Recovering SnapshotOffer cause System.FormatException

[Jeka-Vasiliev]

We saving snapshots this way

SaveSnapshot(GetDeliverySnapshot());

It serialized as:

{
    "_id" : "DeliverToDeviceActor_10",
    "PersistenceId" : "DeliverToDeviceActor",
    "SequenceNr" : NumberLong(10),
    "Timestamp" : NumberLong(636892944877948589),
    "Snapshot" : {
        "_t" : "Akka.Persistence.AtLeastOnceDeliverySnapshot, Akka.Persistence",
        "CurrentDeliveryId" : NumberLong(5),
        "UnconfirmedDeliveries" : [ 
            {
                "DeliveryId" : NumberLong(5),
                "Destination" : {
                    "_t" : "ChildActorPath"
                },
                "Message" : {
                    "_t" : "Dodo.LabelPrinter.Domain.Messages.ReliableDeliveryLabel, Dodo.LabelPrinter.Domain",
                    "DeliveryId" : NumberLong(5),
                    "Label" : {
                        "PizzeriaId" : "7085C24375A3B98911E9509E612E01E4",
                        "Label" : {
                            "_id" : LUUID("00009543-5d32-ff00-f16d-08d6b2c2462c"),
                            "Body" : {
                                "Number" : 0,
                                "BoxQuantity" : 0,
                                "ProductName" : "pepperoni"
                            }
                        }
                    }
                }
            }
        ]
    }
}

When recover occurs:

