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From "Sidharta Seethana (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4309) Add debug information to application logs when a container fails
Date Thu, 03 Dec 2015 18:14:11 GMT

    [ https://issues.apache.org/jira/browse/YARN-4309?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15038231#comment-15038231
] 

Sidharta Seethana commented on YARN-4309:
-----------------------------------------

Could you please edit the comment mentioned above to make it a bit clearer? Maybe include
a note, both in yarn-default.xml 's description of the config flag as well as code that symlinks
could be followed outside the current directory?

Also, there seem to be a few spurious empty lines introduced in DockerContainerExecutor. Apart
from this, the latest patch seems good to me.



> 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
>
>
> 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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