I’d like to set up a publisher-subscriber based communication protocol between a server producing messages and many clients receiving them. After a bit of research, I decided to go with ActiveMQ. I looked at a few tutorials and the ActiveMQ site and set up the broker as follows:
BrokerService broker = new BrokerService();
broker.setPersistent(false);
broker.addConnector("tcp://localhost:61616");
broker.start();
I only need the message passing functionality, no database persistence or anything alike. However, when I start the application, a activemq-data folder is created regardless of the the configuration. This in turn causes an exception the next time I start the broker.
SEVERE: Failed to start ActiveMQ JMS Message Broker. Reason: java.io.EOFException: Chunk stream does not exist at page: 0
Is this a bug or am I not setting up the broker correctly (using ActiveMQ 5.4.1)? How can I disable persistence, so the additional data storage is not created? Also, I prefer to configure the broker from within the Java application and not through an xml file.
Cheers,
Max
This is not normal behaviour but a bug in KahaDB (the default persistence store in Activemq)
You can see info on Bug 2935 of ActiveMQ.
You could solve this by choosing a different persistence engine, although i strangly had this problem a couple of times and then it dissapeared