Ahmed Hussein updated HDFS-15119:
    Attachment: HDFS-15119.003.patch
        Status: Patch Available  (was: Open)

> 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
>            Priority: Minor
>         Attachments: HDFS-15119.001.patch, HDFS-15119.002.patch, 
> HDFS-15119.003.patch
> 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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