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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