[EMAIL PROTECTED] wrote:
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?
Personally, I'm not sure if you can I haven't tried it, but I don't
think it makes sense to make a vm transport failover. The assumption is
that you have a broker running in the same vm as your jms client. If the
broker crashes, it means your client *should* have crashed also and it
can't failover over to a remote broker anymore.
Thanks,
/U
!DSPAM:507,4606f652307602068143078!
