Spring version conflicts in 6.3.1?

Flowable Engine
1

Hi all. I am trying to use the flowable-spring-boot-starter package.

But I get a ClassNotFoundException when I try to run it. I removed all extra stuff from my app, leaving only the dependencies and code required to start up a flowable engine based on spring configuration, and the problem still persists.

This gist (https://gist.github.com/mac01021/a56a3d6f70ab1d4c0ee8c057a24da038) contains my minimal pom.xml and java program, as well as the exception’s stack trace.

Any help is appreciated.

As you can see from the pom file, I am depending on flowable-spring-boot-starter 6.3.1. I notice that this package depends on many others, both spring packages and flowable packages. I also notice that almost everything pulled in by this package depends on spring version 5.0.6.RELEASE, but one of the dependencies (flowable-app-engine-spring:6.3.1) pulls in spring-context4.3.14.RELEASE. The end result of this is that maven pulls in spring-core:5.0.6 and spring-context:4.3.14 at the same time and I suspect that this might be the cause of the issue.

But this is the dependency tree that came along with flowable-spring-boot-starter, it’s not set up by me. So I wonder if I am doing anything wrong.

Thanks again.

2

Hi mac01021,
have you tried to use a spring boot pom.xml and add the flowable starter to this one? Right now you don’t have spring-boot imports and all and also no parent pom which is defining the versions. I think best would be to go to https://start.spring.io and add to the generated project flowable and the database driver.

Kind regards,
Valentin

3

Thanks, Valentin. I’ll try this.

I’ll note, though, that this is not the procedure described in the Flowable Userguide.

Thanks again.