Spring boot 当运行spring启动测试时，得到hazelcast.core.DuplicateInstanceNameException

如何使用Hazelcast执行spring boot应用程序的集成测试，因为当运行所有测试时都会得到Hazelcast.core.DuplicateInstanceNameException

我使用Spring Boot2.0.0.RC1和Hazelcast3.9.2

对hazelcast使用java配置：

@Bean
public Config getHazelCastServerConfig() {
    final Config config = new Config();
    config.setInstanceName(hzInstance);
    config.getGroupConfig().setName(hzGroupName).setPassword(hzGroupPassword);

    final ManagementCenterConfig managementCenterConfig = config.getManagementCenterConfig();
    managementCenterConfig.setEnabled(true);
    managementCenterConfig.setUrl(mancenter);

    final MapConfig mapConfig = new MapConfig();
    mapConfig.setName(mapName);
    mapConfig.setEvictionPolicy(EvictionPolicy.NONE);
    mapConfig.setTimeToLiveSeconds(0);
    mapConfig.setMaxIdleSeconds(0);

    config.getScheduledExecutorConfig(scheduler)
            .setPoolSize(16)
            .setCapacity(100)
            .setDurability(1);

    final NetworkConfig networkConfig = config.getNetworkConfig();
    networkConfig.setPort(5701);
    networkConfig.setPortAutoIncrement(true).setPortCount(30);

    final JoinConfig joinConfig = networkConfig.getJoin();
    joinConfig.getMulticastConfig().setEnabled(false);
    joinConfig.getAwsConfig().setEnabled(false);

    final TcpIpConfig tcpIpConfig = joinConfig.getTcpIpConfig();
    tcpIpConfig.addMember(memberOne)
            .addMember(memberTwo);
    tcpIpConfig.setEnabled(true);

    return config;
}

@Bean
public HazelcastInstance getHazelCastServerInstance() {
    final HazelcastInstance hazelcastInstance = Hazelcast.newHazelcastInstance(getHazelCastServerConfig());
    hazelcastInstance.getClientService().addClientListener(new ClientListener() {
        @Override
        public void clientConnected(Client client) {
            System.out.println(String.format("Connected %s %s %s", client.getClientType(), client.getUuid(), client.getSocketAddress()));
            log.info(String.format("Connected %s %s %s", client.getClientType(), client.getUuid(), client.getSocketAddress()));
        }

        @Override
        public void clientDisconnected(Client client) {
            System.out.println(String.format("Disconnected %s %s %s", client.getClientType(), client.getUuid(), client.getSocketAddress()));
            log.info(String.format("Disconnected %s %s %s", client.getClientType(), client.getUuid(), client.getSocketAddress()));
        }
    });

    return hazelcastInstance;
}

我有一个简单的测试：

@RunWith(SpringRunner.class)
@SpringBootTest(classes = UpaSdcApplication.class)
@ActiveProfiles("test")
 public class CheckEndpoints {

@Autowired
private ApplicationContext context;

private static final String HEALTH_ENDPOINT = "/actuator/health";

private static WebTestClient testClient;

@Before
public void init() {
    testClient = org.springframework.test.web.reactive.server.WebTestClient
            .bindToApplicationContext(context)
            .configureClient()
            .filter(basicAuthentication())
            .build();
}

@Test
public void testHealth(){
    testClient.get().uri(HEALTH_ENDPOINT).accept(MediaType.APPLICATION_JSON)
            .exchange()
            .expectStatus()
            .isOk()
            .expectBody()
            .json("{\"status\": \"UP\"}");
}
}

