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From "Shane Kumpf (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-7916) Remove call to docker logs on failure in container-executor
Date Fri, 09 Feb 2018 21:40:00 GMT
Shane Kumpf created YARN-7916:

             Summary: Remove call to docker logs on failure in container-executor
                 Key: YARN-7916
                 URL: https://issues.apache.org/jira/browse/YARN-7916
             Project: Hadoop YARN
          Issue Type: Sub-task
            Reporter: Shane Kumpf

If a Docker container fails with a non-zero exit code, container-executor attempts to run
a {{docker logs --tail=250 container_name}} to provide more details on why the container
failed. While the idea is good, the current implementation will fail for most containers as
they are leveraging a launch script whose output will be redirected to a file. The {{--tail}} option
throws an error if no log output is available for the container, resulting in the docker logs
command returning rc=1 in most cases.

I propose we remove this code from container-executor. Alternative approaches to handle logging
can be explored as part of supporting an image's entrypoint.

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