Gilbert Song created MESOS-9191:
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Summary: Docker command executor may stuck at infinite unkillable
loop.
Key: MESOS-9191
URL: https://issues.apache.org/jira/browse/MESOS-9191
Project: Mesos
Issue Type: Bug
Components: containerization, docker
Reporter: Gilbert Song
Due to the change from https://issues.apache.org/jira/browse/MESOS-8574, the
behavior of docker command executor to discard the future of docker stop was
changed. If there is a new killTask() invoked and there is an existing docker
stop in pending state, the old one would call discard and then execute the new
one. This is ok for most of cases.
However, docker stop could take long (depends on grace period and whether the
application could handle SIGTERM). If the framework retry killTask more
frequently than grace period (depends on killpolicy API, env var, or agent
flags), then the executor may be stuck forever with unkillable tasks. Because
everytime before the docker stop finishes, the future of docker stop is
discarded by the new incoming killTask.
We should consider re-use grace period before calling discard() to a pending
docker stop future.
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