Shane Kumpf created YARN-6305:
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Summary: Improve signaling of short lived containers
Key: YARN-6305
URL: https://issues.apache.org/jira/browse/YARN-6305
Project: Hadoop YARN
Issue Type: Sub-task
Components: yarn
Reporter: Shane Kumpf
Currently it is possible for containers to leak and remain in an exited state
if a docker container is not fully started before being killed. Depending on
the selected Docker storage driver, the lower bound on starting a container can
be as much as three seconds (using {{docker run}}). If an implicit image pull
occurs, this could be much longer.
When a container is not fully started, the PID is not available yet. As a
result, {{ContainerLaunch#cleanUpContainer}} will not signal the container as
it relies on the PID. The PID is not required for docker client operations, so
allowing the signaling to occur anyway appears to be appropriate.
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