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From "Ahmed Hussein (Jira)" <j...@apache.org>
Subject [jira] [Created] (HDFS-15119) Allow expiration of cached locations in DFSInputStream
Date Mon, 13 Jan 2020 20:55:00 GMT
Ahmed Hussein created HDFS-15119:
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             Summary: Allow expiration of cached locations in DFSInputStream
                 Key: HDFS-15119
                 URL: https://issues.apache.org/jira/browse/HDFS-15119
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: dfsclient
            Reporter: Ahmed Hussein
            Assignee: Ahmed Hussein


Staleness and other transient conditions can affect reads for a long time since the block
locations may not be re-fetched. It makes sense to make cached locations to expire.
For example, we may not take advantage of local-reads since the nodes are blacklisted and
have not been updated.




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