[jira] [Created] (YARN-2707) Potential null dereference in FSDownload

["Ted Yu (JIRA)" <ji...@apache.org>]

Ted Yu created YARN-2707:
----------------------------

             Summary: Potential null dereference in FSDownload
                 Key: YARN-2707
                 URL: https://issues.apache.org/jira/browse/YARN-2707
             Project: Hadoop YARN
          Issue Type: Bug
            Reporter: Ted Yu
            Priority: Minor


Here is related code in call():
{code}
      Pattern pattern = null;
      String p = resource.getPattern();
      if (p != null) {
        pattern = Pattern.compile(p);
      }
      unpack(new File(dTmp.toUri()), new File(dFinal.toUri()), pattern);
{code}
In unpack():
{code}
        RunJar.unJar(localrsrc, dst, pattern);
{code}
unJar() would dereference the pattern without checking whether it is null.



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