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From "Josh Elser (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-5856) DataNode.checkDiskError might throw NPE
Date Thu, 30 Jan 2014 18:30:12 GMT
Josh Elser created HDFS-5856:
--------------------------------

             Summary: DataNode.checkDiskError might throw NPE
                 Key: HDFS-5856
                 URL: https://issues.apache.org/jira/browse/HDFS-5856
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: datanode
    Affects Versions: 2.2.0
            Reporter: Josh Elser
            Assignee: Josh Elser
            Priority: Minor
             Fix For: 3.0.0


Running a small 2.2.0 cluster with a heavy workload. I noticed in the DataNode log that when
faced with network exceptions, I would sometimes get a NullPointerException from checkDiskError.

Looking at the code, if the Exception that is handed to checkDiskError contains a null message,
the checks that try to identify if the Exception is network-related will throw a NPE.



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