[jira] [Commented] (SPARK-32051) Dataset.foreachPartition returns object

["Jungtaek Lim (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-32051?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17141980#comment-17141980 ] 

Jungtaek Lim commented on SPARK-32051:
--------------------------------------

Looks like existing two methods (Scala specific vs Java specific) conflict with Scala 2.12 whereas Scala 2.11 didn't.

You can explicitly mention the type in lambda like
{code:java}
.foreachPartition((part: Iterator[Row]) => {{code}
to workaround the issue temporarily, but I agree it still needs to be fixed.

> Dataset.foreachPartition returns object
> ---------------------------------------
>
>                 Key: SPARK-32051
>                 URL: https://issues.apache.org/jira/browse/SPARK-32051
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 3.0.0
>            Reporter: Frank Oosterhuis
>            Priority: Critical
>
> I'm trying to map values from the Dataset[Row], but since 3.0.0 this fails.
> In 3.0.0 I'm dealing with an error: "Error:(28, 38) value map is not a member of Object"
>  
> This is the simplest code that works in 2.4.x, but fails in 3.0.0:
> {code:scala}
> spark.range(100)
>   .repartition(10)
>   .foreachPartition(part => println(part.toList))
> {code}



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