Java 卡夫卡消费者坚持加入集群

我将Kafka与消费者API（v.0.10.0.0）一起使用。卡夫卡正在Docker中使用来自

此外，我正在运行这个简单的测试：

@Test
  public void test2() {

    Properties props = new Properties();
    props.put("bootstrap.servers", "localhost:9092");
    props.put("group.id", RandomStringUtils.randomAlphabetic(8));
    props.put("auto.offset.reset.config", "earliest");
    props.put("enable.auto.commit", "false");
    props.put("key.deserializer", "org.apache.kafka.common.serialization.StringDeserializer");
    props.put("value.deserializer", "org.apache.kafka.common.serialization.StringDeserializer");

    KafkaConsumer<String, String> consumer = new KafkaConsumer<String, String>(props);
    Properties props1 = new Properties();
    props1.put("bootstrap.servers", "localhost:9092");

    props1.put("key.serializer", "org.apache.kafka.common.serialization.StringSerializer");
    props1.put("value.serializer", "org.apache.kafka.common.serialization.StringSerializer");

    KafkaProducer<String, String> producer1 = new KafkaProducer<>(props1);
    KafkaProducer<String, String> producer = producer1;

    consumer.subscribe(asList(TEST_TOPIC));

    producer.send(new ProducerRecord<>(TEST_TOPIC, 0, "key", "value message"));
    producer.flush();


    boolean done = false;
    while (!done) {
      ConsumerRecords<String, String> msg = consumer.poll(1000);
      if (msg.count() > 0) {
        Iterator<ConsumerRecord<String, String>> msgIt = msg.iterator();
        while (msgIt.hasNext()) {
          ConsumerRecord<String, String> rec = msgIt.next();
          System.out.println(rec.value());
        }
        consumer.commitSync();
        done = true;
      }
    }

