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From "Arpit Agarwal (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-6991) Notify NN of evicted block before deleting it from RAM disk
Date Wed, 03 Sep 2014 05:56:52 GMT
Arpit Agarwal created HDFS-6991:
-----------------------------------

             Summary: Notify NN of evicted block before deleting it from RAM disk
                 Key: HDFS-6991
                 URL: https://issues.apache.org/jira/browse/HDFS-6991
             Project: Hadoop HDFS
          Issue Type: Sub-task
          Components: datanode
    Affects Versions: HDFS-6581
            Reporter: Arpit Agarwal
            Assignee: Arpit Agarwal


When evicting a block from RAM disk to persistent storage, the DN should notify the NN of
the persistent replica before deleting the replica from RAM disk. Else there can be a window
of time during which the block is considered 'missing' by the NN.

Found by [~xyao] via HDFS-6950.



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