srowen commented on a change in pull request #26862: [SPARK-30232] [SQL]fix the
ArthmeticException by zero when enable AQE
URL: https://github.com/apache/spark/pull/26862#discussion_r357146326
##########
File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/adaptive/OptimizeLocalShuffleReader.scala
##########
@@ -88,7 +88,7 @@ case class OptimizeLocalShuffleReader(conf: SQLConf) extends
Rule[SparkPlan] {
}
val numReducers = shuffleDep.partitioner.numPartitions
val expectedParallelism = advisoryParallelism.getOrElse(numReducers)
- val numMappers = shuffleDep.rdd.getNumPartitions
+ val numMappers = math.max(1, shuffleDep.rdd.getNumPartitions)
Review comment:
Hm, but if numMappers = 0, Array.fill never evaluates anything; you get an
empty array. Are you sure this is the cause?
----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
For queries about this service, please contact Infrastructure at:
[email protected]
With regards,
Apache Git Services
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
