This week's book giveaway is in the Spring forum. We're giving away four copies of Pro Spring MVC with WebFlux: Web Development in Spring Framework 5 and Spring Boot 2 and have Marten Deinum & Iuliana Cosmina on-line! See this thread for details.
About the only thing I can suggest is to ask if you are restarting Apache AFTER you restart Tomcat. Apache opens a tcp/ip pipeline and if Tomcat goes down and back up, Apache is supposed to have to be restarted so it connect to the new Tomcat's sockets.
Loudly announcing something is true and finding out you're wrong makes you feel foolish.
Finding out you're wrong and refusing to admit it makes you LOOK foolish.