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Patch looks great!

Reviews applied: [66449]

Passed command: export OS='ubuntu:14.04' BUILDTOOL='autotools' COMPILER='gcc' 
CONFIGURATION='--verbose --disable-libtool-wrappers' ENVIRONMENT='GLOG_v=1 
MESOS_VERBOSE=1'; ./support/docker-build.sh

- Mesos Reviewbot


On April 4, 2018, 3:17 p.m., Andrei Budnik wrote:
> 
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> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/66449/
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> 
> (Updated April 4, 2018, 3:17 p.m.)
> 
> 
> Review request for mesos, Alexander Rukletsov, Gilbert Song, and Jie Yu.
> 
> 
> Bugs: MESOS-8489
>     https://issues.apache.org/jira/browse/MESOS-8489
> 
> 
> Repository: mesos
> 
> 
> Description
> -------
> 
> Starting more than one agent simultaneously in tests leads to a race
> condition between a linux launcher which calls `cgroups::prepare()` for
> the first slave and `LinuxLauncherProcess::recover()` which iterates
> over cgroups hierarchy for the second slave. Therefore, `mesos/test`
> cgroup that is created to check if the kernel supports nested cgroups
> can be detected by a recovery process as they use same cgroup hierarchy
> path by default. That leads to orphan containers and causes flakiness
> of `ROOT_IsolatorFlags` test. To fix the issue, this patch adds
> termination of an agent before starting a new one.
> 
> 
> Diffs
> -----
> 
>   src/tests/containerizer/linux_capabilities_isolator_tests.cpp 
> 147f2cc09307cf8c9cf6f71d0175f8a3593c0256 
> 
> 
> Diff: https://reviews.apache.org/r/66449/diff/1/
> 
> 
> Testing
> -------
> 
> internal CI
> 
> 
> Thanks,
> 
> Andrei Budnik
> 
>

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