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https://issues.apache.org/jira/browse/FLINK-23978?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17704148#comment-17704148
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Chesnay Schepler commented on FLINK-23978:
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Do you have flink-scala on the classpath? You shouldn't even get to the
FieldAccessorFactory part because the Scala type shouldn't be detected to be a
case class.
> FieldAccessor has direct scala dependency
> -----------------------------------------
>
> Key: FLINK-23978
> URL: https://issues.apache.org/jira/browse/FLINK-23978
> Project: Flink
> Issue Type: Sub-task
> Components: API / DataStream
> Reporter: Chesnay Schepler
> Assignee: Chesnay Schepler
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.15.0
>
>
> The FieldAccessor class in flink-streaming-java has a hard dependency on
> scala. It would be ideal if we could restrict this dependencies to
> flink-streaming-scala.
> We could move the SimpleProductFieldAccessor & RecursiveProductFieldAccessor
> to flink-streaming-scala, and load them in the FieldAccessorFactory via
> reflection.
> This is one of a few steps that would allow the Java Datastream API to be
> used without scala being on the classpath.
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