[jira] [Updated] (YARN-2755) NM fails to clean up usercache_DEL_ dirs after YARN-661

["Siqi Li (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/YARN-2755?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Siqi Li updated YARN-2755:
--------------------------
    Description: 
When NM restarts frequently due to some reason, a large number of directories like these left in /data/disk$num/yarn/local/:
/data/disk1/yarn/local/usercache_DEL_1414372756105
/data/disk1/yarn/local/usercache_DEL_1413557901696
/data/disk1/yarn/local/usercache_DEL_1413657004894
/data/disk1/yarn/local/usercache_DEL_1413675321860
/data/disk1/yarn/local/usercache_DEL_1414093167936
/data/disk1/yarn/local/usercache_DEL_1413565841271
These directories are empty, but take up 100M+ due to the number of them. There were 38714 on the machine I looked at per data disk.

It appears to be a regression introduced by YARN-661

> NM fails to clean up usercache_DEL_<timestamp> dirs after YARN-661
> ------------------------------------------------------------------
>
>                 Key: YARN-2755
>                 URL: https://issues.apache.org/jira/browse/YARN-2755
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: Siqi Li
>            Assignee: Siqi Li
>
> When NM restarts frequently due to some reason, a large number of directories like these left in /data/disk$num/yarn/local/:
> /data/disk1/yarn/local/usercache_DEL_1414372756105
> /data/disk1/yarn/local/usercache_DEL_1413557901696
> /data/disk1/yarn/local/usercache_DEL_1413657004894
> /data/disk1/yarn/local/usercache_DEL_1413675321860
> /data/disk1/yarn/local/usercache_DEL_1414093167936
> /data/disk1/yarn/local/usercache_DEL_1413565841271
> These directories are empty, but take up 100M+ due to the number of them. There were 38714 on the machine I looked at per data disk.
> It appears to be a regression introduced by YARN-661



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