words.jar throws Error when running

[Kvoo]

I'm currently following the basic training on your website. On the first Excercise, we have to compile and run words.jar.

When running it however, it will throw the following error:
root@69eb0c1f8f09:/usr/words/target# java -Xmx8m -Xms8m -jar words.jar Error: Could not find or load main class Main Caused by: java.lang.ClassNotFoundException: Main

Tried it in interactive mode just to test. Is there some incompatibility with the latest default-jre package?

[jpetazzo]

What does your Dockerfile look like?

There is a good chance that you're doing something like COPY src . (instead of COPY . . or COPY src src), which causes the source code to be in the wrong directory. Maven will then assemble a JAR file that contains some basic stuff (and fetch dependencies as it should) but it won't build and include the app source code.