java - 发送到主题时抛出 TimeoutException

Question

我已经使用 kafkatemplate bean 制作了发送器类来将有效负载发送到主题在 SenderConfiguration 类中进行一些配置。

发件人类

@Component
public class Sender {
    private static final Logger LOGGER = (Logger)  LoggerFactory.getLogger(Sender.class);

    @Autowired
    private KafkaTemplate<String, String>   kafkaTemplate;

    public void send(String topic, String payload) {
        LOGGER.info("sending payload='{}' to topic='{}'", payload, topic);

        kafkaTemplate.send(topic, "1", payload);
    }
}

, senderConfiguration 类

@Configuration
public class SenderConfig {

    @Value("${kafka.bootstrap-servers}")
    private String bootstrapServers;

    @Bean
    public Map<String, Object> producerConfigs() {
        Map<String, Object> props = new HashMap<>();
        // list of host:port pairs used for establishing the initial connections to the Kakfa cluster
        props.put(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, bootstrapServers);
        props.put(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG, StringSerializer.class);
        props.put(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG, StringSerializer.class);

        return props;
    }

    @Bean
    public ProducerFactory<String, String> producerFactory() {
        return new DefaultKafkaProducerFactory<>(producerConfigs());
    }

    @Bean
    public KafkaTemplate<String, String> kafkaTemplate() {
        return new KafkaTemplate<>(producerFactory());
    }

    @Bean
    public Sender sender() {
        return new Sender();
    }
}

问题在于发送而不是生产

这里是application.yml文件属性

kafka:
   bootstrap-servers: localhost:9092
topic:
   helloworld: helloworld.t

简单的 Controller 包含

@RestController
public class Controller {
    protected final static String HELLOWORLD_TOPIC = "helloworld.t";

    @Autowired
    private Sender sender;

    @RequestMapping("/send")
    public String SendMessage() {

        sender.send(HELLOWORLD_TOPIC, "message");

        return "success";
    }
}

异常(exception)是

2017-12-20 09:58:04.645  INFO 10816 --- [nio-7060-exec-1] o.a.kafka.common.utils.AppInfoParser     : Kafka version : 0.10.1.1
2017-12-20 09:58:04.645  INFO 10816 --- [nio-7060-exec-1] o.a.kafka.common.utils.AppInfoParser     : Kafka commitId : f10ef2720b03b247
2017-12-20 09:59:04.654 ERROR 10816 --- [nio-7060-exec-1] o.s.k.support.LoggingProducerListener    : Exception thrown when sending a      message with key='1' and payload='message' to topic helloworld.t:

org.apache.kafka.common.errors.TimeoutException: Failed to update   metadata after 60000 ms.

Answer 1

使用包含 key 的方法

kafkaTemplate.send(topic, key, payload);

不清楚您要使用什么键值，但它应该在主题的分区计数中均匀分布。例如，分区计数范围内的随机数。