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Vinod Kumar Vavilapalli commented on MAPREDUCE-4328: ---------------------------------------------------- Had a brief review of the patch. +1 for commit, but only with a minor fix: bq. + throw new AccessControlException(user + bq. + " is not authorized to refresh nodes."); Should be get/set safemode. > Add the option to quiesce the JobTracker > ---------------------------------------- > > Key: MAPREDUCE-4328 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-4328 > Project: Hadoop Map/Reduce > Issue Type: Improvement > Components: mrv1 > Affects Versions: 1.0.3 > Reporter: Arun C Murthy > Assignee: Arun C Murthy > Fix For: 1.2.0 > > Attachments: MAPREDUCE-4328.patch, MAPREDUCE-4328.patch, > TestJobTrackerQuiescence.java > > > In several failure scenarios it would be very handy to have an option to > quiesce the JobTracker. > Recently, we saw a case where the NameNode had to be rebooted at a customer > due to a random hardware failure - in such a case it would have been nice to > not lose jobs by quiescing the JobTracker. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira