowledge of
the codebase, as there are still multiple code paths leading the crash)
> 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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