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());
文章来自:https://www.cnblogs.com/yaohaitao/p/12172867.html
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