try {
defaultMQAdminExt.start();
String topic = commandLine.getOptionValue('t').trim();
TopicStatsTable topicStatsTable = defaultMQAdminExt.examineTopicStats(topic);
List<MessageQueue> mqList = new LinkedList<MessageQueue>();
mqList.addAll(topicStatsTable.getOffsetTable().keySet());
Collections.sort(mqList);