In a multi-server deployment, there is only one master ActiveMQ. If the master ActiveMQ fails, the dormant ActiveMQ takes over the failed server and ensures no functional impact.

If the master ActiveMQ process fails ungracefully, another ActiveMQ becomes master after 2 minutes and 20 seconds of the failover time.

During the failover time of 2 minutes and 20 seconds, Java Message Service (JMS) publish events stop working.