Build job setup to run as "ant.bat -f scm.xml". Ant batch file sets environment variables and kicks off ANT build. While build running, abort is clicked and job aborts normally in Hudson Master as indicated in log/console output:
Build was aborted
Finished: ABORTED

But, on Slave machine, the Ant/Java process doing build still runs to completion, the descendent processes that were running were not killed properly on Slave to truely abort the build.