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https://issues.apache.org/jira/browse/FLINK-20082?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17230813#comment-17230813
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Yun Gao commented on FLINK-20082:
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Hi [~czchen] Sorry I tried but I still not yet be able to reproduce the
original exception, but I have some found that:
# For ValueStateDescriptor, it has re-implement the writeObject method, if is
created with _{{new ValueStateDescriptor[Long]("last_event_time",
classOf[Long], 0L)}}_, it would throws NullPointerException since it tries to
serialize the default value due to the serializer is not set. However, if it is
created with _{{new ValueStateDescriptor[Long]("last_event_time",
LongSerializer.INSTANCE, 0L)}}_ or _{{new
ValueStateDescriptor[Long]("last_event_time", LongSerializer.INSTANCE)}}_,
either the serializer is set or the default value is null, it would be right.
This might be a problem here. Another solution would be to create
`ValueStateDescriptor` inside the open function.
For the original issue, I'm not sure if it is related to the above issue, could
you also provide a small example to reproduce the exceptions ? Very thanks!
> Cannot start Flink application due to "cannot assign instance of
> java.lang.invoke.SerializedLambda to type scala.Function1
> --------------------------------------------------------------------------------------------------------------------------
>
> Key: FLINK-20082
> URL: https://issues.apache.org/jira/browse/FLINK-20082
> Project: Flink
> Issue Type: Bug
> Components: API / DataStream, API / Scala
> Affects Versions: 1.11.2
> Environment: * Flink 1.11.2
> * Java 11
> * Scala 2.12.11
> Reporter: ChangZhuo Chen (陳昌倬)
> Priority: Major
> Attachments: Flink-1.11.2_Scala-2.11.log,
> Flink-1.11.2_Scala-2.12.log, image-20201110-060934.png
>
>
> Hi,
> * Our Flink application (Java 11 + Scala 2.12) has the following problem
> when executing it. It cannot be run in Flink cluster.
> * The problem is similar to
> https://issues.apache.org/jira/browse/SPARK-25047, so maybe the same fix
> shall be implemented in Flink?
> !image-20201110-060934.png!
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