Hello, I am stuck at it. Please help
Regards Vaibhav Negi On Wed, Sep 29, 2010 at 5:30 PM, vaibhav negi <sssssssena...@gmail.com>wrote: > Hi, > > I am using hadoop version 0.20.2 > > While running query "select count(*) from table;" on Hive,i am getting this > error > > FAILED: Execution Error, return code 2 from org.apache.hadoop.hive.ql. > exec.MapRedTask > > Error in task tracker logs says :- > > Error: java.lang.NullPointerException > at java.util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:768) > at > org.apache.hadoop.mapred.ReduceTask$ReduceCopier$GetMapEventsThread.getMapCompletionEvents(ReduceTask.java:2683) > at > org.apache.hadoop.mapred.ReduceTask$ReduceCopier$GetMapEventsThread.run(ReduceTask.java:2605) > > > How to debug and correct it?? > > > Vaibhav Negi >
