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https://issues.apache.org/jira/browse/HDFS-6991?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Arpit Agarwal updated HDFS-6991:
--------------------------------
Description:
When evicting a block from RAM disk to persistent storage, the DN should
schedule an incremental block report for a 'received' replica on persistent
storage.
An additional fix
Found by [~xyao] via HDFS-6950.
was:
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.
> 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, namenode
> Affects Versions: HDFS-6581
> Reporter: Arpit Agarwal
> Assignee: Arpit Agarwal
> Attachments: HDFS-6991.01.patch, HDFS-6991.02.patch,
> HDFS-6991.03.patch
>
>
> When evicting a block from RAM disk to persistent storage, the DN should
> schedule an incremental block report for a 'received' replica on persistent
> storage.
> An additional fix
> Found by [~xyao] via HDFS-6950.
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