如果在测试类与其他测试分离的情况下运行，则执行良好并通过测试。 如果与其他测试一起运行-获取异常：

Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.hazelcast.core.HazelcastInstance]: Factory method 'getHazelCastServerInstance' threw exception; nested exception is com.hazelcast.core.DuplicateInstanceNameException: HazelcastInstance with name 'counter-instance' already exists!
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185)
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:579)
    ... 91 more
Caused by: com.hazelcast.core.DuplicateInstanceNameException: HazelcastInstance with name 'counter-instance' already exists!
    at com.hazelcast.instance.HazelcastInstanceFactory.newHazelcastInstance(HazelcastInstanceFactory.java:170)
    at com.hazelcast.instance.HazelcastInstanceFactory.newHazelcastInstance(HazelcastInstanceFactory.java:124)
    at com.hazelcast.core.Hazelcast.newHazelcastInstance(Hazelcast.java:58)
    at net.kyivstar.upa.sdc.config.HazelcastConfiguration.getHazelCastServerInstance(HazelcastConfiguration.java:84)
    at net.kyivstar.upa.sdc.config.HazelcastConfiguration$$EnhancerBySpringCGLIB$$c7da65f3.CGLIB$getHazelCastServerInstance$0(<generated>)
    at net.kyivstar.upa.sdc.config.HazelcastConfiguration$$EnhancerBySpringCGLIB$$c7da65f3$$FastClassBySpringCGLIB$$b920d5ef.invoke(<generated>)

原因：org.springframework.beans.beans实例化异常：未能实例化[com.hazelcast.core.HazelcastInstance]：工厂方法“getHazelCastServerInstance”引发异常；嵌套异常为com.hazelcast.core.DuplicateInstanceNameException:名为“计数器实例”的HazelcastInstance已存在！
位于org.springframework.beans.factory.support.SimpleInstallationStrategy.instantiate（SimpleInstallationStrategy.java:185）
位于org.springframework.beans.factory.support.ConstructorResolver.InstanceUsingFactoryMethod（ConstructorResolver.java:579）
... 91多
原因：com.hazelcast.core.DuplicateInstanceNameException:名为“计数器实例”的HazelcastInstance已存在！
位于com.hazelcast.instance.HazelcastInstanceFactory.newHazelcastInstance（HazelcastInstanceFactory.java:170）
位于com.hazelcast.instance.HazelcastInstanceFactory.newHazelcastInstance（HazelcastInstanceFactory.java:124）
位于com.hazelcast.core.hazelcast.newHazelcastInstance（hazelcast.java:58）
位于net.kyivstar.upa.sdc.config.HazelcastConfiguration.getHazelCastServerInstance（HazelcastConfiguration.java:84）
位于net.kyivstar.upa.sdc.config.HazelcastConfiguration$$EnhancerBySpringCGLIB$$c7da65f3.CGLIB$getHazelCastServerInstance$0（）
在net.kyivstar.upa.sdc.config.HazelcastConfiguration$$EnhancerBySpringCGLIB$$c7da65f3$$FastClassBySpringCGLIB$$b920d5ef.invoke（）

---

你如何解决这个问题？如何运行集成测试？

instanceName配置元素用于创建命名的Hazelcast成员，并且对于JVM中的每个Hazelcast实例都应该是唯一的。在您的情况下，要么您应该为同一JVM中的每个

HazelcastInstance

bean创建设置不同的实例名称，要么您可以完全删除

instanceName

配置，如果您不使用实例名称调用实例。

在运行我的测试时遇到了相同的问题。在我的例子中，原因是，spring测试框架试图启动新的上下文，同时缓存旧的上下文-从而尝试创建另一个具有相同名称的hazelcast实例，而其中一个已经在缓存的上下文中

一旦TestContext框架加载ApplicationContext（或 WebApplicationContext）对于测试，该上下文被缓存和重用 对于声明相同唯一上下文的所有后续测试 同一测试套件中的配置

阅读本文以了解有关spring测试框架如何管理测试上下文的更多信息。

---

我目前正在研究解决方案，稍后将发布。我能看到的一个可能的解决方案是在每次测试后使用

@DirtiesContext（classMode=DirtiesContext.classMode.after_CLASS）

删除测试上下文，但这在性能方面非常昂贵。

我遇到了同样的问题，我通过检查实例是否已经存在来解决它：

@Bean
public CacheManager cacheManager() {
    HazelcastInstance existingInstance = Hazelcast.getHazelcastInstanceByName(CACHE_INSTANCE_NAME);
    HazelcastInstance hazelcastInstance = null != existingInstance 
         ? existingInstance                                                                       
         : Hazelcast.newHazelcastInstance(hazelCastConfig());
    return new HazelcastCacheManager(hazelcastInstance);
}

您可以看到代码的其余部分