OCI-41462
Oracle Application Continuity (FAILOVER_TYPE = TRANSACTION) is not enabled on your session.
Cause
This was an ACCHK message. Application Continuity requires request boundaries. An Oracle connection pool was not used by the application.
Action
Use an Oracle connection pool and return the connections to the connection pool between usages.
Alternatively, consider using Transparent Application Continuity (FAILOVER_TYPE = AUTO).