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From "Vinayakumar B (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-11738) hdged pread takes more time when block moved from initial locations
Date Tue, 02 May 2017 11:01:04 GMT
Vinayakumar B created HDFS-11738:
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             Summary: hdged pread takes more time when block moved from initial locations
                 Key: HDFS-11738
                 URL: https://issues.apache.org/jira/browse/HDFS-11738
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: hdfs-client
            Reporter: Vinayakumar B
            Assignee: Vinayakumar B


Scenario : 
Same as HDFS-11708.

During Hedge read, 
1. First two locations fails to read the data in hedged mode.
2. chooseData refetches locations and adds a future to read from DN3.
3. after adding future to DN3, main thread goes for refetching locations in loop and stucks
there till all 3  retries to fetch locations exhausted, which consumes ~20 seconds with exponential
retry time.



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