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Posted to hdfs-dev@hadoop.apache.org by "Jing Zhao (JIRA)" <ji...@apache.org> on 2013/07/23 01:46:51 UTC

[jira] [Created] (HDFS-5020) Make DatanodeProtocol#blockReceivedAndDeleted idempotent

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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