[ https://issues.apache.org/jira/browse/MAPREDUCE-5381?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Vinod Kumar Vavilapalli resolved MAPREDUCE-5381. ------------------------------------------------ Resolution: Won't Fix Hardly any development is happening in 1.x now. I am closing this in favor of YARN's YARN-914. Please reopen if need be. > Support graceful decommission of tasktracker > -------------------------------------------- > > Key: MAPREDUCE-5381 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-5381 > Project: Hadoop Map/Reduce > Issue Type: Improvement > Components: mrv1 > Affects Versions: 1.2.0 > Reporter: Luke Lu > Assignee: Binglin Chang > Attachments: MAPREDUCE-5381-graceful-decomm.v1.patch > > > When TTs are decommissioned for non-fault reasons (capacity change etc.), > it's desirable to minimize the impact to running jobs. > Currently if a TT is decommissioned, all running tasks on the TT need to be > rescheduled on other TTs. Further more, for finished map tasks, if their map > output are not fetched by the reducers of the job, these map tasks will need > to be rerun as well. > We propose to introduce a mechanism to optionally gracefully decommission a > tasktracker. -- This message was sent by Atlassian JIRA (v6.3.4#6332)