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https://issues.apache.org/jira/browse/MAPREDUCE-2648?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13722210#comment-13722210
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Tsuyoshi OZAWA commented on MAPREDUCE-2648:
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What's going on about this JIRA? We have clusters with Hadoop 0.20 or 1.0
series, so we need HA for JT. If no one is implementing this, I'd like to
tackle this ticket based on Devaraj's design note.
> High Availability for JobTracker
> --------------------------------
>
> Key: MAPREDUCE-2648
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-2648
> Project: Hadoop Map/Reduce
> Issue Type: New Feature
> Reporter: Devaraj K
> Attachments: High Availability for JobTracker.pdf
>
> Original Estimate: 336h
> Remaining Estimate: 336h
>
> In Hadoop cluster, JobTracker is responsible for managing the life cycle of
> MapReduce jobs. If JobTracker fails, then MapReduce service will not be
> available until JobTracker is restarted. We propose an automatic failover
> solution for JobTracker to address such single point of failure. It is based
> on Leader Election Framework suggested in ZOOKEEPER-1080
> Please refer to attached document.
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