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From "Oleg Nechiporenko (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AMBARI-2298) YARN/MR2 do not start after reconfiguring
Date Thu, 06 Jun 2013 12:36:22 GMT

    [ https://issues.apache.org/jira/browse/AMBARI-2298?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13676962#comment-13676962
] 

Oleg Nechiporenko commented on AMBARI-2298:
-------------------------------------------

+1 for the patch.
                
> YARN/MR2 do not start after reconfiguring
> -----------------------------------------
>
>                 Key: AMBARI-2298
>                 URL: https://issues.apache.org/jira/browse/AMBARI-2298
>             Project: Ambari
>          Issue Type: Bug
>          Components: client
>    Affects Versions: 1.4.0
>            Reporter: Andrii Tkach
>            Assignee: Andrii Tkach
>            Priority: Critical
>             Fix For: 1.4.0
>
>         Attachments: AMBARI-2298_branch-1.4.0.patch
>
>
> After successfully installing a cluster, I saved YARN configs (changed only 1 property).
YARN service would not start with ResourceManager saying it cannot bind to port.
> Turns out that certain properties in {{yarn-site.xml}} were set to null value.
> {noformat}
> "yarn.resourcemanager.admin.address" : "null",
> "yarn.resourcemanager.resource-tracker.address" : "null",
> "yarn.resourcemanager.scheduler.address" : "null",
> "yarn.resourcemanager.address" : "null",
> "yarn.log.server.url" : "null",
> {noformat}
> Similar problem with MR2 also. The {{mapred-site.xml}} had 19 properties which were null.
> {noformat}
> "mapred.jobtracker.taskScheduler" : "null",
> "mapred.tasktracker.map.tasks.maximum" : "null",
> "mapred.hosts.exclude" : "null",
> ....
> {noformat}

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