Hi All, It turned out to be a DNS issue as Loren pointed out. It's working fine now.
Not going for CDH3 right now as this was only a hardware move. Thanks for your help! On Thu, Aug 11, 2011 at 10:18 PM, Loren Siebert <lo...@siebert.org> wrote: > Can you run normal MR jobs, like the example Pi calculation? Sometimes a > no-reducer problem stems from DNS issues— reducers use node names, not IP > addresses, so you need to have each machine knows how to resolve the names > of all the other machines in the cluster. > > If it's a new cluster, you may want to look at CDH3, as it is a pretty big > leap forward. > > On Aug 11, 2011, at 9:35 AM, Travis Powell wrote: > > Have you checked your logs? These are often the best places to start.**** > Look at the running job and click on the running count, the current task, > then the task logs.**** > ** ** > Sometimes they’re helpful, sometimes they’re not.**** > ** ** > http://hadoop-master:50030/jobtracker.jsp**** > ** ** > Travis Powell / tpow...@tealeaf.com**** > ** ** > *From:* hadoop n00b [mailto:new2h...@gmail.com] > *Sent:* Thursday, August 11, 2011 9:32 AM > *To:* user@hive.apache.org > *Subject:* Reducer Issue in New Setup**** > ** ** > Hello,**** > **** > We have just setup Hive on a new Hadoop cluster.**** > **** > When I run a select * on a table, it works fine but when I run any query > which needs a reducer, like count(1) or a where condition, the query just > sits there doing nothing (map 0%). I see some message like no reducers to > run. How do I fix this? The configuration et al is exactly like another > environment that is working fine.**** > **** > We are running CDH2 with Hadoop 0.20.1 and Hive 0.4.1**** > **** > Cheers!**** > > >
