Zhenhao Li created FLINK-11274:
----------------------------------
Summary: 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
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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