Deserialization to StreamEventAppeared failed, no parameterless constructor defined

EventStoreDB
1

Hi,

I’m running eventstore/eventstore:release-4.1.0 with docker and connecting from a netcore v2 app. I have an NUnit test that sometimes fails. When it fails the stack trace below goes to stdout. Anyone recognize what this could be before I start digging?

The client is EventStore.ClientAPI.NetCore 4.1.0.23

[57,23:22:26.807,DEBUG] Deserialization to EventStore.ClientAPI.Messages.ClientMessage+StreamEventAppeared failed : System.MissingMethodException: No parameterless constructor defined for this object.

at System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean& canBeCached, RuntimeMethodHandleInternal& ctor)

at System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache, StackCrawlMark& stackMark)

at System.Activator.CreateInstance(Type type, Boolean nonPublic)

at System.Activator.CreateInstance(Type type)

at ProtoBuf.Serializers.TypeSerializer.CreateInstance(ProtoReader source, Boolean includeLocalCallback) in C:\code\protobuf-net\src\protobuf-net\Serializers\TypeSerializer.cs:line 314

at ProtoBuf.Serializers.TypeSerializer.Read(Object value, ProtoReader source) in C:\code\protobuf-net\src\protobuf-net\Serializers\TypeSerializer.cs:line 209

at ProtoBuf.ProtoReader.ReadTypedObject(Object value, Int32 key, ProtoReader reader, Type type) in C:\code\protobuf-net\src\protobuf-net\ProtoReader.cs:line 607

at proto_18(Object , ProtoReader )

at ProtoBuf.ProtoReader.ReadTypedObject(Object value, Int32 key, ProtoReader reader, Type type) in C:\code\protobuf-net\src\protobuf-net\ProtoReader.cs:line 607

at proto_16(Object , ProtoReader )

at ProtoBuf.Meta.TypeModel.DeserializeCore(ProtoReader reader, Type type, Object value, Boolean noAutoCreate) in C:\code\protobuf-net\src\protobuf-net\Meta\TypeModel.cs:line 748

at ProtoBuf.Meta.TypeModel.Deserialize(Stream source, Object value, Type type, SerializationContext context) in C:\code\protobuf-net\src\protobuf-net\Meta\TypeModel.cs:line 606

at ProtoBuf.Serializer.Deserialize[T](Stream source) in C:\code\protobuf-net\src\protobuf-net\Serializer.cs:line 84

at EventStore.ClientAPI.Transport.Tcp.ProtobufExtensions.Deserialize[T](ArraySegment`1 data)
2

Missing/broken binding redirects etc ? This is definitely not a normal exception one eperiences

3

I have same problems. Version 4.1.1 hotfix, with EventStore.ClientApi.NetCore 4.1.0.23.
I am running multiple Catch up subscriptions. Very hard to reproduce consistently.

Will try to dig in.

4

After updating to EventStore.ClientApi.NetCore 4.1.1.rc, issue has subsided.
Will monitor this a bit further.