There is a mistake in https://www.jboss.org//tools/docs/testing#remote article:
Wrong command in Remote Debugging paragraph:
cd ~/trunk/jmx/tests/org.jboss.tools.jmx.core.test; mvn clean install -DdebugPort 8000
It should be:
cd ~/trunk/jmx/tests/org.jboss.tools.jmx.core.test; mvn clean install -DdebugPort=8000