Hi, I'm not sure if this is a know problem but when I use a
non-generic UDAF (either the examples under contrib or my own) within
a simple query they work fine but if I use them over a column from a
subquery, execution fails with the exceptions below.
Working query: select myavg(players) from test;
Failing query: select myavg(players) from (select players from test
order by day) tmp;
java.lang.RuntimeException: Error in configuring object
at
org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:93)
at
org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:64)
at
org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:117)
at
org.apache.hadoop.mapred.ReduceTask.runOldReducer(ReduceTask.java:426)
at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:411)
at org.apache.hadoop.mapred.Child.main(Child.java:170)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at
org.apache.hadoop.util.ReflectionUtils.setJobConf(ReflectionUtils.java:88)
... 5 more
Caused by: java.lang.RuntimeException: Reduce operator initialization failed
at
org.apache.hadoop.hive.ql.exec.ExecReducer.configure(ExecReducer.java:157)
... 10 more
Caused by: java.lang.RuntimeException: cannot find field value from [0:_col0]
at
org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorUtils.getStandardStructFieldRef(ObjectInspectorUtils.java:321)
at
org.apache.hadoop.hive.serde2.objectinspector.StandardStructObjectInspector.getStructFieldRef(StandardStructObjectInspector.java:119)
at
org.apache.hadoop.hive.ql.exec.ExprNodeColumnEvaluator.initialize(ExprNodeColumnEvaluator.java:82)
at
org.apache.hadoop.hive.ql.exec.GroupByOperator.initializeOp(GroupByOperator.java:252)
at org.apache.hadoop.hive.ql.exec.Operator.initialize(Operator.java:357)
at org.apache.hadoop.hive.ql.exec.Operator.initialize(Operator.java:433)
at
org.apache.hadoop.hive.ql.exec.Operator.initializeChildren(Operator.java:389)
at
org.apache.hadoop.hive.ql.exec.SelectOperator.initializeOp(SelectOperator.java:62)
at org.apache.hadoop.hive.ql.exec.Operator.initialize(Operator.java:357)
at org.apache.hadoop.hive.ql.exec.Operator.initialize(Operator.java:433)
at
org.apache.hadoop.hive.ql.exec.Operator.initializeChildren(Operator.java:389)
at
org.apache.hadoop.hive.ql.exec.SelectOperator.initializeOp(SelectOperator.java:62)
at org.apache.hadoop.hive.ql.exec.Operator.initialize(Operator.java:357)
at org.apache.hadoop.hive.ql.exec.Operator.initialize(Operator.java:433)
at
org.apache.hadoop.hive.ql.exec.Operator.initializeChildren(Operator.java:389)
at
org.apache.hadoop.hive.ql.exec.ExtractOperator.initializeOp(ExtractOperator.java:40)
at org.apache.hadoop.hive.ql.exec.Operator.initialize(Operator.java:357)
at
org.apache.hadoop.hive.ql.exec.ExecReducer.configure(ExecReducer.java:150)
... 10 more
Any help is appreciated!
