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https://issues.apache.org/jira/browse/YARN-2701?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14193228#comment-14193228
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Hudson commented on YARN-2701:
------------------------------

FAILURE: Integrated in Hadoop-Mapreduce-trunk #1944 (See 
[https://builds.apache.org/job/Hadoop-Mapreduce-trunk/1944/])
YARN-2701. Addendum patch. Potential race condition in startLocalizer when 
using LinuxContainerExecutor. Contributed by Xuan Gong (xgong: rev 
86ff28dea09037795f9a76d1712d741d04e33bfe)
* 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/impl/container-executor.h
* 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/impl/container-executor.c


> Potential race condition in startLocalizer when using LinuxContainerExecutor  
> ------------------------------------------------------------------------------
>
>                 Key: YARN-2701
>                 URL: https://issues.apache.org/jira/browse/YARN-2701
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: Xuan Gong
>            Assignee: Xuan Gong
>            Priority: Blocker
>             Fix For: 2.6.0
>
>         Attachments: YARN-2701.1.patch, YARN-2701.2.patch, YARN-2701.3.patch, 
> YARN-2701.4.patch, YARN-2701.5.patch, YARN-2701.6.patch, 
> YARN-2701.addendum.1.patch, YARN-2701.addendum.2.patch, 
> YARN-2701.addendum.3.patch, YARN-2701.addendum.4.patch
>
>
> When using LinuxContainerExecutor do startLocalizer, we are using native code 
> container-executor.c. 
> {code}
>      if (stat(npath, &sb) != 0) {
>        if (mkdir(npath, perm) != 0) {
> {code}
> We are using check and create method to create the appDir under /usercache. 
> But if there are two containers trying to do this at the same time, race 
> condition may happen.



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