    consumer.close();
    producer.close();
  }

---

有人知道发生了什么事吗？对我来说，这似乎是一个相当简单的设置/测试…

我自己找到了原因。因此，我在一个只有1个分区的主题上运行消费者。然后，我只是终止了与消费者的进程，因此没有干净的关机

在这种情况下，代理将为消费者保留现场，直到会话到期。尝试加入另一个消费者会导致该错误，直到过期

要解决这个问题，我们可以： -更改组Id -等待会话到期 -重新启动代理（？）

如果有人有更多的知识可以更好地解释，请这样做

2017-04-20 12:01:46 DEBUG NetworkClient:476 - Completed connection to node 1003
2017-04-20 12:01:46 DEBUG NetworkClient:640 - Sending metadata request {topics=[ByjSIH]} to node 1003
2017-04-20 12:01:46 DEBUG Metadata:180 - Updated cluster metadata version 3 to Cluster(nodes = [192.168.100.80:9092 (id: 1003 rack: null)], partitions = [Partition(topic = ByjSIH, partition = 0, leader = 1003, replicas = [1003,], isr = [1003,]])
2017-04-20 12:01:46 DEBUG AbstractCoordinator:476 - Sending coordinator request for group RHAdpuiv to broker 192.168.100.80:9092 (id: 1003 rack: null)
2017-04-20 12:01:46 DEBUG AbstractCoordinator:489 - Received group coordinator response ClientResponse(receivedTimeMs=1492686106738, disconnected=false, request=ClientRequest(expectResponse=true, callback=org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient$RequestFutureCompletionHandler@2bea5ab4, request=RequestSend(header={api_key=10,api_version=0,correlation_id=3,client_id=consumer-1}, body={group_id=RHAdpuiv}), createdTimeMs=1492686106738, sendTimeMs=1492686106738), responseBody={error_code=15,coordinator={node_id=-1,host=,port=-1}})
2017-04-20 12:01:46 DEBUG NetworkClient:640 - Sending metadata request {topics=[ByjSIH]} to node 1003
2017-04-20 12:01:46 DEBUG Metadata:180 - Updated cluster metadata version 4 to Cluster(nodes = [192.168.100.80:9092 (id: 1003 rack: null)], partitions = [Partition(topic = ByjSIH, partition = 0, leader = 1003, replicas = [1003,], isr = [1003,]])
2017-04-20 12:01:46 DEBUG AbstractCoordinator:476 - Sending coordinator request for group RHAdpuiv to broker 192.168.100.80:9092 (id: 1003 rack: null)
2017-04-20 12:01:46 DEBUG AbstractCoordinator:489 - Received group coordinator response ClientResponse(receivedTimeMs=1492686106840, disconnected=false, request=ClientRequest(expectResponse=true, callback=org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient$RequestFutureCompletionHandler@3d8314f0, request=RequestSend(header={api_key=10,api_version=0,correlation_id=5,client_id=consumer-1}, body={group_id=RHAdpuiv}), createdTimeMs=1492686106839, sendTimeMs=1492686106839), responseBody={error_code=15,coordinator={node_id=-1,host=,port=-1}})
2017-04-20 12:01:46 DEBUG NetworkClient:640 - Sending metadata request {topics=[ByjSIH]} to node 1003
2017-04-20 12:01:46 DEBUG Metadata:180 - Updated cluster metadata version 5 to Cluster(nodes = [192.168.100.80:9092 (id: 1003 rack: null)], partitions = [Partition(topic = ByjSIH, partition = 0, leader = 1003, replicas = [1003,], isr = [1003,]])
2017-04-20 12:01:46 DEBUG AbstractCoordinator:476 - Sending coordinator request for group RHAdpuiv to broker 192.168.100.80:9092 (id: 1003 rack: null)
2017-04-20 12:01:46 DEBUG AbstractCoordinator:489 - Received group coordinator response ClientResponse(receivedTimeMs=1492686106941, disconnected=false, request=ClientRequest(expectResponse=true, callback=org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient$RequestFutureCompletionHandler@2df32bf7, request=RequestSend(header={api_key=10,api_version=0,correlation_id=7,client_id=consumer-1}, body={group_id=RHAdpuiv}), createdTimeMs=1492686106940, sendTimeMs=1492686106940), responseBody={error_code=15,coordinator={node_id=-1,host=,port=-1}})
2017-04-20 12:01:47 DEBUG NetworkClient:640 - Sending metadata request {topics=[ByjSIH]} to node 1003
2017-04-20 12:01:47 DEBUG Metadata:180 - Updated cluster metadata version 6 to Cluster(nodes = [192.168.100.80:9092 (id: 1003 rack: null)], partitions = [Partition(topic = ByjSIH, partition = 0, leader = 1003, replicas = [1003,], isr = [1003,]])
2017-04-20 12:01:47 DEBUG AbstractCoordinator:476 - Sending coordinator request for group RHAdpuiv to broker 192.168.100.80:9092 (id: 1003 rack: null)
2017-04-20 12:01:47 DEBUG AbstractCoordinator:489 - Received group coordinator response ClientResponse(receivedTimeMs=1492686107042, disconnected=false, request=ClientRequest(expectResponse=true, callback=org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient$RequestFutureCompletionHandler@530612ba, request=RequestSend(header={api_key=10,api_version=0,correlation_id=9,client_id=consumer-1}, body={group_id=RHAdpuiv}), createdTimeMs=1492686107041, sendTimeMs=1492686107041), responseBody={error_code=15,coordinator={node_id=-1,host=,port=-1}})
2017-04-20 12:01:47 DEBUG NetworkClient:640 - Sending metadata request {topics=[ByjSIH]} to node 1003
2017-04-20 12:01:47 DEBUG Metadata:180 - Updated cluster metadata version 7 to Cluster(nodes = [192.168.100.80:9092 (id: 1003 rack: null)], partitions = [Partition(topic = ByjSIH, partition = 0, leader = 1003, replicas = [1003,], isr = [1003,]])
2017-04-20 12:01:47 DEBUG AbstractCoordinator:476 - Sending coordinator request for group RHAdpuiv to broker 192.168.100.80:9092 (id: 1003 rack: null)
2017-04-20 12:01:47 DEBUG AbstractCoordinator:489 - Received group coordinator response ClientResponse(receivedTimeMs=1492686107144, disconnected=false, request=ClientRequest(expectResponse=true, callback=org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient$RequestFutureCompletionHandler@2a40cd94, request=RequestSend(header={api_key=10,api_version=0,correlation_id=11,client_id=consumer-1}, body={group_id=RHAdpuiv}), createdTimeMs=1492686107144, sendTimeMs=1492686107144), responseBody={error_code=15,coordinator={node_id=-1,host=,port=-1}})
2017-04-20 12:01:47 DEBUG NetworkClient:640 - Sending metadata request {topics=[ByjSIH]} to node 1003