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From "Yan Xu (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MESOS-6422) cgroups_tests not correctly tearing down testing hierarchies
Date Wed, 19 Oct 2016 22:41:59 GMT
Yan Xu created MESOS-6422:
-----------------------------

             Summary: cgroups_tests not correctly tearing down testing hierarchies
                 Key: MESOS-6422
                 URL: https://issues.apache.org/jira/browse/MESOS-6422
             Project: Mesos
          Issue Type: Bug
          Components: containerization
            Reporter: Yan Xu


We currently do the following in [CgroupsTest::TearDownTestCase()|https://github.com/apache/mesos/blob/5e850a362edbf494921fedff4037cf4b53088c10/src/tests/containerizer/cgroups_tests.cpp#L83]

{code:title=}
static void TearDownTestCase()
{
  AWAIT_READY(cgroups::cleanup(TEST_CGROUPS_HIERARCHY));
}
{code}

One of its derived test {{CgroupsNoHierarchyTest}} treats {TEST_CGROUPS_HIERARCHY} as a hierarchy
so it's able to clean it up as a hierarchy.

However another derived test {{CgroupsAnyHierarchyTest}} would create new hierarchies (if
none is available) using {{TEST_CGROUPS_HIERARCHY}} as a parent directory (i.e., base hierarchy)
and not as a hierarchy, so when it's time to clean up, it fails:

{noformat:title=}
[       OK ] CgroupsAnyHierarchyTest.ROOT_CGROUPS_Subsystems (1 ms)
../../src/tests/containerizer/cgroups_tests.cpp:88: Failure
(cgroups::cleanup(TEST_CGROUPS_HIERARCHY)).failure(): Operation not permitted
{noformat}



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