spring-kafka用户在一段时间后停止使用消息。停顿每次都会发生，但绝不会在同一时间发生。当不再使用app时，在日志末尾，我总是看到消费者发送LEAVE_GROUP信号的语句。如果我没有看到任何错误或异常，那么为什么消费者离开小组？
org.springframework.boot:spring-boot-starter-parent:2.0.4.RELEASE
spring-kafka:2.1.8.RELEASE
org.apache.kafka:kafka-clients:1.0.2
我已将日志记录设置为 logging.level.org.apache.kafka =调试 logging.level.org.springframework.kafka =信息
其他设置
spring.kafka.listener.concurrency=5
spring.kafka.listener.type=single
spring.kafka.listener.ack-mode=record
spring.kafka.listener.poll-timeout=10000
spring.kafka.consumer.heartbeat-interval=5000
spring.kafka.consumer.max-poll-records=50
spring.kafka.consumer.fetch-max-wait=10000
spring.kafka.consumer.enable-auto-commit=false
spring.kafka.consumer.properties.security.protocol=SSL
spring.kafka.consumer.retry.maxAttempts=3
spring.kafka.consumer.retry.backoffperiod.millisecs=2000
ContainerFactory设置
@Bean
public ConcurrentKafkaListenerContainerFactory<String, String> recordsKafkaListenerContainerFactory(RetryTemplate retryTemplate) {
ConcurrentKafkaListenerContainerFactory<String, String> factory = new ConcurrentKafkaListenerContainerFactory<>();
factory.setConsumerFactory(consumerFactory);
factory.setConcurrency(listenerCount);
factory.getContainerProperties().setAckMode(AbstractMessageListenerContainer.AckMode.RECORD);
factory.getContainerProperties().setPollTimeout(pollTimeoutMillis);
factory.getContainerProperties().setErrorHandler(new SeekToCurrentErrorHandler());
factory.getContainerProperties().setAckOnError(false);
factory.setRetryTemplate(retryTemplate);
factory.setStatefulRetry(true);
factory.getContainerProperties().setIdleEventInterval(60000L);
return factory;
}
监听器配置
@Component
public class RecordsEventListener implements ConsumerSeekAware {
private static final org.slf4j.Logger LOG = org.slf4j.LoggerFactory.getLogger(RecordsEventListener.class);
@Value("${mode.replay:false}")
public void setModeReplay(boolean enabled) {
this.isReplay = enabled;
}
@KafkaListener(topics = "${event.topic}", containerFactory = "RecordsKafkaListenerContainerFactory")
public void handleEvent(@Payload String payload) throws RecordsEventListenerException {
try {
//business logic
} catch (Exception e) {
LOG.error("Process error for event: {}",payload,e);
if(isRetryableException(e)) {
LOG.warn("Retryable exception detected. Going to retry.");
throw new RecordsEventListenerException(e);
}else{
LOG.warn("Dropping event because non retryable exception");
}
}
}
private Boolean isRetryableException(Exception e) {
return binaryExceptionClassifier.classify(e);
}
@Override
public void registerSeekCallback(ConsumerSeekCallback callback) {
//do nothing
}
@Override
public void onPartitionsAssigned(Map<TopicPartition, Long> assignments, ConsumerSeekCallback callback) {
//do this only once per start of app
if (isReplay && !partitonSeekToBeginningDone) {
assignments.forEach((t, p) -> callback.seekToBeginning(t.topic(), t.partition()));
partitonSeekToBeginningDone = true;
}
}
@Override
public void onIdleContainer(Map<TopicPartition, Long> assignments, ConsumerSeekCallback callback) {
//do nothing
LOG.info("Container is IDLE; no messages to pull.");
assignments.forEach((t,p)->LOG.info("Topic:{}, Partition:{}, Offset:{}",t.topic(),t.partition(),p));
}
boolean isPartitionSeekToBeginningDone() {
return partitonSeekToBeginningDone;
}
void setPartitonSeekToBeginningDone(boolean partitonSeekToBeginningDone) {
this.partitonSeekToBeginningDone = partitonSeekToBeginningDone;
}
}
当不再使用应用程序时，在日志末尾，我总是看到消费者发送LEAVE_GROUP信号的语句。
2019-05-02 18:31:05.770 DEBUG 9548 --- [kafka-coordinator-heartbeat-thread | app] o.a.k.c.c.internals.AbstractCoordinator : [Consumer clientId=consumer-1, groupId=app] Sending Heartbeat request to coordinator x.x.x.com:9093 (id: 2147482638 rack: null)
2019-05-02 18:31:05.770 DEBUG 9548 --- [kafka-coordinator-heartbeat-thread | app] org.apache.kafka.clients.NetworkClient : [Consumer clientId=consumer-1, groupId=app] Using older server API v0 to send HEARTBEAT {group_id=app,generation_id=6,member_id=consumer-1-98d28e69-b0b9-4c2b-82cd-731e53b74b87} with correlation id 5347 to node 2147482638
2019-05-02 18:31:05.872 DEBUG 9548 --- [kafka-coordinator-heartbeat-thread | app] o.a.k.c.c.internals.AbstractCoordinator : [Consumer clientId=consumer-1, groupId=app] Received successful Heartbeat response
2019-05-02 18:31:10.856 DEBUG 9548 --- [kafka-coordinator-heartbeat-thread | app] o.a.k.c.c.internals.AbstractCoordinator : [Consumer clientId=consumer-1, groupId=app] Sending Heartbeat request to coordinator x.x.x.com:9093 (id: 2147482638 rack: null)
2019-05-02 18:31:10.857 DEBUG 9548 --- [kafka-coordinator-heartbeat-thread | app] org.apache.kafka.clients.NetworkClient : [Consumer clientId=consumer-1, groupId=app] Using older server API v0 to send HEARTBEAT {group_id=app,generation_id=6,member_id=consumer-1-98d28e69-b0b9-4c2b-82cd-731e53b74b87} with correlation id 5348 to node 2147482638
2019-05-02 18:31:10.958 DEBUG 9548 --- [kafka-coordinator-heartbeat-thread | app] o.a.k.c.c.internals.AbstractCoordinator : [Consumer clientId=consumer-1, groupId=app] Received successful Heartbeat response
2019-05-02 18:31:11.767 DEBUG 9548 --- [kafka-coordinator-heartbeat-thread | app] o.a.k.c.c.internals.AbstractCoordinator : [Consumer clientId=consumer-1, groupId=app] Sending LeaveGroup request to coordinator x.x.x.com:9093 (id: 2147482638 rack: null)
2019-05-02 18:31:11.767 DEBUG 9548 --- [kafka-coordinator-heartbeat-thread | app] org.apache.kafka.clients.NetworkClient : [Consumer clientId=consumer-1, groupId=app] Using older server API v0 to send LEAVE_GROUP {group_id=app,member_id=consumer-1-98d28e69-b0b9-4c2b-82cd-731e53b74b87} with correlation id 5349 to node 2147482638
2019-05-02 18:31:11.768 DEBUG 9548 --- [kafka-coordinator-heartbeat-thread | app] o.a.k.c.c.internals.AbstractCoordinator : [Consumer clientId=consumer-1, groupId=app] Disabling heartbeat thread
答案 0 :(得分：0)
感谢所有答复。事实证明，确实是经纪人在会话超时中放弃了消费者。该经纪人的旧版本（0.10.0.1）无法容纳KIP-62中概述的新功能，而我们使用的spring-kafka版本可以利用这些新功能。 由于我们无法决定是否升级到代理或更改会话超时，因此我们只是修改了处理逻辑，以在会话超时下完成任务。