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Arun C Murthy commented on MAPREDUCE-4366: ------------------------------------------ {quote} No, speculativeMaps == 1, by which we get pendingMaps as 1 since initialMaps=2 + speculativeMaps=1 - runningMaps=1 - finishedMaps=1 - failedMaps=0. Correct? {quote} To be clear - the reason is that the case you outlined speculativeMaps and runningMaps should track each other correctly. I believe that is the case... I hate myself for remembering this code! *smile* > mapred metrics shows negative count of waiting maps and reduces > --------------------------------------------------------------- > > Key: MAPREDUCE-4366 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-4366 > Project: Hadoop Map/Reduce > Issue Type: Bug > Components: jobtracker > Affects Versions: 1.0.2 > Reporter: Thomas Graves > Assignee: Sandy Ryza > Attachments: MAPREDUCE-4366-branch-1-1.patch, > MAPREDUCE-4366-branch-1.patch > > > Negative waiting_maps and waiting_reduces count is observed in the mapred > metrics. MAPREDUCE-1238 partially fixed this but it appears there is still > issues as we are seeing it, but not as bad. -- 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