From time to time, on any server, we have the error message "Number of plugin / javax users exceeded (Package 20013)" and some users can not connect anymore.
The last time this happened, 11 workstations were connected to the server and despite a license of 12 x 20013, the twelfth station could not connect.
We did some investigation on the Linux server with ps, netstat, and in the /proc directory and found that all the pxplus processes were those of the 11 workstations, without understanding why we get this error message.
Only a reboot of the server corrected the problem, sometimes this can be very annoying.
In this kind of case, it would be interesting to have a tool giving precise information on the use of the license with a list of ip addresses, process numbers ...