lachisis created YARN-4382:
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Summary: Container hierarchy in cgroup may remain for ever after
the container have be terminated
Key: YARN-4382
URL: https://issues.apache.org/jira/browse/YARN-4382
Project: Hadoop YARN
Issue Type: Bug
Components: nodemanager
Affects Versions: 2.5.2
Reporter: lachisis
If we use LinuxContainerExecutor to executor the containers, this question may
happens.
In the common case, when a container run, a corresponding hierarchy will be
created in cgroup dir. And when the container terminate, the hierarchy will be
delete in some seconds(this time can be configured by
yarn.nodemanager.linux-container-executor.cgroups.delete-delay-ms).
In the code, I find that, CgroupsLCEResource send a signal to kill container
process asynchronously, and in the same time, it will try to delete the
container hierarchy in configured "delete-delay-ms" times.
But if the container process be killed for seconds which large than
"delete-delay-ms" time, the container hierarchy will remain for ever.
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