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Posted to hdfs-dev@hadoop.apache.org by "Colin Patrick McCabe (JIRA)" <ji...@apache.org> on 2014/07/25 02:30:38 UTC
[jira] [Created] (HDFS-6750) The DataNode should use its shared
memory segment to mark short-circuit replicas that have been unlinked as
stale
Colin Patrick McCabe created HDFS-6750:
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Summary: 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
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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