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https://issues.apache.org/jira/browse/SPARK-27907?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Dongjoon Hyun updated SPARK-27907:
----------------------------------
    Labels: correctness  (was: )

> HiveUDAF should return NULL in case of 0 rows
> ---------------------------------------------
>
>                 Key: SPARK-27907
>                 URL: https://issues.apache.org/jira/browse/SPARK-27907
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 2.4.3
>            Reporter: Ajith S
>            Assignee: Ajith S
>            Priority: Blocker
>              Labels: correctness
>             Fix For: 2.3.4, 2.4.4, 3.0.0
>
>
> When query returns zero rows, the HiveUDAFFunction throws NPE
> CASE 1:
> create table abc(a int)
> select histogram_numeric(a,2) from abc // NPE
> Job aborted due to stage failure: Task 0 in stage 1.0 failed 1 times, most 
> recent failure: Lost task 0.0 in stage 1.0 (TID 0, localhost, executor 
> driver): java.lang.NullPointerException
>       at org.apache.spark.sql.hive.HiveUDAFFunction.eval(hiveUDFs.scala:471)
>       at org.apache.spark.sql.hive.HiveUDAFFunction.eval(hiveUDFs.scala:315)
>       at 
> org.apache.spark.sql.catalyst.expressions.aggregate.TypedImperativeAggregate.eval(interfaces.scala:543)
>       at 
> org.apache.spark.sql.execution.aggregate.AggregationIterator.$anonfun$generateResultProjection$5(AggregationIterator.scala:231)
>       at 
> org.apache.spark.sql.execution.aggregate.ObjectAggregationIterator.outputForEmptyGroupingKeyWithoutInput(ObjectAggregationIterator.scala:97)
>       at 
> org.apache.spark.sql.execution.aggregate.ObjectHashAggregateExec.$anonfun$doExecute$2(ObjectHashAggregateExec.scala:132)
>       at 
> org.apache.spark.sql.execution.aggregate.ObjectHashAggregateExec.$anonfun$doExecute$2$adapted(ObjectHashAggregateExec.scala:107)
>       at 
> org.apache.spark.rdd.RDD.$anonfun$mapPartitionsWithIndexInternal$2(RDD.scala:839)
>       at 
> org.apache.spark.rdd.RDD.$anonfun$mapPartitionsWithIndexInternal$2$adapted(RDD.scala:839)
>       at 
> org.apache.spark.rdd.MapPartitionsRDD.compute(MapPartitionsRDD.scala:52)
>       at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:327)
>       at org.apache.spark.rdd.RDD.iterator(RDD.scala:291)
>       at 
> org.apache.spark.rdd.MapPartitionsRDD.compute(MapPartitionsRDD.scala:52)
>       at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:327)
>       at org.apache.spark.rdd.RDD.iterator(RDD.scala:291)
>       at 
> org.apache.spark.rdd.MapPartitionsRDD.compute(MapPartitionsRDD.scala:52)
>       at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:327)
>       at org.apache.spark.rdd.RDD.iterator(RDD.scala:291)
>       at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:90)
>       at org.apache.spark.scheduler.Task.run(Task.scala:122)
>       at 
> org.apache.spark.executor.Executor$TaskRunner.$anonfun$run$3(Executor.scala:425)
>       at org.apache.spark.util.Utils$.tryWithSafeFinally(Utils.scala:1350)
>       at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:428)
>       at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
>       at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
>       at java.lang.Thread.run(Thread.java:745)
> CASE 2:
> create table abc(a int)
> insert into abc values (1)
> select histogram_numeric(a,2) from abc where a=3 //NPE
> Job aborted due to stage failure: Task 0 in stage 4.0 failed 1 times, most 
> recent failure: Lost task 0.0 in stage 4.0 (TID 5, localhost, executor 
> driver): java.lang.NullPointerException
>       at 
> org.apache.spark.sql.hive.HiveUDAFFunction.serialize(hiveUDFs.scala:477)
>       at 
> org.apache.spark.sql.hive.HiveUDAFFunction.serialize(hiveUDFs.scala:315)
>       at 
> org.apache.spark.sql.catalyst.expressions.aggregate.TypedImperativeAggregate.serializeAggregateBufferInPlace(interfaces.scala:570)
>       at 
> org.apache.spark.sql.execution.aggregate.AggregationIterator.$anonfun$generateResultProjection$6(AggregationIterator.scala:254)
>       at 
> org.apache.spark.sql.execution.aggregate.ObjectAggregationIterator.outputForEmptyGroupingKeyWithoutInput(ObjectAggregationIterator.scala:97)
>       at 
> org.apache.spark.sql.execution.aggregate.ObjectHashAggregateExec.$anonfun$doExecute$2(ObjectHashAggregateExec.scala:132)
>       at 
> org.apache.spark.sql.execution.aggregate.ObjectHashAggregateExec.$anonfun$doExecute$2$adapted(ObjectHashAggregateExec.scala:107)
>       at 
> org.apache.spark.rdd.RDD.$anonfun$mapPartitionsWithIndexInternal$2(RDD.scala:839)
>       at 
> org.apache.spark.rdd.RDD.$anonfun$mapPartitionsWithIndexInternal$2$adapted(RDD.scala:839)
>       at 
> org.apache.spark.rdd.MapPartitionsRDD.compute(MapPartitionsRDD.scala:52)
>       at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:327)
>       at org.apache.spark.rdd.RDD.iterator(RDD.scala:291)
>       at 
> org.apache.spark.rdd.MapPartitionsRDD.compute(MapPartitionsRDD.scala:52)
>       at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:327)
>       at org.apache.spark.rdd.RDD.iterator(RDD.scala:291)
>       at 
> org.apache.spark.shuffle.ShuffleWriteProcessor.write(ShuffleWriteProcessor.scala:59)
>       at 
> org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:94)
>       at 
> org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:52)
>       at org.apache.spark.scheduler.Task.run(Task.scala:122)
>       at 
> org.apache.spark.executor.Executor$TaskRunner.$anonfun$run$3(Executor.scala:425)
>       at org.apache.spark.util.Utils$.tryWithSafeFinally(Utils.scala:1350)
>       at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:428)
>       at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
>       at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
>       at java.lang.Thread.run(Thread.java:745)



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