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https://issues.apache.org/jira/browse/HADOOP-4350?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12637062#action_12637062
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Vinod K V commented on HADOOP-4350:
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HADOOP-3687 is a related issue.
> Ability to pause/resume jobs
> ----------------------------
>
> Key: HADOOP-4350
> URL: https://issues.apache.org/jira/browse/HADOOP-4350
> Project: Hadoop Core
> Issue Type: New Feature
> Components: mapred
> Reporter: Amar Kamat
>
> Consider a case where the user job depends on some external entity/service
> like a database or a web service. If the service needs restart or encounters
> a failure, the user should be able to pause the job and resume only when the
> service is up. This will be better than re-executing the whole job. Hence
> there should be some way to pause/resume jobs (from web-ui/command line) etc.
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