nsctrl.setTraceDirectory(derbySystemHome);
nsctrl.trace(true);
nsctrl.ping();
assertTrue(fileExists(derbySystemHome+"/Server3.trace"));
nsctrl.trace(false);
// now try on a directory where we don't have permission
// this won't actually cause a failure until we turn on tracing.
// assume we don't have permission to write to root.
nsctrl.setTraceDirectory("/");