Hi Aaron, there are no direct notification messages generated for cluster’s topology changes. The management API to get list of nodes in the cluster’s topology is org.apache.activemq.artemis.api.core.management.ActiveMQServerControl.listNetworkTopology() [1], see the management documentation [2].
[1] https://github.com/apache/activemq-artemis/blob/2.21.0/artemis-core-client/src/main/java/org/apache/activemq/artemis/api/core/management/ActiveMQServerControl.java#L1846 [2] https://activemq.apache.org/components/artemis/documentation/latest/management.html Regards, Domenico On Mon, 4 Apr 2022 at 04:35, Steigerwald, Aaron <asteigerw...@brandesassociates.com.invalid> wrote: > Hello, > > Do any of the ActiveMQServerPlugin methods get called for all live nodes > when a cluster’s topology changes, such as when one master node crashes and > its slave becomes live? Are any management notification messages generated > for the same situation? I looked in the code and it looks like the > CLUSTER_CONNECTION_STOPPED notification is generated on the broker that is > removed from a cluster gracefully, but it doesn’t look like the same > message is generated for other nodes in the cluster. > > Also, what broker Java method provides the current active (live and > standby) nodes in the cluster’s topology? > > Thank you, > Aaron Steigerwald >
