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From "Hongyuan Li (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-14631) Distcp should add a default AtomicWorkPath properties when using atomic
Date Fri, 07 Jul 2017 14:42:00 GMT
Hongyuan Li created HADOOP-14631:
------------------------------------

             Summary: Distcp should add a default  AtomicWorkPath properties when using atomic
                 Key: HADOOP-14631
                 URL: https://issues.apache.org/jira/browse/HADOOP-14631
             Project: Hadoop Common
          Issue Type: Bug
            Reporter: Hongyuan Li


Distcp should add a default  AtomicWorkPath properties when using atomic

{{Distcp}}#{{configureOutputFormat}} using code below to generate atomic work path

{code}
    if (context.shouldAtomicCommit()) {
      Path workDir = context.getAtomicWorkPath();
      if (workDir == null) {
        workDir = targetPath.getParent();
      }
      workDir = new Path(workDir, WIP_PREFIX + targetPath.getName()
                                + rand.nextInt());
[code}

When atomic is set and tAtomicWorkPath == null, distcp will get the parent of current WorkDir.
In this case, if {{workdir}} is {{"/"}}, the parent will be {{null}}, wich means 
{{ workDir = new Path(workDir, WIP_PREFIX + targetPath.getName() + rand.nextInt());}} will
throw a nullpoint exception.



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