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https://issues.apache.org/jira/browse/SPARK-27907?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Apache Spark reassigned SPARK-27907:
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Assignee: (was: Apache Spark)
> HiveUDAF with 0 rows throw NPE when try to serialize
> ----------------------------------------------------
>
> Key: SPARK-27907
> URL: https://issues.apache.org/jira/browse/SPARK-27907
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.3.3, 3.0.0, 2.4.3, 3.1.0
> Reporter: Ajith S
> Priority: Major
>
> When query returns zero rows, the HiveUDAFFunction.seralize throws NPE
> create table abc(a int)
> insert into abc values (1)
> insert into abc values (2)
> 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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