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From "Haibo Chen (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-8930) CGroup-based strict container memory management does not work with CGroupElasticMemoryController
Date Mon, 22 Oct 2018 19:24:00 GMT
Haibo Chen created YARN-8930:
--------------------------------

             Summary: CGroup-based strict container memory management does not work with CGroupElasticMemoryController
                 Key: YARN-8930
                 URL: https://issues.apache.org/jira/browse/YARN-8930
             Project: Hadoop YARN
          Issue Type: Bug
          Components: nodemanager
    Affects Versions: 3.2.0
            Reporter: Haibo Chen
            Assignee: Haibo Chen


When yarn.nodemanger.resource.memory.enforced is set to true with memory cgroup turned on,
(aka strict memory enforcement), containers monitor relies on the under_oom status read from
the container cgroup's memory.oom_control file.

However, when the root yarn container cgroup is under oom (e.g. when the node is overallocating
iteself), the under_oom status is set for all yarn containers regardless of whether each individual
container has run over its memory limit.

What essentially happens is that whenever the root cgroup is under oom, all yarn containers
are killed.



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