在Spring Web应用程序的配置文件(如application.properties)中添加以下属性:
spring.kafka.listener.ack-mode=batch
spring.kafka.consumer.auto-offset-reset=earliest
spring.kafka.consumer.enable-auto-commit=false
spring.kafka.consumer.max-poll-records=50
spring.kafka.consumer.properties.max.poll.interval.ms=600000
spring.kafka.consumer.fetch-max-wait=500
spring.kafka.consumer.max-poll-interval-ms=180000
这些属性可以调整Kafka消费者的行为,使得它们更快地重新连接到Kafka集群并保持连接。此外,还可以使用Spring Kafka提供的“事件监听器”来记录有关Kafka连接和重连的详细信息。例如:
@Component
public class KafkaEventListener {
private static final Logger logger = LoggerFactory.getLogger(KafkaEventListener.class);
@EventListener
public void onReadyEvent(ListenerContainerIdleEvent event) {
if (event.getListenerId().startsWith("myGroup")) {
logger.info("Kafka listener container is now ready for messages: {}", event);
}
}
@EventListener
public void onConsumerFailure(ConsumerStoppedEvent event) {
if (event.getListenerId().startsWith("myGroup")) {
logger.error("Kafka consumer stopped due to error: {}", event);
}
}
@EventListener
public void onConsumerRevived(ConsumerStartedEvent event) {
if (event.getListenerId().startsWith("myGroup")) {
logger.warn("Kafka consumer started again after being stopped: {}", event);
}
}
}
这些事件处理程序将在Kafka连接和重连期间打印详细信息,有助于诊断Kafka客户端重新连接导致Spring应用程序启动失败的问题。