I 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, 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.