[
https://issues.apache.org/jira/browse/HDFS-11738?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Vinayakumar B updated HDFS-11738:
---------------------------------
Fix Version/s: 2.8.2
2.9.0
> 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
> Fix For: 2.9.0, 3.0.0-beta1, 2.8.2
>
> Attachments: HDFS-11738-01.patch, HDFS-11738-02.patch,
> HDFS-11738-03.patch, HDFS-11738-04.patch, HDFS-11738-05.patch,
> HDFS-11738-branch-2.8-committed.patch, HDFS-11738-branch-2-committed.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
(v6.4.14#64029)
---------------------------------------------------------------------
To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org
For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org
