Independent Clusters

Some days ago, I was asked if it's possible to have an Oracle Service Bus (OSB) Domain domain with 2 independent clusters. The answer is no. In a domain you can have one and only one OSB cluster. An OSB cluster can co-exist with other clusters, like a WLS-only clusters, SOA Suite cluster, etc., but not with another OSB cluster. As a matter of fact, in this case, the observed behavior was that all services were assigned to the first created OSB cluster, and the newer one was not responding the URL calls. Works as designed.

However, for a WLS domain, is it possible to have 2 independent clusters? In this case, the answer is yes. Here you can check what types of objects can be clustered and what cannot be clustered.

The following types of objects can be clustered in a WebLogic Server deployment:
  • Servlets
  • JSPs
  • EJBs
  • Remote Method Invocation (RMI) objects
  • Java Messaging Service (JMS) destinations
The following APIs and internal services cannot be clustered in WebLogic Server:
  • File services including file shares
  • Time service
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About


Principal Technical Support Engineer in the Engineered (Systems) Enterprise Support Team - EEST.
Former member of the Coherence and Java Technologies Support Teams.

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