SpringBoot 2 debug using the Gradle plugin

Question

I am trying to remote debug a Spring Boot 2.0 web application, built and run with the new Spring Boot Gradle plugin. I've read that the way to go is to pass the --debug-jvm option like so:

./gradlew bootRun --debug-jvm

But I get the following:

Problem configuring task :bootRun from command line.
> Unknown command-line option '--debug-jvm'.

Has something changed in Spring Boot 2.0 or am I missing something? The new gradle plugin reference does not mention anything regarding debug.

I am running Spring Boot and spring-boot-gradle-plugin version 2.0.0.M6, gradle version 4.3.1.

Answer 1

The following would work:

1. Edit build.gradle bootRun { jvmArgs = ["-agentlib:jdwp=transport=dt_socket,server=y,address=8000,suspend=n"] }
2. Execute./gradlew bootRun
3. Attach the debugger after the Spring Boot application has started (port 8000 in the specific case)