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https://issues.apache.org/jira/browse/FLINK-11274?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16744100#comment-16744100
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Aljoscha Krettek commented on FLINK-11274:
------------------------------------------
>From looking at the list of changed between 1.7.0 and 1.7.1, I don't think
>anything could have caused this:
>https://issues.apache.org/jira/browse/FLINK-10367?jql=project%20%3D%20FLINK%20and%20fixVersion%20%3D%201.7.1%20and%20resolution%20!%3D%20unresolved
Is the code that you use to test this exactly the same when you test with Flink
1.7.0 and Flink 1.7.1? I mean, can you simply change the version in your POM
back to 1.7.0 and the error goes away?
> Scala 2.12 Kryo serialization bug
> ---------------------------------
>
> Key: FLINK-11274
> URL: https://issues.apache.org/jira/browse/FLINK-11274
> Project: Flink
> Issue Type: Bug
> Affects Versions: 1.7.1
> Environment: Flink 1.7.1
> Scala 2.12.8
> Reporter: Zhenhao Li
> Priority: Major
>
> The following code works well for serializing Scala classes, e.g.,
> SortedSet[T], without problem in 1.7.0.
> ```
> env.getConfig.registerTypeWithKryoSerializer(
> classOf[ClosureSerializer.Closure],
> classOf[ClosureSerializer]
> )
> ```
> However, in 1.7.1 the following error occurs when checkpointing.
> ```
> Serialization trace:
> cmp$2 (scala.math.Ordering$$anon$6)
> at
> com.esotericsoftware.kryo.util.DefaultClassResolver.readName(DefaultClassResolver.java:138)
> at
> com.esotericsoftware.kryo.util.DefaultClassResolver.readClass(DefaultClassResolver.java:115)
> at com.esotericsoftware.kryo.Kryo.readClass(Kryo.java:641)
> at
> com.esotericsoftware.kryo.serializers.ObjectField.read(ObjectField.java:99)
> at
> com.esotericsoftware.kryo.serializers.FieldSerializer.read(FieldSerializer.java:528)
> at com.esotericsoftware.kryo.Kryo.readClassAndObject(Kryo.java:761)
> at
> com.twitter.chill.SortedSetSerializer.read(SortedSetSerializer.scala:38)
> at
> com.twitter.chill.SortedSetSerializer.read(SortedSetSerializer.scala:21)
> at com.esotericsoftware.kryo.Kryo.readObject(Kryo.java:657)
> at
> org.apache.flink.api.java.typeutils.runtime.kryo.KryoSerializer.copy(KryoSerializer.java:231)
> at
> org.apache.flink.api.scala.typeutils.CaseClassSerializer.copy(CaseClassSerializer.scala:101)
> at
> org.apache.flink.api.scala.typeutils.CaseClassSerializer.copy(CaseClassSerializer.scala:32)
> at
> org.apache.flink.runtime.state.heap.CopyOnWriteStateTable.get(CopyOnWriteStateTable.java:287)
> at
> org.apache.flink.runtime.state.heap.CopyOnWriteStateTable.get(CopyOnWriteStateTable.java:311)
> at
> org.apache.flink.runtime.state.heap.HeapValueState.value(HeapValueState.java:73)
> at
> org.apache.flink.streaming.api.scala.function.StatefulFunction.applyWithState(StatefulFunction.scala:41)
> at
> org.apache.flink.streaming.api.scala.function.StatefulFunction.applyWithState$(StatefulFunction.scala:40)
> at
> org.apache.flink.streaming.api.scala.KeyedStream$$anon$3.applyWithState(KeyedStream.scala:591)
> at
> org.apache.flink.streaming.api.scala.KeyedStream$$anon$3.flatMap(KeyedStream.scala:596)
> at
> org.apache.flink.streaming.api.operators.StreamFlatMap.processElement(StreamFlatMap.java:50)
> at
> org.apache.flink.streaming.runtime.io.StreamInputProcessor.processInput(StreamInputProcessor.java:202)
> at
> org.apache.flink.streaming.runtime.tasks.OneInputStreamTask.run(OneInputStreamTask.java:105)
> at
> org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:300)
> at org.apache.flink.runtime.taskmanager.Task.run(Task.java:704)
> at java.lang.Thread.run(Thread.java:748)
> Caused by: java.lang.ClassNotFoundException:
> io.connecterra.stateful.AggregationSlidingWindowStateUpdater$$$Lambda$506/497325684
> at java.lang.Class.forName0(Native Method)
> at java.lang.Class.forName(Class.java:348)
> at
> com.esotericsoftware.kryo.util.DefaultClassResolver.readName(DefaultClassResolver.java:136)
> ... 24 common frames omitted
> ```
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