So, I've been able to implement a "fix". What I did was deploy my
backend (War-file) on a Tomcat server (v5.5) and added RTMP to my
configuration: Channel configuration:
20
When I update data, another client
receives the updated data immediately. I don't know yet why it works,
but I'll figure that out :-). However, when I try the same on a Tomcat
v7 server, I don't receive the updates. I'll get into that, when I find
a solution I'll post it here.