Chapter 14. Debugging your Quarkus project

Control the debugger through system properties

1. Change one of the following values of the debug system property where PORT is the port that the debugger is listening on:

   • false: The JVM starts with debug mode disabled.
   • true: The JVM starts in debug mode and is listening on port 5005.
   • client: The JVM starts in client mode and tries to connect to localhost:5005.
   • PORT: The JVM starts in debug mode and is listening on PORT.

2. Change the value of the suspend system property. This property is used when Quarkus starts in debug mode.

   • y or true: The debug mode JVM launch suspends.
   • n or false: The debug mode JVM starts without suspending.

Control the debugger from the command line

1. To start your Quarkus application in debug mode with JVM, enter the following command:

   ./mvnw compile quarkus:dev -Ddebug

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2. Attach a debugger to localhost:5005.