Hi Kryzsztof, it's true that we once added the Protobuf serializer automatically. However, due to versioning conflicts (see https://issues.apache.org/jira/browse/FLINK-1635), we removed it again. Now you have to register the ProtobufSerializer manually: https://ci.apache.org/projects/flink/flink-docs-master/apis/best_practices.html#register-a-custom-serializer-for-your-flink-program .
Cheers, Till On Mon, Nov 30, 2015 at 8:48 PM, Krzysztof Zarzycki <k.zarzy...@gmail.com> wrote: > Hi! > I'm trying to use generated Protobuf wrappers compiled with protoc and > pass them as objects between functions of Flink. I'm using Flink 0.10.0. > Unfortunately, I get an exception on runtime: > > [...] > Caused by: com.esotericsoftware.kryo.KryoException: > java.lang.UnsupportedOperationException > Serialization trace: > enrichments_ (com.company$MyObject) > at > com.esotericsoftware.kryo.serializers.ObjectField.read(ObjectField.java:125) > at > com.esotericsoftware.kryo.serializers.FieldSerializer.read(FieldSerializer.java:528) > at com.esotericsoftware.kryo.Kryo.readObject(Kryo.java:657) > at > org.apache.flink.api.java.typeutils.runtime.kryo.KryoSerializer.copy(KryoSerializer.java:162) > at > org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:313) > ... 11 more > Caused by: java.lang.UnsupportedOperationException > at java.util.Collections$UnmodifiableCollection.add(Collections.java:1055) > at > com.esotericsoftware.kryo.serializers.CollectionSerializer.read(CollectionSerializer.java:109) > at > com.esotericsoftware.kryo.serializers.CollectionSerializer.read(CollectionSerializer.java:22) > at com.esotericsoftware.kryo.Kryo.readObject(Kryo.java:679) > at > com.esotericsoftware.kryo.serializers.ObjectField.read(ObjectField.java:106) > ... 15 more > > > I believed that protobuf are now serializable on default Flink > configuration after fixing this issue in 0.9/0.8.1: > https://issues.apache.org/jira/browse/FLINK-1392 > > Maybe it really is, but Flink just requires some configuration? > I'll be grateful for your help with this issue. > Cheers, > Krzysztof > >
