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https://issues.apache.org/jira/browse/HADOOP-6082?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12721672#action_12721672
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dhruba borthakur commented on HADOOP-6082:
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Also, we might not need any changes to the decommissioning feature because when
a node is decommissioned, currently running tasks are "killed" and not
"failed", so they do increase the probability of a job failure.
> Elegant decommission of lighty loaded tasktrackers from a map-reduce cluster
> ----------------------------------------------------------------------------
>
> Key: HADOOP-6082
> URL: https://issues.apache.org/jira/browse/HADOOP-6082
> Project: Hadoop Core
> Issue Type: New Feature
> Components: mapred
> Reporter: dhruba borthakur
> Assignee: Namit Jain
>
> There is a need to elegantly move some machines from one map-reduce cluster
> to another. This JIRA is to discuss how to find lightly loaded tasktrackers
> that are candidates for decommissioning and then to elegantly decommission
> them by waiting for existing tasks to finish.
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