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());