A number of customers have upgraded Tomcat 8.5 that comes with Dimensions CM to newer 8.5.x versions in order to resolve some vulnerabilities. However, after Tomcat is upgraded some of the Connectors fail to start up. Tomcat logs include the following errors:
After the upgrade Tomcat memory usage has shot up and it progresses steadily from the time it starts up until it becomes unusable due to slowness and requires restart.
In the attached video we talk about the steps required to convert a custom .war file from the JBoss format to the Tomcat format used in SBM 11.0+. This would only pertain to you if you were using a custom .war