As per my understanding RabbitMQ server by default creates exchange of type Direct i.e If I create exchange without providing any type it will create exchange of type Direct.
Is there any way by which I can change default behavior i.e default exchange type as fanout instead of Direct i.e if exchange type is missing then exchange should be of type Fanout notDirect
No, this isn't configurable, but there is a default fanout exchange that is also created.