In OAM 14.1.2.1.0, server-side session management uses the database and does not require coherence cluster to be established. In some environments, warnings and errors are observed due to default coherence cluster initialized by WebLogic. To avoid or fix these errors, exclude all of the OAM clusters from default WebLogic Server coherence cluster using the following steps:

1. Connect to the OAM Administration Server in the WebLogic Remote Console.
2. In the left pane of the console, expand Environment and select Coherence Clusters System Resources.
3. Click defaultCoherenceCluster and select the Members tab.
4. From Servers and Clusters, deselect all OAM clusters (oam_cluster and policy_cluster).
5. Click Save.
6. Click the Shopping Cart in the top right of the console, and click Commit Changes.