Bakery App (Vaadin 12) not runnable on WildFly / JBoss in Development Mode

[ManuelAtJEE]

Problem description: Vaadin Bakery App Starter (Vaadin 12) can be deployed in Development Mode on WildFly (15) but only the "Vaadin Subscriptoin" and "Bakery App Starter Install" components are visible.

Reproduce:

• Download Vaadin Bakery App Starter for Flow and Spring (04.02.2019)
• Add 404 logging to CustomRouteNotFoundError:

  @Override
  public int setErrorParameter(BeforeEnterEvent event, ErrorParameter<NotFoundException> parameter) {
      getLogger().info("404: " + parameter.getCustomMessage());
      return HttpServletResponse.SC_NOT_FOUND;
  }

• Deploy "mvn clean install" artifact on (unmodified) WildFly 15
• Open http://localhost:8080/my-starter-project-1.0-SNAPSHOT in Edge or Chrome
• See INFO log messages:

  09:39:29,680 INFO  [ch.coop.manuel.ui.views.errors.CustomRouteNotFoundError] (default task-1) 404: Couldn't find route for 'styles/shared-styles.html'
  09:39:29,716 INFO  [ch.coop.manuel.ui.views.errors.CustomRouteNotFoundError] (default task-2) 404: Couldn't find route for 'src/views/login/login-view.html'

• No other errors are logged!

Additional info:

• The app runs with Spring Boot Runner without problems.
• The app runs in Production Mode on WildFly / JBoss without problems
• This problem is reproducible at least on WildFly 15 and JBoss 7.1.
• In my opinion the problem is located in Vaadin Spring and is not a Spring Boot issue. I successfully ran a Vaadin 10 Bakery App with Spring Boot 2.1.0.RELEASE on JBoss 7.1.

[ManuelAtJEE]

@johannesh2 Have you ever tried running the Bakery App on WildFly / JBoss? Unfortunately, it is a common business usecase.

[svenruppert]

Hi, I had the same issue with Core Undertow. The solution is a changed ResourceManager. The original Undertow took always a dummy ResourceManager. The ClassPathResourceManager was not able to deal with the paths to resolve the resources. Maybe this can help. I isolated this to understand was going on. The source code you can find on github -> Nano Vaadin Demo. Feel free to ping me via Twitter (@SvenRuppert)