log.error("Error sending data over ...");
System.err.println("Error sending data over ...");
            public void run() {                try {                    for(int i=0; i < msgCount; i++) {                        channel.send(null, null, new byte[payloadSize]);                        if(i % 5000 == 0)                            System.out.println("-- sent " + i);                    }                }                catch(Exception e) {                    log.error("Error sending data over ...");                    e.printStackTrace();                }            }