I am using SpringBoot v2.0.2 with Webflux which uses Netty server and Camunda Started 3.0.0
I was getting a NPE while calling BpmPlatform.getDefaultProcessEngine.
Aparently, Camunda Spring Boot Starter is relying on some Apache Tomcat libs that are stripped out from the Starter. To solve that issue I added the Apache Tomcat starter dependency in my build.gradle file.
That behaviour is unexpected as you can run Spring Boot on Netty or Jetty.