Sean R. Owen created SPARK-30158:
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Summary: Resolve Array + reference type compile problems in 2.13,
with sc.parallelize
Key: SPARK-30158
URL: https://issues.apache.org/jira/browse/SPARK-30158
Project: Spark
Issue Type: Sub-task
Components: Spark Core, SQL
Affects Versions: 3.0.0
Reporter: Sean R. Owen
Assignee: Sean R. Owen
Scala 2.13 has some different rules about resolving Arrays as Seqs when the
array is of a reference type. This primarily affects calls to
{{sc.parallelize(Array(...))}} where elements aren't primitive:
{code}
[ERROR] [Error]
/Users/seanowen/Documents/spark_2.13/mllib/src/main/scala/org/apache/spark/mllib/pmml/PMMLExportable.scala:61:
overloaded method value apply with alternatives:
(x: Unit,xs: Unit*)Array[Unit] <and>
(x: Double,xs: Double*)Array[Double] <and>
...
{code}
This is easy to resolve by using Seq instead.
Closely related: WrappedArray has gone away in 2.13, but the few usages of it
in Spark are pretty unnecessary.
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