Xiangrui Meng created SPARK-17641:
-------------------------------------
Summary: collect_set should ignore null values
Key: SPARK-17641
URL: https://issues.apache.org/jira/browse/SPARK-17641
Project: Spark
Issue Type: Bug
Components: SQL
Affects Versions: 2.0.0
Reporter: Xiangrui Meng
`collect_set` throws the following exception when there are null values. It
should ignore null values to be consistent with other aggregation methods.
{code}
java.lang.IllegalArgumentException: Flat hash tables cannot contain null
elements.
at
scala.collection.mutable.FlatHashTable$HashUtils$class.elemHashCode(FlatHashTable.scala:390)
at scala.collection.mutable.HashSet.elemHashCode(HashSet.scala:41)
at
scala.collection.mutable.FlatHashTable$class.addEntry(FlatHashTable.scala:136)
at scala.collection.mutable.HashSet.addEntry(HashSet.scala:41)
at scala.collection.mutable.HashSet.$plus$eq(HashSet.scala:60)
at scala.collection.mutable.HashSet.$plus$eq(HashSet.scala:41)
at
org.apache.spark.sql.catalyst.expressions.aggregate.Collect.update(collect.scala:64)
at
org.apache.spark.sql.execution.aggregate.AggregationIterator$$anonfun$1$$anonfun$applyOrElse$1.apply(AggregationIterator.scala:170)
at
org.apache.spark.sql.execution.aggregate.AggregationIterator$$anonfun$1$$anonfun$applyOrElse$1.apply(AggregationIterator.scala:170)
at
org.apache.spark.sql.execution.aggregate.AggregationIterator$$anonfun$generateProcessRow$1.apply(AggregationIterator.scala:186)
at
org.apache.spark.sql.execution.aggregate.AggregationIterator$$anonfun$generateProcessRow$1.apply(AggregationIterator.scala:180)
at
org.apache.spark.sql.execution.aggregate.SortBasedAggregationIterator.processCurrentSortedGroup(SortBasedAggregationIterator.scala:115)
at
org.apache.spark.sql.execution.aggregate.SortBasedAggregationIterator.next(SortBasedAggregationIterator.scala:150)
at
org.apache.spark.sql.execution.aggregate.SortBasedAggregationIterator.next(SortBasedAggregationIterator.scala:29)
at
org.apache.spark.sql.execution.SparkPlan$$anonfun$3.apply(SparkPlan.scala:232)
at
org.apache.spark.sql.execution.SparkPlan$$anonfun$3.apply(SparkPlan.scala:225)
{code}
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org
For additional commands, e-mail: issues-h...@spark.apache.org
