I'm using Artemis ActiveMQ v2.11.0 currently - have been using it since 1.x days. I have three environments: Integration, QA, and Production. In integration, I've got a standalone broker instance. In QA I'm running a two-node symmetric cluster using UDP discovery. I followed the docs and that worked fine. In Production I'm trying to set up a four-node symmetric cluster.
When I set up my first production cluster node, I started it up and it immediately joined my QA cluster. This was expected since the config still was using 231.7.7.7:9876 as the discovery address/port. (My Int/Qa/Prod VMs are in the same datacenter/VLAN so UDP traffic routes across them) I then reconfigured the settings using another UDP address - Only to find the other nodes configured using the new multicast/UDP address:port never connect or discover each other. I've double-and-triple-checked my configs and even tried using the examples and updating my working QA cluster to use another multicast addr (like 231.7.7.8 for instance). Any other address causes the cluster to lose sight of all other nodes. It really seems like you can't create a symmetric artemis cluster that works except by using the 231.7.7.7:9876 config. Has anyone else encountered this issue or ever tried to set up a simple two-node test cluster using another discovery address/port besides 231.7.7.7 and gotten it to work? Appreciate any suggestions anyone can offer. Thanks, -a
