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Vinayakumar B commented on HDFS-11738: -------------------------------------- Hi [~cnauroth]/[~andrew.wang]/[~jingzhao] Can anyone review changes.. as you have worked on this part of code before. Thanks. > hedged 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 > Attachments: HDFS-11738-01.patch > > > 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. -- This message was sent by Atlassian JIRA (v6.3.15#6346) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org