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From "Hitesh Shah (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-3703) ResourceManager should provide node lists in JMX output
Date Tue, 24 Jan 2012 19:24:42 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-3703?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13192409#comment-13192409
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Hitesh Shah commented on MAPREDUCE-3703:
----------------------------------------

@Eric, 1 MB worth of data being pulled may be an issue depending on where the call is being
made from. If most of the use cases are from more or less within the same network/colo, then
latency may not be that big a factor ( unless someone hits the jmx url too often ). In any
case, if no one has mentioned anything with respect to the jmx data size for the 0.20 branch,
I guess there is no harm in adding it also to .23. 

Minor comments on the json keys:
  - could you change UsedMemory and AvailableMemory to UsedMemoryMB and AvailableMemoryMB.

  - Also, it would be good if the json output could be changed to have the keys match the
elements used in the webservice apis.



                
> ResourceManager should provide node lists in JMX output
> -------------------------------------------------------
>
>                 Key: MAPREDUCE-3703
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3703
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: resourcemanager
>    Affects Versions: 0.23.1
>            Reporter: Eric Payne
>            Assignee: Eric Payne
>            Priority: Critical
>
> In 0.20.*, the JMX UI for the JobTracker (http://<JobTrackerHost>:50030/jmx) showed
lists of Live and BlackListed Nodes under the JobTrackerInfo section.
> In 0.23, the ResourceManager JMX UI shows the number of active, decommissioned, lost,
unhealthy, and rebooted nodes under the ClusterMetrics section, but does not give the list
of nodes.
> At least the list of active nodes is needed in JSON format.

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