We have 6.5 AEM Forms JEE + Weblogic + MS SQL Server. Frequently we are unable to login to admin ui using administrator and password. After restarting the managed server, admin server and node manager it works. But it happens mostly on a daily basis. Any idea?
Based on the log shared, please check the value of "enable Test Connections On Reserve" under Admin Console -> Navigate to the Data Source's Configuration -> Connection Pool -> (Advanced) -> check "Test Connections On Reserve"
Restart the node/admin server and monitor for any further issues.
 - ... Caused By: java.sql.SQLException: Attempt to set connection harvestable to false but the connection is already closed.