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https://issues.apache.org/jira/browse/HDFS-6750?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Colin Patrick McCabe updated HDFS-6750:
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Attachment: HDFS-6750.001.patch
> The DataNode should use its shared memory segment to mark short-circuit
> replicas that have been unlinked as stale
> -----------------------------------------------------------------------------------------------------------------
>
> Key: HDFS-6750
> URL: https://issues.apache.org/jira/browse/HDFS-6750
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: datanode, hdfs-client
> Affects Versions: 2.4.0
> Reporter: Colin Patrick McCabe
> Assignee: Colin Patrick McCabe
> Attachments: HDFS-6750.001.patch
>
>
> The DataNode should mark short-circuit replicas that have been unlinked as
> stale. This would prevent replicas that had been deleted from lingering in
> the DFSClient cache. (At least for DFSClients that use shared memory; those
> without shared memory will still have to use the timeout method.)
> Note that when a replica is stale, any ongoing reads or mmaps can still
> complete. But stale replicas will be removed from the DFSClient cache once
> they're no longer in use.
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