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https://issues.apache.org/jira/browse/HADOOP-4559?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12650838#action_12650838
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Paco Nathan commented on HADOOP-4559:
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> Isn't most of this provided through job history?
No, not really. Not if a long-running workflow requires these measurements for
automated decisions.
While a human can *read* the job history data from JSP pages, there's no
current means for the app code which calls ToolRunner to obtain that data and
use it to alter the workflow.
> Rest API for retrieving job / task statistics
> ----------------------------------------------
>
> Key: HADOOP-4559
> URL: https://issues.apache.org/jira/browse/HADOOP-4559
> Project: Hadoop Core
> Issue Type: New Feature
> Reporter: Florian Leibert
> Priority: Trivial
> Fix For: 0.20.0
>
> Attachments: HADOOP-4559.patch
>
> Original Estimate: 2h
> Remaining Estimate: 2h
>
> a rest api that returns a simple JSON containing information about a given
> job such as: min/max/avg times per task, failed tasks, etc. This would be
> useful in order to allow external restart or modification of parameters of a
> run.
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