Hi there, I have been using the ActiveMQ Artemis JMS interface without JNDI. We are not using server discovery, we use static connectors instead. In the connection factory configuration we supply a list of hosts, that are located on two different datacenters, acting as two different clusters. Using the RoundRobinConnectionLoadBalancingPolicy we expected to connect to every server on the list, but that was not what happened. Debugging the code we realized that, after connecting to the first (random) host on the list, the Server Locator do not use the initial connectors list anymore, it uses the received topology for the next connections. We understand this might be useful in simpler scenarios, but this is not working for us. On a sandbox environment we have even tried to remove the cluster connection configuration, for the servers to act on a stadalone manner, but even though the server locator acts the same way, receiving a "topology" of only one node and restrict the next connections this one host.
There is a number of problems and inneficiencies we see on this approach. If we have a cluster with 3 hosts for example, and we declare those on the host list and get 3 connections using the round robin policy, we would expect to get one connection for each host. But that's not what happens. The load balancing policy starts iterating over one list (the initial connector list) and after the first successfull connection it continues iterating over another list (the received topology), so most of the time you would get two connections to the same host and none for one of them. In a scenario like we have here, with two clusters in different locations, it is even worse. We would like to know if we there is an option other than creating a connection factory for each host we want to use, and if we can propose an improvement. We are willing to contribute with the development, if we have an understanding on a possible solution for that problem. Thank you very much. -- View this message in context: http://activemq.2283324.n4.nabble.com/ActiveMQConnectionFactory-use-initial-connectors-instead-of-received-topology-tp4729166.html Sent from the ActiveMQ - User mailing list archive at Nabble.com.
