Does Oracle Workflow 2.6.3.5 support Oracle Real Application Clusters?
Yes. Oracle Workflow 2.6.3 supports Oracle Real Application Clusters, which enable out-of-the-box, near-linear scaling transparency. Oracle Real Application Clusters provide transparent application scalability by quickly and efficiently sharing frequently accessed data across all the servers in a cluster, resolving all manners of contention between servers in the process. Please make sure the TNS descriptions you provide when installing and configuring Oracle Workflow are RAC entries.