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https://issues.apache.org/jira/browse/SPARK-27487?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16821911#comment-16821911
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Vadym Holubnychyi commented on SPARK-27487:
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It's said that 2.12.8 is compatible with all 2.12 minor versions.
https://github.com/scala/scala/releases/tag/v2.12.8
> Spark - Scala 2.12 compatibility
> --------------------------------
>
> Key: SPARK-27487
> URL: https://issues.apache.org/jira/browse/SPARK-27487
> Project: Spark
> Issue Type: Bug
> Components: Build, Deploy
> Affects Versions: 2.4.1
> Environment: Scala 2.12.7, Hadoop 2.7.7, Spark 2.4.1.
> Reporter: Vadym Holubnychyi
> Priority: Major
>
> Hi, I've faced one interesting problem during the development. It's written
> that Spark 2.4.1 is compatible with Scala 2.12 (a minor version is not
> specified!). So I tried to deploy an application that was written on Scala
> 2.12.7 and I got a lot of serialization errors. Later I checked that Spark
> had been built on Scala 2.12.8 and I switched on it, and everything works
> well now. Isn't it an error that Spark 2.4.1 doesn't support other minor
> versions?
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