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https://issues.apache.org/jira/browse/HDFS-11738?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16135910#comment-16135910
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Hudson commented on HDFS-11738:
-------------------------------
SUCCESS: Integrated in Jenkins build Hadoop-trunk-Commit #12220 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/12220/])
HDFS-11738. Hedged pread takes more time when block moved from initial (jzhuge:
rev b6bfb2fcb2391d51b8de97c01c1290880779132e)
* (edit)
hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/DFSClientFaultInjector.java
* (edit)
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestPread.java
* (edit)
hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/DFSInputStream.java
> 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: 3.0.0-beta1
>
> Attachments: HDFS-11738-01.patch, HDFS-11738-02.patch,
> HDFS-11738-03.patch, HDFS-11738-04.patch, HDFS-11738-05.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.
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