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https://issues.apache.org/jira/browse/HDFS-9761?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15135294#comment-15135294
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Hudson commented on HDFS-9761:
------------------------------
FAILURE: Integrated in Hadoop-trunk-Commit #9251 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/9251/])
HDFS-9761. Rebalancer sleeps too long between iterations. Contributed by
(cnauroth: rev c6497949e866594050153b953a85c0a1db59d2f8)
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/balancer/Balancer.java
> Rebalancer sleeps too long between iterations
> ---------------------------------------------
>
> Key: HDFS-9761
> URL: https://issues.apache.org/jira/browse/HDFS-9761
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: balancer & mover
> Reporter: Adrian Bridgett
> Assignee: Mingliang Liu
> Priority: Blocker
> Fix For: 2.8.0
>
> Attachments: HDFS-9761.000.patch
>
>
> Whilst reading the code to try and determine why I'm seeing bad performance I
> think I've spotted an inadvertent move of a sleep() to inside a for loop.
> This means that instead of sleeping once per iteration the balance is
> sleeping once per namenode per iteration. If I've done my maths correctly
> the sleep time default is 18seconds so this is a nice little speedup for HA
> clusters.
> Commit d31a41c35927f02f2fb40d19380b5df4bb2b6d57 moved the sleep in
> org/apache/hadoop/hdfs/server/balancer/Balancer.java:run()
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