https://issues.apache.org/jira/browse/AMQ-2524 and https://issues.apache.org/jira/browse/AMQ-3092 - two competing fixes for the same underlying issue. Use a combination of the changes, disposed without the duplicate check for existance in the destinations. Removes one additional query on the destinations map
activemq/trunk/activemq-core/src/main/java/org/apache/activemq/broker/region/RegionBroker.java