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https://issues.apache.org/jira/browse/MESOS-4711?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Alexander Rojas updated MESOS-4711:
-----------------------------------
Shepherd: Joris Van Remoortere
> Race condition in libevent poll implementation causes crash
> -----------------------------------------------------------
>
> Key: MESOS-4711
> URL: https://issues.apache.org/jira/browse/MESOS-4711
> Project: Mesos
> Issue Type: Bug
> Components: libprocess
> Affects Versions: 0.28.0
> Environment: CentOS 6.7 running in VirtualBox
> Reporter: Alexander Rojas
> Assignee: Alexander Rojas
> Labels: mesosphere
>
> The issue first arose in MESOS-3271, but can be reproduced every time by
> using the mentioned environment and running:
> {noformat}
> sudo ./bin/mesos-tests.sh
> --gtest_filter="MemoryPressureMesosTest.CGROUPS_ROOT_SlaveRecovery"
> --gtest_repeat=1000
> {noformat}
> The problem can be traced back to
> [{{libevent_poll.cpp}}|https://github.com/apache/mesos/blob/3539b7a0e15b594148308319bf052d28b1429b98/3rdparty/libprocess/src/libevent_poll.cpp].
> If the event is triggered and the the future associated with the event is
> discarded, the situation arises in which
> [{{pollCallback()}}|https://github.com/apache/mesos/blob/3539b7a0e15b594148308319bf052d28b1429b98/3rdparty/libprocess/src/libevent_poll.cpp#L33]
> starts executing just early enough to finish before
> [{{pollDiscard()}}|https://github.com/apache/mesos/blob/3539b7a0e15b594148308319bf052d28b1429b98/3rdparty/libprocess/src/libevent_poll.cpp#L53]
> executes. If that happens, {{pollCallback()}} deletes the poll object and
> {{pollDiscard()}} is left with a dangling pointer which crashes when it
> executes the line {{event_active(ev, EV_READ, 0);}}.
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