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https://issues.apache.org/jira/browse/HDFS-6990?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xiaoyu Yao updated HDFS-6990:
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Attachment: HDFS-6990.2.patch
Update the patch with SCR reader counter check and the eviction validation.
> Add unit test for evict/delete RAM_DISK block with open handle
> --------------------------------------------------------------
>
> Key: HDFS-6990
> URL: https://issues.apache.org/jira/browse/HDFS-6990
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: datanode
> Reporter: Xiaoyu Yao
> Assignee: Xiaoyu Yao
> Attachments: HDFS-6990.0.patch, HDFS-6990.1.patch, HDFS-6990.2.patch
>
>
> This is to verify:
> * Evict RAM_DISK block with open handle should fall back to DISK.
> * Delete RAM_DISK block (persisted) with open handle should mark the block to
> be deleted upon handle close.
> Simply open handle to file in DFS name space won't work as expected. We need
> a local FS file handle to the block file. The only meaningful case is for
> Short Circuit Read. This JIRA is to validate/enable the two cases with SCR
> enabled MiniDFSCluster.
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