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https://issues.apache.org/jira/browse/MESOS-891?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13861942#comment-13861942
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Yan Xu commented on MESOS-891:
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https://reviews.apache.org/r/16625/
> Cgroups cleanup() should wait for all attached subsystems to be detached
> ------------------------------------------------------------------------
>
> Key: MESOS-891
> URL: https://issues.apache.org/jira/browse/MESOS-891
> Project: Mesos
> Issue Type: Bug
> Reporter: Yan Xu
> Assignee: Yan Xu
> Fix For: 0.16.0
>
>
> Otherwise the subsystems could still be attached when cleanup() exits and
> subsequent mount can fail.
> This was observed in:
> SlaveRecoveryTest/1.SchedulerFailover: assertion failure at
> https://github.com/apache/mesos/blob/9efb009d55e18e6a34bb25e6870c261c894551b7/src/tests/mesos.cpp#L263
> despite that `cgroups::hierarchy(subsystems)` which reads from
> `/proc/mounts` returns None.
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