Jing Zhao created HDFS-5020:
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Summary: Make DatanodeProtocol#blockReceivedAndDeleted idempotent
Key: HDFS-5020
URL: https://issues.apache.org/jira/browse/HDFS-5020
Project: Hadoop HDFS
Issue Type: Improvement
Affects Versions: 3.0.0
Reporter: Jing Zhao
Assignee: Jing Zhao
Currently DatanodeProtocol#blockReceivedAndDeleted is not idempotent because
pending replication maps in NN only tracks the number of the pending replicas,
and a retry request can cause the pending number decreased more than once. We
can make blockReceivedAndDeleted idempotent by tracking corresponding datanodes
in the pending replication map.
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