[ 
https://issues.apache.org/jira/browse/YARN-2755?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14186115#comment-14186115
 ] 

Hadoop QA commented on YARN-2755:
---------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest 
attachment 
  http://issues.apache.org/jira/secure/attachment/12677456/YARN-2755.v1.patch
  against trunk revision 00b4e44.

    {color:green}+1 @author{color}.  The patch does not contain any @author 
tags.

    {color:red}-1 tests included{color}.  The patch doesn't appear to include 
any new or modified tests.
                        Please justify why no new tests are needed for this 
patch.
                        Also please list what manual steps were performed to 
verify this patch.

    {color:green}+1 javac{color}.  The applied patch does not increase the 
total number of javac compiler warnings.

    {color:green}+1 javadoc{color}.  There were no new javadoc warning messages.

    {color:green}+1 eclipse:eclipse{color}.  The patch built with 
eclipse:eclipse.

    {color:green}+1 findbugs{color}.  The patch does not introduce any new 
Findbugs (version 2.0.3) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase 
the total number of release audit warnings.

    {color:green}+1 core tests{color}.  The patch passed unit tests in 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager.

    {color:green}+1 contrib tests{color}.  The patch passed contrib unit tests.

Test results: 
https://builds.apache.org/job/PreCommit-YARN-Build/5590//testReport/
Console output: https://builds.apache.org/job/PreCommit-YARN-Build/5590//console

This message is automatically generated.

> 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
>            Priority: Critical
>         Attachments: YARN-2755.v1.patch
>
>
> 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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