It looks like you’re dealing with a JDBC connection leak issue in a Glassfish application server. Here’s a summary of the steps you can take to monitor and identify the leak:

Enable Monitoring: Go to Configurations -> server-config -> Monitoring. Check the Enabled checkbox next to the Monitoring Service. Set the monitoring level to HIGH for the JDBC Connection Pool.

Check Monitored Data: Navigate to the Monitor tab in the server link. Go to the Resources tab to view JDBC Connection Pool data. Look for high values in WaitQueueLength, indicating many connection requests are queued.

Enable Connection Leak Monitoring: Go to the Advanced tab of the connection pool. Set a non-zero value for Leak Timeout to enable leak monitoring.

These steps should help you identify and address the connection leak issue.