https://issues.apache.org/jira/browse/AMQ-3654 - JDBC Master/Slave : Slave cannot acquire lock when the master loose database connection. Adding an leasebasedlocker that can survive db disconnect, and jdbcioexceptionhandler that will pause/resume transports on db outage
activemq/trunk/activemq-core/src/main/java/org/apache/activemq/ActiveMQMessageConsumer.java