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From "Vinayakumar B (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-6247) Avoid timeouts for replaceBlock() call by sending intermediate responses to Balancer
Date Tue, 15 Apr 2014 17:06:21 GMT
Vinayakumar B created HDFS-6247:
-----------------------------------

             Summary: Avoid timeouts for replaceBlock() call by sending intermediate responses
to Balancer
                 Key: HDFS-6247
                 URL: https://issues.apache.org/jira/browse/HDFS-6247
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: balancer, datanode
    Affects Versions: 2.4.0
            Reporter: Vinayakumar B
            Assignee: Vinayakumar B


Currently there is no response sent from target Datanode to Balancer for the replaceBlock()
calls.

Since the Block movement for balancing is throttled, complete block movement will take time
and this could result in timeout at Balancer, which will be trying to read the status message.
 
To Avoid this during replaceBlock() call in in progress Datanode  can send IN_PROGRESS status
messages to Balancer to avoid timeouts and treat BlockMovement as  failed.



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