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Date: Mon, 5 Apr 2010 20:50:27 +0000 (UTC)
From: "Zheng Shao (JIRA)" <jira@apache.org>
To: hive-dev@hadoop.apache.org
Subject: [jira] Created: (HIVE-1291) Fix UDAFPercentile
 ndexOutOfBoundsException
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Fix UDAFPercentile ndexOutOfBoundsException
-------------------------------------------

                 Key: HIVE-1291
                 URL: https://issues.apache.org/jira/browse/HIVE-1291
             Project: Hadoop Hive
          Issue Type: Bug
    Affects Versions: 0.6.0
            Reporter: Zheng Shao
            Assignee: Zheng Shao


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

{code}
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
{code}


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