Xuan Gong created YARN-2701:

             Summary: Potential race condition in startLocalizer when using 
                 Key: YARN-2701
                 URL: https://issues.apache.org/jira/browse/YARN-2701
             Project: Hadoop YARN
          Issue Type: Bug
            Reporter: Xuan Gong
            Assignee: Xuan Gong

When using LinuxContainerExecutor do startLocalizer, we are using native code 
     if (stat(npath, &sb) != 0) {
       if (mkdir(npath, perm) != 0) {
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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