Daryn Sharp created HDFS-4379:
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Summary: DN block reports should include a sequence number
Key: HDFS-4379
URL: https://issues.apache.org/jira/browse/HDFS-4379
Project: Hadoop HDFS
Issue Type: Improvement
Components: datanode, namenode
Affects Versions: 2.0.0-alpha, 3.0.0
Reporter: Daryn Sharp
Block reports should include a monotonically increasing sequence number. If
the sequence starts from zero, this will aid the NN in being able to
distinguish a DN restart (seqNum == 0) versus a re-registration after network
interruption (seqNum != 0). The NN may also use it to identify and skip
already processed block reports.
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