spring-jms

I have 2 spring-boot applications. Each application has embedded active mq broker. I need to have 2 applications working on the same PC in parallel but it doesn't work now. First application always starts successfully: 2018-02-02 11:48:20.095 INFO 7660 --- [ main] s.c.a.AnnotationConfigApplicationContext : Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext@53045c6c: startup date [Fri Feb 02 11:48:20 MSK 2018]; root of context hierarchy 2018-02-02 11:48:20.923 INFO 7660 --- [ JMX connector] o.a.a.broker.jmx.ManagementContext : JMX consoles can connect to

I was reading spring documentation on DefaultMessageListenerContainer It says "Note: Don't use Spring's CachingConnectionFactory in combination with dynamic scaling. Ideally, don't use it with a message listener container at all, since it is generally preferable to let the listener container itself handle appropriate caching within its lifecycle. Also, stopping and restarting a listener container will only work with an independent, locally cached Connection - not with an externally cached one." Could anybody explain why? You really don't need to cache sessions for listener containers because