Re: Shuffle tasks getting killed

2010-09-24 Thread cliff palmer
I'm glad it helped Aniket. I would recommend that you start working on performance improvement with your network infrastructure and the balance of data across your logical racks.Cliff On Fri, Sep 24, 2010 at 12:12 AM, aniket ray wrote: > Hi Cliff, > > Thanks it did turn out to be speculative ex

Re: Shuffle tasks getting killed

2010-09-23 Thread aniket ray
Hi Cliff, Thanks it did turn out to be speculative execution. When I turned it off, no more tasks were killed and the performance degraded. So my initial assumptions were incorrect after all. I guess I'll have to look at other ways to improve performance. Thanks for the help. -aniket On Thu, Se

Re: Shuffle tasks getting killed

2010-09-23 Thread cliff palmer
Aniket, I wonder if these tasks were run as Speculative Execution. Have you been able to determine whether the job runs successfully? HTH Cliff On Thu, Sep 23, 2010 at 12:52 AM, aniket ray wrote: > Hi, > > I continuously run a series of batch job using Hadoop Map Reduce. I also > have a managin

Shuffle tasks getting killed

2010-09-22 Thread aniket ray
Hi, I continuously run a series of batch job using Hadoop Map Reduce. I also have a managing daemon that moves data around on the hdfs making way for more jobs to be run. I use capacity scheduler to schedule many jobs in parallel. I see an issue on the Hadoop web monitoring UI at port 50030 which