nkeywal created HDFS-3704:
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             Summary: In the DFSClient, Add the node to the dead list when the 
ipc.Client calls fails
                 Key: HDFS-3704
                 URL: https://issues.apache.org/jira/browse/HDFS-3704
             Project: Hadoop HDFS
          Issue Type: Improvement
    Affects Versions: 2.0.0-alpha, 1.0.3
            Reporter: nkeywal
            Priority: Minor


The DFSCLient maintains a list of dead node per input steam. When creating this 
DFSInputStream, it may connect to one of the nodes to check final block size. 
If this call fail, this datanode should be put in the dead nodes list to save 
time. If not it will be retried for the block transfer during the read, and 
we're likely to get a timeout.


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