This is not expected. Can you send the query and the explain plan for the query.
Ashish ________________________________ From: Ryan LeCompte [mailto:[email protected]] Sent: Sunday, October 11, 2009 4:02 PM To: [email protected] Subject: Failures during map/reduce when running a hive query Hello all, My hive queries are returning back successfully, however if I did in the map/reduce job that's running as a result of running the query, I see the following errors in a lot of map tasks that get killed: java.lang.RuntimeException: Map operator initialization failed at org.apache.hadoop.hive.ql.exec.ExecMapper.configure(ExecMapper.java:110) at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:58) at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:83) at org.apache.hadoop.mapred.MapRunner.configure(MapRunner.java:34) at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:58) at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:83) at org.apache.hadoop.mapred.MapTask.run(MapTask.java:328) at org.apache.hadoop.mapred.Child.main(Child.java:155) Caused by: java.lang.NullPointerException at org.apache.hadoop.hive.ql.exec.GroupByOperator.initializeOp(GroupByOperator.java:207) at org.apache.hadoop.hive.ql.exec.Operator.initialize(Operator.java:316) at org.apache.hadoop.hive.ql.exec.Operator.initialize(Operator.java:353) at org.apache.hadoop.hive.ql.exec.Operator.initializeChildren(Operator.java:338) at org.apache.hadoop.hive.ql.exec.SelectOperator.initializeOp(SelectOperator.java:59) at org.apache.hadoop.hive.ql.exec.Operator.initialize(Operator.java:316) at org.apache.hadoop.hive.ql.exec.Operator.initialize(Operator.java:353) at org.apache.hadoop.hive.ql.exec.Operator.initializeChildren(Operator.java:338) at org.apache.hadoop.hive.ql.exec.Operator.initializeOp(Operator.java:324) at org.apache.hadoop.hive.ql.exec.Operator.initialize(Operator.java:316) at org.apache.hadoop.hive.ql.exec.MapOperator.initializeOp(MapOperator.java:301) at org.apache.hadoop.hive.ql.exec.Operator.initialize(Operator.java:316) at org.apache.hadoop.hive.ql.exec.ExecMapper.configure(ExecMapper.java:82) ... 7 more The reducers also fail at times with similar exceptions/errors. Is this expected, or do I have something misconfigured? I don't have the hive distribution on all of my hadoop nodes, just the single node where I run the queries. I am using 0.4-rc2. Thanks, Ryan
