The min-pool-size setting in the following connection Factory disappears from domain.xml after any code deployments or change made in the console to the queues for the connection factory: <connection-definition class-name="org.apache.activemq.ra.ActiveMQManagedConnectionFactory" jndi-name="java:jboss/activemq/XAConnectionFactory" enabled="true" use-java-context="true" pool-name="ConnectionFactory" min-pool-size="0"></connection>