Persistence failure when replaying events for persistenceId [DeliverToDeviceActor]. Last known sequence number [0]
System.FormatException: An error occurred while deserializing the Snapshot property of class Akka.Persistence.MongoDb.Snapshot.SnapshotEntry: An error occurred while deserializing the UnconfirmedDeliveries property of class Akka.Persistence.AtLeastOnceDeliveryS
napshot: An error occurred while deserializing the Destination property of class Akka.Persistence.UnconfirmedDelivery: Cannot create an abstract class. ---> System.FormatException: An error occurred while deserializing the UnconfirmedDeliveries property of clas
s Akka.Persistence.AtLeastOnceDeliverySnapshot: An error occurred while deserializing the Destination property of class Akka.Persistence.UnconfirmedDelivery: Cannot create an abstract class. ---> System.FormatException: An error occurred while deserializing the
 Destination property of class Akka.Persistence.UnconfirmedDelivery: Cannot create an abstract class. ---> System.MemberAccessException: Cannot create an abstract class.
   at System.Runtime.Serialization.FormatterServices.nativeGetUninitializedObject(RuntimeType type)
   at System.Runtime.Serialization.FormatterServices.GetUninitializedObject(Type type)
   at lambda_method(Closure )
   at MongoDB.Bson.Serialization.BsonClassMap.CreateInstance()
   at MongoDB.Bson.Serialization.BsonClassMapSerializer`1.DeserializeClass(BsonDeserializationContext context)
   at MongoDB.Bson.Serialization.BsonClassMapSerializer`1.Deserialize(BsonDeserializationContext context, BsonDeserializationArgs args)
   at MongoDB.Bson.Serialization.Serializers.SerializerBase`1.MongoDB.Bson.Serialization.IBsonSerializer.Deserialize(BsonDeserializationContext context, BsonDeserializationArgs args)
   at MongoDB.Bson.Serialization.IBsonSerializerExtensions.Deserialize(IBsonSerializer serializer, BsonDeserializationContext context)
   at MongoDB.Bson.Serialization.BsonClassMapSerializer`1.DeserializeMemberValue(BsonDeserializationContext context, BsonMemberMap memberMap)
   --- End of inner exception stack trace ---
   at MongoDB.Bson.Serialization.BsonClassMapSerializer`1.DeserializeMemberValue(BsonDeserializationContext context, BsonMemberMap memberMap)
   at MongoDB.Bson.Serialization.BsonClassMapSerializer`1.DeserializeClass(BsonDeserializationContext context)
   at MongoDB.Bson.Serialization.BsonClassMapSerializer`1.Deserialize(BsonDeserializationContext context, BsonDeserializationArgs args)
   at MongoDB.Bson.Serialization.IBsonSerializerExtensions.Deserialize[TValue](IBsonSerializer`1 serializer, BsonDeserializationContext context)
   at MongoDB.Bson.Serialization.Serializers.EnumerableSerializerBase`2.Deserialize(BsonDeserializationContext context, BsonDeserializationArgs args)
   at MongoDB.Bson.Serialization.Serializers.SerializerBase`1.MongoDB.Bson.Serialization.IBsonSerializer.Deserialize(BsonDeserializationContext context, BsonDeserializationArgs args)
   at MongoDB.Bson.Serialization.IBsonSerializerExtensions.Deserialize(IBsonSerializer serializer, BsonDeserializationContext context)
   at MongoDB.Bson.Serialization.BsonClassMapSerializer`1.DeserializeMemberValue(BsonDeserializationContext context, BsonMemberMap memberMap)
   --- End of inner exception stack trace ---
   at MongoDB.Bson.Serialization.BsonClassMapSerializer`1.DeserializeMemberValue(BsonDeserializationContext context, BsonMemberMap memberMap)
   at MongoDB.Bson.Serialization.BsonClassMapSerializer`1.DeserializeClass(BsonDeserializationContext context)
   at MongoDB.Bson.Serialization.BsonClassMapSerializer`1.Deserialize(BsonDeserializationContext context, BsonDeserializationArgs args)
   at MongoDB.Bson.Serialization.Serializers.SerializerBase`1.MongoDB.Bson.Serialization.IBsonSerializer.Deserialize(BsonDeserializationContext context, BsonDeserializationArgs args)
   at MongoDB.Bson.Serialization.Serializers.ObjectSerializer.DeserializeDiscriminatedValue(BsonDeserializationContext context, BsonDeserializationArgs args)
   at MongoDB.Bson.Serialization.Serializers.ObjectSerializer.Deserialize(BsonDeserializationContext context, BsonDeserializationArgs args)
   at Akka.Persistence.MongoDb.FullTypeNameObjectSerializer.Deserialize(BsonDeserializationContext context, BsonDeserializationArgs args)
   at MongoDB.Bson.Serialization.Serializers.SerializerBase`1.MongoDB.Bson.Serialization.IBsonSerializer.Deserialize(BsonDeserializationContext context, BsonDeserializationArgs args)
   at MongoDB.Bson.Serialization.IBsonSerializerExtensions.Deserialize(IBsonSerializer serializer, BsonDeserializationContext context)
   at MongoDB.Bson.Serialization.BsonClassMapSerializer`1.DeserializeMemberValue(BsonDeserializationContext context, BsonMemberMap memberMap)
   --- End of inner exception stack trace ---
   at MongoDB.Bson.Serialization.BsonClassMapSerializer`1.DeserializeMemberValue(BsonDeserializationContext context, BsonMemberMap memberMap)
   at MongoDB.Bson.Serialization.BsonClassMapSerializer`1.DeserializeClass(BsonDeserializationContext context)
   at MongoDB.Bson.Serialization.BsonClassMapSerializer`1.Deserialize(BsonDeserializationContext context, BsonDeserializationArgs args)
   at MongoDB.Bson.Serialization.IBsonSerializerExtensions.Deserialize[TValue](IBsonSerializer`1 serializer, BsonDeserializationContext context)
   at MongoDB.Bson.Serialization.Serializers.ProjectingDeserializer`2.Deserialize(BsonDeserializationContext context, BsonDeserializationArgs args)
   at MongoDB.Bson.Serialization.IBsonSerializerExtensions.Deserialize[TValue](IBsonSerializer`1 serializer, BsonDeserializationContext context)
   at MongoDB.Driver.Core.Operations.CursorBatchDeserializationHelper.DeserializeBatch[TDocument](RawBsonArray batch, IBsonSerializer`1 documentSerializer, MessageEncoderSettings messageEncoderSettings)
   at MongoDB.Driver.Core.Operations.FindCommandOperation`1.CreateCursorBatch(BsonDocument commandResult)
   at MongoDB.Driver.Core.Operations.FindCommandOperation`1.CreateCursor(IChannelSourceHandle channelSource, BsonDocument commandResult, Boolean slaveOk)
   at MongoDB.Driver.Core.Operations.FindCommandOperation`1.ExecuteAsync(IReadBinding binding, CancellationToken cancellationToken)
   at MongoDB.Driver.Core.Operations.FindOperation`1.ExecuteAsync(IReadBinding binding, CancellationToken cancellationToken)
   at MongoDB.Driver.OperationExecutor.ExecuteReadOperationAsync[TResult](IReadBinding binding, IReadOperation`1 operation, CancellationToken cancellationToken)
   at MongoDB.Driver.MongoCollectionImpl`1.ExecuteReadOperationAsync[TResult](IClientSessionHandle session, IReadOperation`1 operation, ReadPreference readPreference, CancellationToken cancellationToken)
   at MongoDB.Driver.MongoCollectionImpl`1.UsingImplicitSessionAsync[TResult](Func`2 funcAsync, CancellationToken cancellationToken)
   at MongoDB.Driver.IAsyncCursorSourceExtensions.FirstOrDefaultAsync[TDocument](IAsyncCursorSource`1 source, CancellationToken cancellationToken)
   at Akka.Util.Internal.AtomicState.CallThrough[T](Func`1 task)
   at Akka.Util.Internal.AtomicState.CallThrough[T](Func`1 task)

[Aaronontheweb]

Related: #53

[Aaronontheweb]

Resolved via #71