Eclipse PHP Tools (PDT) – Problems Debug Port 9000

I like to run Maven Jetty inside Eclipse to debug my Java applications but the other day I came across this error:
FATAL ERROR in native method: JDWP No transports initialized, jvmtiError=JVMTI_ERROR_INTERNAL(113)
ERROR: transport error 202: bind failed: Address already in use ["transport.c",L41]
ERROR: JDWP Transport dt_socket failed to initialize, TRANSPORT_INIT(510) ["debugInit.c",L500]
JDWP exit error JVMTI_ERROR_INTERNAL(113): No transports initialized

It [...]

READ FULL ARTICLE