Tomcat Parallel deployment second app version

Question

I am trying to do parallel deployment in Tomcat to get Zero downtime. I have read all documentation and what I understand that is almost default option just I need correct version name.

I have in webapps folder app##001.war its running ok. I upload second version to webapps folder app##002.war second version deploy's ok, but my app version in browser do not change.

If I restart Tomcat I get new version of app, but how to get new version without restarting Tomcat. Maybe I'am missing something?

Answer 1

I think maybe parallel deployment is what you need.

It's been supported since Tomcat 7

https://tomcat.apache.org/tomcat-8.0-doc/config/context.html#Parallel_deployment