zhihai xu created HADOOP-12056:
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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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