hadoop-hdfs-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Vinayakumar B (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-6300) Shouldn't allows to run multiple balancer simultaneously
Date Fri, 08 May 2015 06:39:01 GMT

    [ https://issues.apache.org/jira/browse/HDFS-6300?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14533960#comment-14533960
] 

Vinayakumar B commented on HDFS-6300:
-------------------------------------

Expectation of create with overwrite on open file was changed in HDFS-3755. Before this, NN
used to throw AlreadyBeingCreatedException. So there was no problem.

Source changes looks good. 
In Test, {{balancerStarted.countDown();}} should be called after {{runBalancer(..)}} right?


> Shouldn't allows to run multiple balancer 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
>              Labels: BB2015-05-RFC
>         Attachments: HDFS-6300-001.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}



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

Mime
View raw message