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https://issues.apache.org/jira/browse/YARN-4309?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15045907#comment-15045907
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Wangda Tan commented on YARN-4309:
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[~vvasudev].
bq. The echo will end up being captured by the ContainerExecutor and logged in
the NM log. Any particular reason you want to print this line?
I meant to print comment to the generated container_launch.sh for better
readability. Such as:
{code}
(container_launch.sh)
# Print debug information of container launch
......
# Launch container process
......
{code}
> Add debug information to application logs when a container fails
> ----------------------------------------------------------------
>
> Key: YARN-4309
> URL: https://issues.apache.org/jira/browse/YARN-4309
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: nodemanager
> Reporter: Varun Vasudev
> Assignee: Varun Vasudev
> Attachments: YARN-4309.001.patch, YARN-4309.002.patch,
> YARN-4309.003.patch, YARN-4309.004.patch, YARN-4309.005.patch,
> YARN-4309.006.patch, YARN-4309.007.patch, YARN-4309.008.patch
>
>
> Sometimes when a container fails, it can be pretty hard to figure out why it
> failed.
> My proposal is that if a container fails, we collect information about the
> container local dir and dump it into the container log dir. Ideally, I'd like
> to tar up the directory entirely, but I'm not sure of the security and space
> implications of such a approach. At the very least, we can list all the files
> in the container local dir, and dump the contents of launch_container.sh(into
> the container log dir).
> When log aggregation occurs, all this information will automatically get
> collected and make debugging such failures much easier.
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