Consuming JMS Messages Concurrently from the webMethods Broker

Queues. Multiple clients can connect to and receive messages from the same queue if the queue is configured to share state and all the clients use the same client ID.

Topics. Multiple clients can consume messages in a load-balanced fashion if the clients are connecting to a durable subscriber, state sharing is enabled for the durable subscriber, and all the clients use the same client ID.

Note:
Non-durable subscribers (i.e., JMS triggers that subscribe to topics but do not specify a durable subscriber) cannot receive messages in a load-balanced fashion. A JMS trigger using a non-durable subscriber will process duplicates. Therefore, make sure to set Max execution threads to 1 when setting message processing properties for a JMS trigger that specifies a non-durable subscriber. This behavior may vary with other JMS providers. For more information about configuring message processing, see webMethods Service Development Help.