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https://issues.apache.org/jira/browse/MESOS-7506?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16212605#comment-16212605
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Andrei Budnik commented on MESOS-7506:
--------------------------------------
Bug has been reproduced with extra debug logs
(SlaveTest.ShutdownUnregisteredExecutor):
{code}
I1020 12:07:20.266032 9274 containerizer.cpp:2220] Destroying container
7f9cb5a6-26c9-4010-ace9-b9cb3e065542 in RUNNING state
I1020 12:07:20.266042 9274 containerizer.cpp:2784] Transitioning the state of
container 7f9cb5a6-26c9-4010-ace9-b9cb3e065542 from RUNNING to DESTROYING
I1020 12:07:20.266175 9274 linux_launcher.cpp:514] Asked to destroy container
7f9cb5a6-26c9-4010-ace9-b9cb3e065542
I1020 12:07:20.266717 9274 linux_launcher.cpp:560] Using freezer to destroy
cgroup mesos/7f9cb5a6-26c9-4010-ace9-b9cb3e065542
I1020 12:07:20.268649 9274 cgroups.cpp:1562] TasksKiller::freeze:
/sys/fs/cgroup/freezer/mesos/7f9cb5a6-26c9-4010-ace9-b9cb3e065542
I1020 12:07:20.268756 9274 cgroups.cpp:3083] Freezing cgroup
/sys/fs/cgroup/freezer/mesos/7f9cb5a6-26c9-4010-ace9-b9cb3e065542
I1020 12:07:20.269533 9276 cgroups.cpp:1397] Freezer::freeze:
/sys/fs/cgroup/freezer/mesos/7f9cb5a6-26c9-4010-ace9-b9cb3e065542
I1020 12:07:20.270486 9276 cgroups.cpp:1422] Freezer::freeze 2:
/sys/fs/cgroup/freezer/mesos/7f9cb5a6-26c9-4010-ace9-b9cb3e065542: FREEZING
I1020 12:07:20.270725 9272 cgroups.cpp:1397] Freezer::freeze:
/sys/fs/cgroup/freezer/mesos/7f9cb5a6-26c9-4010-ace9-b9cb3e065542
I1020 12:07:20.271625 9272 cgroups.cpp:1415] Successfully froze cgroup
/sys/fs/cgroup/freezer/mesos/7f9cb5a6-26c9-4010-ace9-b9cb3e065542 after 1secs
I1020 12:07:20.271724 9272 hierarchical.cpp:1488] Performed allocation for 1
agents in 18541ns
I1020 12:07:20.271767 9272 cgroups.cpp:1573] TasksKiller::kill:
/sys/fs/cgroup/freezer/mesos/7f9cb5a6-26c9-4010-ace9-b9cb3e065542
I1020 12:07:20.273386 9272 cgroups.cpp:1596] TasksKiller::thaw:
/sys/fs/cgroup/freezer/mesos/7f9cb5a6-26c9-4010-ace9-b9cb3e065542
I1020 12:07:20.273486 9272 cgroups.cpp:3101] Thawing cgroup
/sys/fs/cgroup/freezer/mesos/7f9cb5a6-26c9-4010-ace9-b9cb3e065542
I1020 12:07:20.274129 9272 cgroups.cpp:1431] Freezer::thaw:
/sys/fs/cgroup/freezer/mesos/7f9cb5a6-26c9-4010-ace9-b9cb3e065542
I1020 12:07:20.276964 9272 cgroups.cpp:1448] Successfully thawed cgroup
/sys/fs/cgroup/freezer/mesos/7f9cb5a6-26c9-4010-ace9-b9cb3e065542 after 0ns
I1020 12:07:20.277225 9277 cgroups.cpp:1602] TasksKiller::reap:
/sys/fs/cgroup/freezer/mesos/7f9cb5a6-26c9-4010-ace9-b9cb3e065542
I1020 12:07:20.277613 9279 hierarchical.cpp:1488] Performed allocation for 1
agents in 17680ns
I1020 12:07:20.277772 9279 containerizer.cpp:2671] Container
7f9cb5a6-26c9-4010-ace9-b9cb3e065542 has exited
{code}
{{TasksKiller::finished}} wasn't called, while {{TasksKiller::reap}} was
called. So, I assume there is a race condition in {{TasksKiller::kill}}.
Probably, {{cgroups::processes()}} called in {{TasksKiller::kill}} returns a
list L1 which differs from a list L2 returned by the same function in
{{cgroups::kill}}.
> Multiple tests leave orphan containers.
> ---------------------------------------
>
> Key: MESOS-7506
> URL: https://issues.apache.org/jira/browse/MESOS-7506
> Project: Mesos
> Issue Type: Bug
> Components: containerization
> Environment: Ubuntu 16.04
> Fedora 23
> other Linux distros
> Reporter: Alexander Rukletsov
> Assignee: Andrei Budnik
> Labels: containerizer, flaky-test, mesosphere
>
> I've observed a number of flaky tests that leave orphan containers upon
> cleanup. A typical log looks like this:
> {noformat}
> ../../src/tests/cluster.cpp:580: Failure
> Value of: containers->empty()
> Actual: false
> Expected: true
> Failed to destroy containers: { da3e8aa8-98e7-4e72-a8fd-5d0bae960014 }
> {noformat}
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