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Posted to common-dev@hadoop.apache.org by "Doug Cutting (JIRA)" <ji...@apache.org> on 2007/04/11 21:43:32 UTC
[jira] Assigned: (HADOOP-1238) maps_running metric is only updated
at the end of the task
[ https://issues.apache.org/jira/browse/HADOOP-1238?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Doug Cutting reassigned HADOOP-1238:
------------------------------------
Assignee: David Bowen
David, can you please look this over? Thanks!
> maps_running metric is only updated at the end of the task
> ----------------------------------------------------------
>
> Key: HADOOP-1238
> URL: https://issues.apache.org/jira/browse/HADOOP-1238
> Project: Hadoop
> Issue Type: Bug
> Components: metrics
> Affects Versions: 0.12.3
> Environment: ganglia metrics
> Reporter: Michael Bieniosek
> Assigned To: David Bowen
> Priority: Minor
> Attachments: fix-tasks-running-metric.patch
>
>
> The maps_running and reduces_running metrics aren't getting into ganglia correctly - they always appear to be underestimated. A quick look at the TaskTracker code shows that these metrics are only updated when a task is finished. Of course, once a task is finished, the reporting will not note the completed task (since it's not running anymore).
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