Hello...
I have a couple of basic questions on ActiveMQ. I would appreciate any hits as I am stuck. I am using ActiveMQ 4.1 with JDK6. 1) When I use an embedded broker with vm transport (vm://localhost) the instantiation of my Spring SimpleMessageListenerContainer always fails with a JournalLockedException. What does this exception mean exactly? I understand this has something to do with persistance of message (since that is on by default). While I do not care to enable persistance and would like to turn it off, I would still like to understand what causes this exception: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'DmmStartupMessageListener' defined in class path resource [contexts/bus/DmsStandardSubscriptions.xml]: Invocation of init method failed; nested exception is java.lang.NoClassDefFoundError: org/apache/activeio/journal/active/JournalLockedException Caused by: java.lang.NoClassDefFoundError: org/apache/activeio/journal/active/JournalLockedException at org.apache.activemq.broker.BrokerService.createPersistenceFactory(BrokerService.java:1328) at org.apache.activemq.broker.BrokerService.getPersistenceFactory(BrokerService.java:544) at org.apache.activemq.broker.BrokerService.createPersistenceAdapter(BrokerService.java:1320) at org.apache.activemq.broker.BrokerService.getPersistenceAdapter(BrokerService.java:631) at org.apache.activemq.broker.BrokerService.createRegionBroker(BrokerService.java:1250) at org.apache.activemq.broker.BrokerService.createBroker(BrokerService.java:1209) at org.apache.activemq.broker.BrokerService.getBroker(BrokerService.java:508) at org.apache.activemq.broker.BrokerService.start(BrokerService.java:394) at org.apache.activemq.transport.vm.VMTransportFactory.doCompositeConnect(VMTransportFactory.java:113) at org.apache.activemq.transport.vm.VMTransportFactory.doConnect(VMTransportFactory.java:52) at org.apache.activemq.transport.TransportFactory.doConnect(TransportFactory.java:43) at org.apache.activemq.transport.TransportFactory.connect(TransportFactory.java:77) at org.apache.activemq.ActiveMQConnectionFactory.createTransport(ActiveMQConnectionFactory.java:227) 2) Which jarfile contains the exception class org/apache/activeio/journal/active/JournalLockedException? 3) How do I use an embedded broker without persistance? The URL vm://localhost?persistant=false fails with an exception that says that the option is illegal. 4) Once the broker is up, could I dynamically (programmatically) change the broker URL by augmenting the broker URL with a failover URL as follows? Startup: vm://localhost During runtime (after an event): failover(vm://localhost,tcp://remote:61616) Would modifying the broker URL of the connection factory cause problems? Thanks, /U