Turn off the fairscheduler multiple task assign setting. I just had the same problem with my cluster.
On Tue, Jan 10, 2012 at 11:34 AM, Marek Miglinski <mmiglin...@seven.com>wrote: > Hello guys, > > 1. I have concern with my 3 node cluster, I run capacity scheduler with 4 > queues and one has 30% of cluster resources, the problem is that when I > schedule a job, all tasks are assigned to one single node which takes all > of it's mappers and works quite slow. Are there any settings for > mapred/capacity scheduler to assign mappers on all nodes by even number of > tasks? > > 2. I've set my capacity-scheduler.xml settings > "mapred.capacity-scheduler.queue.job1.capacity" for all queues as wanted > but jobtracker doesn't reallocate resources from free queues if only one is > working, why? > > > Thanks, > Marek M. >
