Remote debugging with mvnDebug, doesn't stop at breakpoint

Question

Inspired by https://stackoverflow.com/a/14853683/286795, I'm trying to remotely debug a Maven project using mvnDebug and IntelliJ. However, the execution doesn't stop on my breakpoints. To reproduce a simple Hello World example:

On the local machine:

git clone https://github.com/LableOrg/java-maven-junit-helloworld.git
cd java-maven-junit-helloworld
mvnDebug test

On the remote machine:

1. Open IntelliJ
2. Check out from Version Control->Git, set URL: https://github.com/LableOrg/java-maven-junit-helloworld.git, Clone
3. Open the project

4. Open Hello.java, set a breakpoint at the line that says printer.println(HELLO);

5. Run->Debug...->Edit Configurations..., Add New Configuration->Remote

6. Set Debugger mode: Attach, Transport: Socket, Host:, Port:8000
7. Apply, Debug

The tests will now run WITHOUT stopping at the breakpoint. Why?

Answer 1

While running the mvnDebug command, use -DforkMode=never.

so your maven command will look like this:

mvnDebug -DforkMode=never -Dmaven.surefire.debug clean install

For more info on -DforkMode=never, read here