kafka的暂停消费和重新开始消费问题

//暂停kafka的消费 暂停分区的分配
consumer.unsubscribe();//此处不取消订阅暂停太久会出现订阅超时的错误
consumer.pause(consumer.assignment());



//重新消费分区,此处不重新分配会出错

this.open(null,null,null);

    if (null == consumer) {
         Properties props = new Properties();
         props.put("bootstrap.servers", PropertiesUtil.getValue("bootstrap.servers"));
         // 消费者的组id
         props.put("group.id", constant.kafka_groupName);//Spider2
         props.put("enable.auto.commit", "false");
//       max.poll.interval.ms(官网给得默认值为3000)的意思为，当我们从kafkaServer端poll消息时，poll()的调用之间的最大延迟。
//       这提供了消费者在获取更多记录之前可以空闲的时间量的上限。 如果在此超时到期之前未调用poll()，则认为使用者失败，并且消费
//       者组将重新平衡以便将分区重新分配给其他消费者，而恰好这里我们设置了Thread.sleep(6000) > max.poll.interval.ms值，
//       也就是我们在手动提交的时候，实际上分区信息已经被分配到整个消费者组里面的其它消费者了       
         props.put("auto.commit.interval.ms", "3000");
         // 从poll(拉)的回话处理时长
         props.put("session.timeout.ms", "100000");
         props.put("request.timeout.ms", "200000");
         props.put("max.poll.records", "2");
         // poll的数量限制
         // props.put("max.poll.records", "100");
         /* props.put("key.deserializer", "org.apache.kafka.common.serialization.StringDeserializer");
         props.put("value.deserializer", "org.apache.kafka.common.serialization.StringDeserializer");*/
         props.put("key.deserializer", StringDeserializer.class.getName());
         props.put("value.deserializer", StringDeserializer.class.getName());
         props.put("group.name", UUID.randomUUID().toString().replaceAll("-", ""));
         consumer = new KafkaConsumer<String, String>(props);
      
         // 订阅主题列表topic
         //consumer.subscribe(Arrays.asList("test_input"));
         }
      //注册kafka rebalanceListener
      //consumer.subscribe(Arrays.asList("test_etl"), new ConsumerRebalanceListener(){
      
       listener = new ConsumerRebalanceListener(){
         @Override
         public void onPartitionsRevoked(Collection<TopicPartition> partitions) {
            System.out.printf("threadId = {}, onPartitionsRevoked.", Thread.currentThread().getId());
            consumer.commitSync(offsetsMap);
            consumer.commitSync();
         }
         @Override
         public void onPartitionsAssigned(
               Collection<TopicPartition> partitions) {
            System.out.printf("threadId = {}, onPartitionsAssigned.", Thread.currentThread().getId());
            consumer.commitSync();
            offsetsMap.clear();
         }};
      
      consumer.subscribe(Arrays.asList(topicName.split(",")[0],topicName.split(",")[1],topicName.split(",")[2]), listener);

consumer.resume(consumer.assignment());