Configure messaging engine failover for mixed version clusters

A messaging engine that is hosted on a WAS v7 or later server cannot fail over to a messaging engine that is hosted on a WAS v6 server. If we have a cluster bus member that consists of a mixture of Version 6 and Version 7.0 or later servers, you must make sure the high availability policy is configured to prevent this type of failover.

To prevent failover of a Version 7.0 or later messaging engine to a Version 6 server, configure the high availability policy for the messaging engine so that the cluster is effectively divided into one set of servers for Version 6 and another set of servers for Version 7.0 or later, and the Version 7.0 or later messaging engine is restricted to the servers at Version 7.0 or later.

Make sure the high availability policy is configured to prevent Version 7.0 or later messaging engines from failing over to messaging engines hosted on a Version 6 server. For information about configuring messaging engines for high availability see Configure high availability and workload sharing of service integration.

Related concepts

Service integration high availability and workload sharing configurations

Related information:

Messaging engine troubleshooting tips