The number of connection from Jboss to Mysql is usually 24 or 25 as normal value. In contains（Resident batch(1or2) + Jboss connection pool(16+6) + check script(1)）but today when we checked the monitor script connection show status, we find the value of「Threads_connected」as 8.
I have checked the detail connection list, there is no problem with the resident batch and the check script connections. I think the number of Jboss connection was dramatically decreased. Could you kindly confirm reason behind this?