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https://issues.apache.org/jira/browse/SPARK-30158?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean R. Owen updated SPARK-30158:
---------------------------------
Description:
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 is a type def in 2.13, which makes it unusable in
Java. One set of tests needs to adapt.
was:
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.
> 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
> Priority: Minor
>
> 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 is a type def in 2.13, which makes it unusable
> in Java. One set of tests needs to adapt.
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