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From "zhihai xu (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-12056) DiskChecker#checkDirs should check null pointer for the return value from File#listFiles to avoid NPE.
Date Tue, 02 Jun 2015 21:20:49 GMT
zhihai xu created HADOOP-12056:
----------------------------------

             Summary: DiskChecker#checkDirs should check null pointer for the return value
from File#listFiles to avoid NPE.
                 Key: HADOOP-12056
                 URL: https://issues.apache.org/jira/browse/HADOOP-12056
             Project: Hadoop Common
          Issue Type: Bug
          Components: util
    Affects Versions: 2.7.0
            Reporter: zhihai xu
            Assignee: zhihai xu


DiskChecker#checkDirs should check null pointer for the return value from File#listFiles.
Based on the document for File#listFiles at https://docs.oracle.com/javase/7/docs/api/java/io/File.html#listFiles()
:
{code}
Returns null if an I/O error occurs.
{code}
So it will be good to check null pointer and throw DiskErrorException if it is null.



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