https://issues.apache.org/jira/browse/AMQ-3455: Broker may deadlock when creating queues under load with wildcard consumers - remove unnecessary class sync that results in lock order acquisition problem - related to https://issues.apache.org/jira/browse/AMQ-3197 sync on create. Additional test with concurrent producers/consumers on wildcards reproduces
activemq/trunk/activemq-core/src/main/java/org/apache/activemq/broker/region/virtual/VirtualDestinationInterceptor.java