Running a quarkus application with debug mode does not suspend the vm

When running a quarkus application with maven and the debug property as described in https://quarkus.io/guides/maven-tooling#debugging the vm does not wait for a debugger to attach.

Expected behavior The VM should be suspended until a debugger is attached.

Actual behavior The application starts without suspending the VM.

To Reproduce

1. Create simple quarkus application:

mvn io.quarkus:quarkus-maven-plugin:0.24.0:create \
    -DprojectGroupId=org.acme \
    -DprojectArtifactId=getting-started \
    -DclassName="org.acme.quickstart.GreetingResource" \
    -Dpath="/hello"

1. Run the application in dev mode with maven debug property:

./mvnw compile quarkus:dev -Ddebug=true

1. Check is application is running:

wget localhost:8080/hello

Environment:

• Output of uname -a or ver:

Linux tmplcl-Virtual-Machine 5.0.0-31-generic #33-Ubuntu SMP Mon Sep 30 18:51:59 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

• Output of java -version:

openjdk version “1.8.0_222” OpenJDK Runtime Environment (build 1.8.0_222-20190711120915.buildslave.jdk8u-src-tar–b08) OpenJDK 64-Bit GraalVM CE 19.2.0.1 (build 25.222-b08-jvmci-19.2-b02, mixed mode)

• Quarkus version or git rev: 0.24.0

Additional context Same behaviour with OpenJDK: 11 and 13

[geoand]

Yes, let’s at least have some documentation

[gsmet]

Thanks everyone!