JDE Security Kernel user lists growing fast after 9.1.5.5 Tools Upgrade

Recently we have upgraded Tools Release from 9.1.3 to 9.1.5.5, after upgrade we have seen our security kernels user list are growing very fast, our Enterprise server is AS400 V7R1, this is happening only after 9.1.5.5 upgrade. All users IDs from JAS server are clearing out in a day as per UserListCleanupInterval setting which is already having value 20 minutes as default, but any connection from Enterprise server & third party scheduler which is directly connecting to Enterprise server through JDE user ID are not clearing up from security kernel.

Here is what we have seen:

1. When we login JDE using AS it is putting security kernel entry for user name with host name as JAS server machine name after that when I invoke any records from application (Eg: P01012) it is adding one more security records with user name and host name as Enterprise server