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From "Weiwei Yang (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-11830) Ozone: Datanode needs to re-register to SCM if SCM is restarted
Date Tue, 16 May 2017 10:28:04 GMT
Weiwei Yang created HDFS-11830:
----------------------------------

             Summary: Ozone: Datanode needs to re-register to SCM if SCM is restarted
                 Key: HDFS-11830
                 URL: https://issues.apache.org/jira/browse/HDFS-11830
             Project: Hadoop HDFS
          Issue Type: Sub-task
          Components: ozone
            Reporter: Weiwei Yang
            Assignee: Weiwei Yang


Problem description:

# Start NN, DN, SCM
# Restart SCM and will see following warnings in SCM log
17/05/02 00:47:08 WARN node.SCMNodeManager: SCM receive heartbeat from unregistered datanode

Datanode could not re-establish communication with SCM afterwards. Propose to fix this by
adding a new command in HB handling telling datanode to re-register with SCM. Datanode once
received this command transits to REGISTER state again to proceed.



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