We are running CUCM version: 188.8.131.5200-7 and encountered the issue (Problem 5 as described in this Cisco Document) recently. We have tried restarting Cisco Tomcat Service and rebooted both Publisher & Subscriber but issue persists.
Checked and verified CPU and memory load is fine. However, tomcat_sessions test failed as seen below.
Went through the tomcat logs (see attached) but still could not figure out where and what is the root cause. Any suggestions would be appreciated!