IBM BJ0NJML Integration Guide - Page 206
WebSphere Application Server Sequential Queue Cluster
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JMS Queues WebSphere Application Server Sequential Queue Cluster The following diagram shows one example of a cluster configuration on the WebSphere Application Server. The sequential queue receives JMS producer messages and processes the JMS consumer messages. ATTENTION A sequential queue integration bus cluster consists of three application servers and one message engine on a single application server. Do not implement the sequential queue on the continuous queue integration bus. When you use the continuous queue integration bus for sequential queue implementations, messages may be unprocessed or may be processed out of order. The load balancer directs the application server to drop enterprise service messages into the sequential queue. When messages are in the queue, the application server that is running the JMS consumer cron task processes messages sequentially. 192 Integration Guide
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