alt Hacker NewsI thought that was Tomcat or was Tomcat just the servlet reference implementation, i can't remember. App servers like Glassfish were what operations people used before the concept of "devops". Developers wrote the code and admins/ops deployed the code on app servers like Glassfish. Devops was supposed to put developers in charge of the whole stack but every enterprise i've seen have a dedicated devops team that manages AWS/Azure/GCP and separate developer teams who write the code. So it's pretty much the same it's always been ironically.
> I thought that was Tomcat or was Tomcat just the servlet reference implementation
Tomcat itself has never been an official reference implementation of anything.
Tomcat implements various Jakarta EE APIs, most centrallly Servlet indeed, but also JSP (Jakarta Pages) and JSTL (Jakarta Tags), WebSockets and Jakarta Authentication.
The initial Tomcat was donated to Apache, then used back in GlassFish. GlassFish WAS the reference implementation of Servlet (among others), so indirectly Tomcat kinda was the reference implementation indeed. But just a fork of its code via GlassFish.