If you are using org.apache.activemq.pool.PooledConnectionFactory for ActiveMQ connection pooling, it is maybe frustrating to detect server connection problems as it does not log anything at INFO level. DEBUG level contains reconnection records, but also a lot of unnecessary, boring stuff, not needed for production. Fortunately, there is logger that can be used for connections monitoring, which is not nicest, but working solution, and definitely it is better than nothing:
debug 'org.apache.activemq.util.ThreadPoolUtils'
