Kafka TestContainer 尝试连接到错误的地址

Question

我正在学习如何测试 Spring 使用 TestContainers 启动 Kafka 应用程序。测试通过。但是，一开始有很多这样的信息：

2021-04-05 09:00:13.927  WARN 1864 --- [| adminclient-1] org.apache.kafka.clients.NetworkClient   : [AdminClient clientId=adminclient-1] Connection to node -1 (localhost/127.0.0.1:9092) could not be established. Broker may not be available.

之后，生产者连接到有效的 bootstrap 服务器：

    bootstrap.servers = [PLAINTEXT://localhost:55015]

如何避免此类错误？他们增加了测试时间。

代码如下：https://github.com/aleksei17/springboot-kafka/blob/master/src/test/java/com/example/kafka/springbootkafka/TestContainersTest1.java

Answer 1

我遇到了同样的问题，解决了创建和应用程序-test.yml的问题：

spring:
  kafka:
    bootstrap-servers: fake:1234

KafkaServerTestProvider.java:

@ActiveProfiles("test")
@Testcontainers
@Slf4j
public class KafkaServerTestProvider {
  public static final KafkaContainer KAFKA_CONTAINER =
      new KafkaContainer(DockerImageName.parse("confluentinc/cp-kafka:latest"));

  public static class KafkaServerInitializer
      implements ApplicationContextInitializer<ConfigurableApplicationContext> {

    @Override
    public void initialize(final ConfigurableApplicationContext applicationContext) {
      KAFKA_CONTAINER.start();
      TestPropertyValues.of(
              "spring.kafka.bootstrap-servers=" + KAFKA_CONTAINER.getBootstrapServers())
          .applyTo(applicationContext.getEnvironment());

      log.info("Kafka for testing: {}", KAFKA_CONTAINER.getBootstrapServers());
    }
  }
}

和测试：

@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.DEFINED_PORT)
@ActiveProfiles("test")
@ContextConfiguration(
    initializers = {KafkaServerTestProvider.KafkaServerInitializer.class},
    classes = Application.class)
class SampleServiceTestIT {
  @Autowired SampleService sampleService;

  @Test
  void sendMessageTest() {
    sampleService.sendMessage(
        "sampletopic",
        SampleRequest.builder().email("user@email.com").name("name").surname("surname").build());
  }
}

Kafka TestContainer 尝试连接到错误的地址

Kafka TestContainer tries to connect to wrong address

java

spring-boot

apache-kafka

testcontainers