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From "Wilfred Spiegelenburg (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-6510) Fix warning - procfs stat file is not in the expected format: YARN-3344 is not enough
Date Wed, 26 Apr 2017 07:30:03 GMT

    [ https://issues.apache.org/jira/browse/YARN-6510?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15984304#comment-15984304
] 

Wilfred Spiegelenburg commented on YARN-6510:
---------------------------------------------

There only seems to be a maximum limit on the length of the name (maximum 16 characters, including
the ending null) in the underlying structures in the OS. Nothing stops an empty name at the
OS level. We should thus be able to handle the empty name even if it is not a really useful
case to support.

> Fix warning - procfs stat file is not in the expected format: YARN-3344 is not enough
> -------------------------------------------------------------------------------------
>
>                 Key: YARN-6510
>                 URL: https://issues.apache.org/jira/browse/YARN-6510
>             Project: Hadoop YARN
>          Issue Type: Bug
>    Affects Versions: 2.8.0, 3.0.0-alpha2
>            Reporter: Wilfred Spiegelenburg
>            Assignee: Wilfred Spiegelenburg
>         Attachments: YARN-6510.01.patch
>
>
> Even with the fix for YARN-3344 we still have issues with the procfs format.
> This is the case that is causing issues:
> {code}
> [user@nm1 ~]$ cat /proc/2406/stat
> 2406 (ib_fmr(mlx4_0)) S 2 0 0 0 -1 2149613632 0 0 0 0 166 126908 0 0 20 0 1 0 4284 0
0 18446744073709551615 0 0 0 0 0 0 0 2147483647 0 18446744073709551615 0 0 17 6 0 0 0 0 0
> {code}
> We do not handle the parenthesis in the name which causes the pattern matching to fail



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