The Qpid JMS connection factory supports a "failover" connection URI that can list multiple brokers. If a connection factory is used to obtain successive connections then, by default, the multiple brokers are tried sequentially until one succeeds.

In a master/slave broker set-up, it is perfectly normal that some of the brokers listed in a URI are unavailable some of the time. Although the connection factory does connect successfully to the next available broker, it will output a message for each broker it has to try before it succeeds. The OpenWire (ActiveMQ) client does not do this – an error message is produced if none of the brokers is available, otherwise there is no logging.

The behaviour of Qpid JMS does not prevent normal broker operation – it just fills the log with scary and misleading warning messages.