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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-8549) Abort the balancer if an upgrade is in progress
Date Thu, 11 Jun 2015 15:32:03 GMT

    [ https://issues.apache.org/jira/browse/HDFS-8549?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14582087#comment-14582087
] 

Hudson commented on HDFS-8549:
------------------------------

FAILURE: Integrated in Hadoop-Mapreduce-trunk #2171 (See [https://builds.apache.org/job/Hadoop-Mapreduce-trunk/2171/])
HDFS-8549. Abort the balancer if an upgrade is in progress. (wang: rev a7a7768341f1b7d3a8f2686e2f4d00c57f2e1d4f)
* hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/balancer/ExitStatus.java
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
* hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/balancer/Balancer.java
* hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/balancer/NameNodeConnector.java
* hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/balancer/TestBalancer.java


> Abort the balancer if an upgrade is in progress
> -----------------------------------------------
>
>                 Key: HDFS-8549
>                 URL: https://issues.apache.org/jira/browse/HDFS-8549
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: balancer & mover
>    Affects Versions: 2.7.0
>            Reporter: Andrew Wang
>            Assignee: Andrew Wang
>             Fix For: 2.8.0
>
>         Attachments: HDFS-8549.001.patch, HDFS-8549.002.patch, HDFS-8549.003.patch, HDFS-8549.004.patch
>
>
> Running the balancer during an ongoing upgrade has a negative affect, since DNs do not
actually delete blocks. This means the balancer is making lots of extra replicas and not actually
reducing the disk utilization of over-utilized nodes.



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