[SPARK-10504] aggregate where NULL is defined as the value expression aborts when SUM used

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.3.1, 1.4.1
• Fix Version/s: 1.5.0
• Component/s: SQL
• Assignee: Yin Huai
• Reporter: N Campbell
• Created: 09/Sep/15 02:55
• Updated: 13/Oct/15 16:19
• Resolved: 16/Sep/15 18:29

Description

In ISO-SQL the context would determine an implicit type for NULL or one might find that a vendor requires an explicit type via CAST ( NULL as INTEGER). It appears that SPARK presumes a long type i.e. select min(NULL), max(NULL) but a query such the following aborts.

select sum ( null ) from tversion

Operation: execute
Errors:
org.apache.spark.SparkException: Job aborted due to stage failure: Task 0 in stage 5232.0 failed 4 times, most recent failure: Lost task 0.3 in stage 5232.0 (TID 18531, sandbox.hortonworks.com): scala.MatchError: NullType (of class org.apache.spark.sql.types.NullType$)
	at org.apache.spark.sql.catalyst.expressions.Cast.org$apache$spark$sql$catalyst$expressions$Cast$$cast(Cast.scala:403)
	at org.apache.spark.sql.catalyst.expressions.Cast.cast$lzycompute(Cast.scala:422)
	at org.apache.spark.sql.catalyst.expressions.Cast.cast(Cast.scala:422)
	at org.apache.spark.sql.catalyst.expressions.Cast.eval(Cast.scala:426)
	at org.apache.spark.sql.catalyst.expressions.Coalesce.eval(nullFunctions.scala:51)
	at org.apache.spark.sql.catalyst.expressions.Add.eval(arithmetic.scala:119)
	at org.apache.spark.sql.catalyst.expressions.Coalesce.eval(nullFunctions.scala:51)
	at org.apache.spark.sql.catalyst.expressions.MutableLiteral.update(literals.scala:82)
	at org.apache.spark.sql.catalyst.expressions.SumFunction.update(aggregates.scala:581)
	at org.apache.spark.sql.execution.Aggregate$$anonfun$execute$1$$anonfun$6.apply(Aggregate.scala:133)
	at org.apache.spark.sql.execution.Aggregate$$anonfun$execute$1$$anonfun$6.apply(Aggregate.scala:126)
	at org.apache.spark.rdd.RDD$$anonfun$14.apply(RDD.scala:634)
	at org.apache.spark.rdd.RDD$$anonfun$14.apply(RDD.scala:634)
	at org.apache.spark.rdd.MapPartitionsRDD.compute(MapPartitionsRDD.scala:35)
	at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:277)
	at org.apache.spark.rdd.RDD.iterator(RDD.scala:244)
	at org.apache.spark.rdd.MapPartitionsRDD.compute(MapPartitionsRDD.scala:35)
	at org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:277)
	at org.apache.spark.rdd.RDD.iterator(RDD.scala:244)
	at org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:68)
	at org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:41)
	at org.apache.spark.scheduler.Task.run(Task.scala:64)
	at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:203)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:745)