According to https://issues.jboss.org/browse/HORNETQ-716 if server A crashed in a cluster, core bridge of server B will continue sending message to it. After restart A, I can consumer these message from A.
What if A can not be restarted for some reason, but I can get the data directory of A, can I copy the data directory to another machine C and start a hornetq server on C and B will send those "lost" messages to C?
On that case, that machine Will become the old machine.
At the current version, you would need to have that box assuming the same IPs. That's something I'm changing for the next version though.