Just about to embark on an upgrade of a large Grails 2.2.5 application to Grails 4 (maybe 4.1 by the time it's complete). What are the latest versions of Java and Tomcat which provide a good stable working system with the latest Grails 4? A few months back I used Tomcat 9 and Java 11, but I'm wondering whether things have moved on at all since then.
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