Vinayakumar B created HDFS-6247:
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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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