Chris Nauroth created HDFS-7604:
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             Summary: Track and display failed DataNode storage locations in 
NameNode.
                 Key: HDFS-7604
                 URL: https://issues.apache.org/jira/browse/HDFS-7604
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: datanode, namenode
            Reporter: Chris Nauroth
            Assignee: Chris Nauroth


During heartbeats, the DataNode can report a list of its storage locations that 
have been taken out of service due to failure (such as due to a bad disk or a 
permissions problem).  The NameNode can track these failed storage locations 
and then report them in JMX and the NameNode web UI.



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