Problem
In the event of a partial outage of Access Manager (on some, but not all instances of the cluster), end users might see intermittent login and logout failures.
Workarounds
Remove OHS from the deployment
Configure the OHS cluster such that each OHS instance is pinned to a WebLogic Server instance.
The WebLogic Server container with the malfunctioning Access Manager application must be removed from service (shutdown) and brought back up upon recovery.