loopA.shutdown();
// Disable logging temporarily.
Logger root = (Logger) LoggerFactory.getLogger(org.slf4j.Logger.ROOT_LOGGER_NAME);
List<Appender<ILoggingEvent>> appenders = new ArrayList<Appender<ILoggingEvent>>();
for (Iterator<Appender<ILoggingEvent>> i = root.iteratorForAppenders(); i.hasNext();) {
Appender<ILoggingEvent> a = i.next();
appenders.add(a);
root.detachAppender(a);
}