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!
