[HIVE-1291] Fix UDAFPercentile ndexOutOfBoundsException

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.6.0
• Fix Version/s: 0.6.0
• Hadoop Flags: Reviewed
• Assignee: Zheng Shao
• Reporter: Zheng Shao
• Created: 05/Apr/10 20:49
• Updated: 17/Dec/11 00:03
• Resolved: 06/Apr/10 06:11

Description

The counts array can be empty. We should directly return null in that case.

org.apache.hadoop.hive.ql.metadata.HiveException: Unable to execute method public org.apache.hadoop.hive.serde2.io.DoubleWritable org.apache.hadoop.hive.ql.udf.UDAFPercentile$PercentileLongEvaluator.terminate()  on object org.apache.hadoop.hive.ql.udf.UDAFPercentile$PercentileLongEvaluator@530d0eae of class org.apache.hadoop.hive.ql.udf.UDAFPercentile$PercentileLongEvaluator with arguments {} of size 0
	at org.apache.hadoop.hive.ql.exec.FunctionRegistry.invoke(FunctionRegistry.java:725)
	at org.apache.hadoop.hive.ql.udf.generic.GenericUDAFBridge$GenericUDAFBridgeEvaluator.terminate(GenericUDAFBridge.java:181)
	at org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator.evaluate(GenericUDAFEvaluator.java:157)
	at org.apache.hadoop.hive.ql.exec.GroupByOperator.forward(GroupByOperator.java:838)
	at org.apache.hadoop.hive.ql.exec.GroupByOperator.closeOp(GroupByOperator.java:885)
	at org.apache.hadoop.hive.ql.exec.Operator.close(Operator.java:539)
	at org.apache.hadoop.hive.ql.exec.ExecReducer.close(ExecReducer.java:300)
	at org.apache.hadoop.mapred.ReduceTask.runOldReducer(ReduceTask.java:474)
	at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:412)
	at org.apache.hadoop.mapred.Child.main(Child.java:159)
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.hive.ql.exec.FunctionRegistry.invoke(FunctionRegistry.java:701)
	... 9 more
Caused by: java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
	at java.util.ArrayList.RangeCheck(ArrayList.java:547)
	at java.util.ArrayList.get(ArrayList.java:322)
	at org.apache.hadoop.hive.ql.udf.UDAFPercentile.getPercentile(UDAFPercentile.java:97)
	at org.apache.hadoop.hive.ql.udf.UDAFPercentile.access$300(UDAFPercentile.java:44)
	at org.apache.hadoop.hive.ql.udf.UDAFPercentile$PercentileLongEvaluator.terminate(UDAFPercentile.java:196)
	... 14 more