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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-6300) Prevent multiple balancers from running simultaneously
Date Wed, 13 May 2015 16:05:04 GMT

    [ https://issues.apache.org/jira/browse/HDFS-6300?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14542157#comment-14542157
] 

Hudson commented on HDFS-6300:
------------------------------

FAILURE: Integrated in Hadoop-Mapreduce-trunk #2142 (See [https://builds.apache.org/job/Hadoop-Mapreduce-trunk/2142/])
HDFS-6300. Prevent multiple balancers from running simultaneously (Contributed by Rakesh R)
(vinayakumarb: rev 065d8f2a34296b566e7ca541a284f7991212f14c)
* hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/balancer/TestBalancer.java
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
* hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/balancer/NameNodeConnector.java


> Prevent multiple balancers from running simultaneously
> ------------------------------------------------------
>
>                 Key: HDFS-6300
>                 URL: https://issues.apache.org/jira/browse/HDFS-6300
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: balancer & mover
>            Reporter: Rakesh R
>            Assignee: Rakesh R
>            Priority: Critical
>             Fix For: 2.7.1
>
>         Attachments: HDFS-6300-001.patch, HDFS-6300-002.patch, HDFS-6300-003.patch, HDFS-6300-004.patch,
HDFS-6300-005.patch, HDFS-6300-006.patch, HDFS-6300.patch
>
>
> Javadoc of "Balancer.java" says, it will not allow to run second balancer if the first
one is in progress. But I've noticed multiple can run together and balancer.id implementation
is not safe guarding.
> {code}
>  * <li>Another balancer is running. Exiting...
> {code}



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