In Jacorb 3.6, in class PortRangeSocketFactory, there remains a call to the printStackTrace method which floods our console with exceptions in cases we hit a firewall or a server did not start.
See line 177 in method doCreateSocket:

            catch (IOException ex)
            {
==>             ex.printStackTrace();
                tryToClose(socket);
            	if (useTimeout && System.currentTimeMillis() > expireTime)
            	{
            		throw new TIMEOUT("couldn't open socket within " + timeout + ". Last exception details: " + ex.toString());
            	}
            }

This call should be removed.