The default JPDA options are as follows:
If you change the value of suspend=y, the JVM starts in suspended mode and stays suspended until a debugger attaches to it. Use this option if you want to start debugging as soon as the JVM starts.
To specify the port to use when attaching the JVM to a debugger, specify address=port_number. You can also use the shared memory transport dt_shmem on the Win32 platform.
For more information on list of JPDA debugging options, see