[jira] [Created] (MESOS-7915) cgroups::internal::Destroyer should not destroy nested cgroups in parallel.

["Yan Xu (JIRA)" <ji...@apache.org>]

Yan Xu created MESOS-7915:
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             Summary: cgroups::internal::Destroyer should not destroy nested cgroups in parallel.
                 Key: MESOS-7915
                 URL: https://issues.apache.org/jira/browse/MESOS-7915
             Project: Mesos
          Issue Type: Bug
          Components: cgroups
            Reporter: Yan Xu


Currently the destroyer would attempt to [kill processes in a cgroup tree in parallel|https://github.com/apache/mesos/blob/09b1625b5d83d6ade747b2cf0948c085a75f77c8/src/linux/cgroups.cpp#L1658-L1665].

However it could result in two threads trying to freeze and thaw a parent and a child cgroup concurrently and repeatedly and it's possible that neither would make progress so it will lead to the containerizer not able to destroy the container within a timeout, after which point the agent/containerizer just gave up, leaving the (partially) frozen container holding system resources (e.g., ports).



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