Migration Java to Jackson serialization

@junho wrote:

Hey.
My project is using java serializer. I am migrating to akka 2.6

My message classes is used as below with java serializer.
public class MyMessage implements Serializable
serializers {
** java = “akka.serialization.JavaSerializer”**
** jackson-json = “akka.serialization.jackson.JacksonJsonSerializer”**
** }**
** serialization-bindings {**
** “com.my.MyMessage” = java**
** }**

I modified as described.
(https://doc.akka.io/docs/akka/current/additional/rolling-updates.html#from-java-serialization-to-jackson)

public class MyMessage implements Serializable, MySerializable
serializers {
** java = “akka.serialization.JavaSerializer”**
** jackson-json = “akka.serialization.jackson.JacksonJsonSerializer”**
** }**
** serialization-bindings {**
** “com.my.MyMessage” = java**
** }**

but, It cannot work. I can’t understand this comment.
Change message classes by adding the marker interface and possibly needed annotations as described in Serialization with Jackson.

How can old cluster deserialize java/jackson in 2nd step? Please explain in detail.

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