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From "Chris Nauroth (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-7382) DataNode in secure mode may throw NullPointerException if client connects before DataNode registers itself with NameNode.
Date Sat, 08 Nov 2014 22:19:33 GMT
Chris Nauroth created HDFS-7382:
-----------------------------------

             Summary: DataNode in secure mode may throw NullPointerException if client connects
before DataNode registers itself with NameNode.
                 Key: HDFS-7382
                 URL: https://issues.apache.org/jira/browse/HDFS-7382
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: datanode
            Reporter: Chris Nauroth
            Assignee: Chris Nauroth
            Priority: Minor


{{SaslDataTransferServer#receive}} needs to check if the DataNode is listening on a privileged
port.  It does this by checking the address from the {{DatanodeID}}.  However, there is a
window of time when this will be {{null}}.  If a client is still holding a {{LocatedBlock}}
that references that DataNode and chooses to connect, then there is a risk of getting a {{NullPointerException}}.



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