Arpit Agarwal created HDFS-6991:
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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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