Stavros Kontopoulos created SPARK-27598:
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Summary: 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: 2.4.2, 2.4.1, 2.4.0, 3.0.0
Reporter: Stavros Kontopoulos
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
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
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