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From "Naganarasimha G R (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-2934) Improve handling of container's stderr
Date Thu, 17 Dec 2015 09:47:46 GMT

    [ https://issues.apache.org/jira/browse/YARN-2934?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15061805#comment-15061805

Naganarasimha G R commented on YARN-2934:

bq. Simple globs I was suggesting already cover even AppMaster.stderr.
Yep i agree i too mentioned the same in my earlier comment to ??emphasizing different cases
here though it has stderr?? , what i was trying to point there was app developers can give
a name of file in mixed cases (like *stdErr,*sysLog) and it cant be enforced by yarn. so it
would be difficult for admin to determine and give for all kinds of app being run. 

bq. 99.9% of YARN users will never change this conf.
Definitely this feature is so rare that admin is going to configure repeatedly but my intention
is to just make admin's work lil more easy. 

If you still weigh *code resuse* as more important than to make *admin config multiple patterns*
of the log filename then i will update the patch accordingly,  waiting for your feedback.

bq. In ContainerLaunch#getErrorLogTail get rid of .. null check ...
Agree, will correct in next patch long with the test case failure

> Improve handling of container's stderr 
> ---------------------------------------
>                 Key: YARN-2934
>                 URL: https://issues.apache.org/jira/browse/YARN-2934
>             Project: Hadoop YARN
>          Issue Type: Improvement
>            Reporter: Gera Shegalov
>            Assignee: Naganarasimha G R
>            Priority: Critical
>         Attachments: YARN-2934.v1.001.patch, YARN-2934.v1.002.patch, YARN-2934.v1.003.patch,
YARN-2934.v1.004.patch, YARN-2934.v1.005.patch, YARN-2934.v1.006.patch, YARN-2934.v1.007.patch
> Most YARN applications redirect stderr to some file. That's why when container launch
fails with {{ExitCodeException}} the message is empty.

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