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https://issues.apache.org/jira/browse/HADOOP-3245?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12624909#action_12624909
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dhruba borthakur commented on HADOOP-3245:
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I like Amar's proposal. It helps administration as well. Many-a-times when we
restart the jobtracker, we would like all task-trackers to check in before the
job-tracker starts running jobs. HDFS has something called "safe-mode" that is
automatically triggered when the namenode restarts. A similar thing wold be
very helpful for the JobTracker. IT allows an administrator to restart a
cluster, and then restart other pieces of software (e.g. etl pipelines) before
opening the cluster to run jobs. I would like to open a seperate JIRA for doing
this one.
> Provide ability to persist running jobs (extend HADOOP-1876)
> ------------------------------------------------------------
>
> Key: HADOOP-3245
> URL: https://issues.apache.org/jira/browse/HADOOP-3245
> Project: Hadoop Core
> Issue Type: New Feature
> Components: mapred
> Reporter: Devaraj Das
> Assignee: Amar Kamat
> Attachments: HADOOP-3245-v2.5.patch, HADOOP-3245-v2.6.5.patch,
> HADOOP-3245-v2.6.9.patch, HADOOP-3245-v4.1.patch, HADOOP-3245-v5.13.patch,
> HADOOP-3245-v5.14.patch, HADOOP-3245-v5.26.patch
>
>
> This could probably extend the work done in HADOOP-1876. This feature can be
> applied for things like jobs being able to survive jobtracker restarts.
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