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https://issues.apache.org/jira/browse/SPARK-27598?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16830738#comment-16830738
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Dongjoon Hyun commented on SPARK-27598:
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Thank you for reporting, [~skonto].
BTW, do you mean Spark 2.3/2.4 with Scala 2.11 work?
> DStreams checkpointing does not work with Scala 2.12
> ----------------------------------------------------
>
> Key: SPARK-27598
> URL: https://issues.apache.org/jira/browse/SPARK-27598
> Project: Spark
> Issue Type: Bug
> Components: DStreams
> Affects Versions: 2.4.0, 2.4.1, 2.4.2, 3.0.0
> Reporter: Stavros Kontopoulos
> Priority: Major
>
> When I restarted a stream with checkpointing enabled I got this:
> {quote}19/04/29 22:45:06 WARN CheckpointReader: Error reading checkpoint from
> file
> [file:/tmp/checkpoint/checkpoint-1556566950000.bk|file:///tmp/checkpoint/checkpoint-1556566950000.bk]
> java.io.IOException: java.lang.ClassCastException: cannot assign instance of
> java.lang.invoke.SerializedLambda to field
> org.apache.spark.streaming.dstream.FileInputDStream.filter of type
> scala.Function1 in instance of
> org.apache.spark.streaming.dstream.FileInputDStream
> at org.apache.spark.util.Utils$.tryOrIOException(Utils.scala:1322)
> at
> org.apache.spark.streaming.dstream.FileInputDStream.readObject(FileInputDStream.scala:314)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> {quote}
> It seems that the closure is stored in the Serialized format and cannot be
> assigned back to a scala function1
> Details of how to reproduce it here:
> [https://gist.github.com/skonto/87d5b2368b0bf7786d9dd992a710e4e6]
> Maybe this is spark-shell specific and is not expected to work anyway, as I
> dont see this to be an issues with a normal jar.
> Note that with Spark 2.3.3 the error is different and this still does not
> work but with a different error.
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