When you set the stream receiver, an instance of its class is created and serialized, which will also include any class it is nested in. On each Data Streamer buffer, the serialized form of that class is sent. If the class containing the stream receiver has a pointer that is not Externalizable, then you will serialize that object graph also.
Ensure that your stream receiver is in its own class, and that you are very careful about the members of that class. -- Sent from: http://apache-ignite-users.70518.x6.nabble.com/
