执行mvn clean install时出现ExceptionInInitializerError错误求助

我在执行mvn clean install命令时遇到如下错误：

java.lang.ExceptionInInitializerError
        at abcConverterTest.setup(abcConverterTest.java:33)
Caused by: org.apache.kafka.common.KafkaException: Failed to construct kafka producer
        at abcConverterTest.setup(abcConverterTest.java:33)
Caused by: org.apache.kafka.common.config.ConfigException: Invalid url in bootstrap.servers:     ${env:GRAYLOG_BOOTSTRAP_SERVER} at abcConverterTest.setup(abcConverterTest.java:33)

相关代码 #

测试类代码 #

class abcConverterTest {

    private abcConverter abcConverter;
    @Mock private ObjectMapper objectMapper;
    private static final String value = "xyz";
    List<Object> detailsList = new ArrayList<>();
    Map<String, Object> details = new HashMap<>();
    Map<String, Object> details2 = new HashMap<>();
    Map<String, Object> details3 = new HashMap<>();

    @BeforeEach
    public void setup() {
        MockitoAnnotations.initMocks(this);
        this.abcConverter = new abcConverter(objectMapper); // this is line 33

        details.put("key", "abcd");
        details.put("value", "pqrs");

        details2.put("key", "abcd1");
        details2.put("value", "pqrs1");

        details3.put("key", "abcd2");
        details3.put("value", "pqrs2");

        detailsList.add(details);
        detailsList.add(details2);
        detailsList.add(details3);
    }

    @Test
    void testConvertArguements() {
        String result = abcConverter.convertToColumn(null);
        Assertions.assertNull(result);
    }
}

Converter类代码 #

@Slf4j
@Component
@RequiredArgsConstructor(onConstructor_ = @Autowired)
public class abcConverter implements AttributeConverter<List<Object>, String> {

    private final ObjectMapper objectMapper;
    ......
    ......

}

单独运行测试用例时（在配置中添加GRAYLOG_BOOTSTRAP_SERVER=some_value）正常，但执行mvn clean install时失败，请求帮助解决该问题。

解决方案 #

核心原因 #

mvn clean install执行测试阶段时，没有加载到GRAYLOG_BOOTSTRAP_SERVER环境变量，导致Kafka配置中的${env:GRAYLOG_BOOTSTRAP_SERVER}占位符无法解析，触发配置错误。

方案1：Maven命令直接传入参数 #

执行命令时附带环境变量参数，直接为测试阶段提供配置值：

mvn clean install -DGRAYLOG_BOOTSTRAP_SERVER=some_value

方案2：配置Surefire插件传递环境变量 #

在项目pom.xml中配置Maven Surefire插件，统一为测试阶段注入环境变量：

<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-surefire-plugin</artifactId>
            <version>3.2.5</version>
            <configuration>
                <environmentVariables>
                    <GRAYLOG_BOOTSTRAP_SERVER>some_value</GRAYLOG_BOOTSTRAP_SERVER>
                </environmentVariables>
            </configuration>
        </plugin>
    </plugins>
</build>

方案3：隔离测试中的外部依赖 #

如果abcConverter或其依赖组件包含Kafka生产者初始化逻辑，建议在测试中隔离该依赖，避免真实配置加载：

• 使用@MockBean替换真实的Kafka相关Bean：

@SpringBootTest
class abcConverterTest {
    private abcConverter abcConverter;
    @Mock private ObjectMapper objectMapper;
    @MockBean private KafkaProducer<?, ?> kafkaProducer;

    @BeforeEach
    public void setup() {
        MockitoAnnotations.initMocks(this);
        this.abcConverter = new abcConverter(objectMapper);
        // 其他初始化代码
    }

    // 测试方法
}

• 或者在测试配置文件（src/test/resources/application.properties）中添加Kafka配置默认值：

bootstrap.servers=localhost:9092

内容的提问来源于stack exchange，提问作者Abhi