Shane Kumpf commented on YARN-7916:

I'll put up a patch after YARN-7914 wraps up, since the two will conflict.

> 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
>            Priority: Major
> 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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