shenluw opened a new issue #8181: URL: https://github.com/apache/dubbo/issues/8181
- [ ] I have searched the [issues](https://github.com/apache/dubbo/issues) of this repository and believe that this is not a duplicate. - [ ] I have checked the [FAQ](https://github.com/apache/dubbo/blob/master/FAQ.md) of this repository and believe that this is not a duplicate. ### Environment * Dubbo version: 2.7.12 * Operating System version: windows * Java version: jdk11 ### Steps to reproduce this issue 注册中心使用nacos 1.1.4 依赖如下 ` <dependency> <groupId>com.alibaba.boot</groupId> <artifactId>nacos-config-spring-boot-starter</artifactId> <version>0.2.8</version> </dependency> <dependency> <groupId>org.apache.dubbo</groupId> <artifactId>dubbo-spring-boot-starter</artifactId> <version>2.7.12</version> </dependency> ` dubbo配置如下 ` dubbo: registry: address: nacos://xxxxx:8848 ` 消费者使用泛化调用目标接口会出现npe 但是不影响调用结果， 代码如下 ` ReferenceConfig<GenericService> reference = new ReferenceConfig<>(); reference.setGeneric(true); reference.setApplication(applicationConfig); reference.setRegistry(registryConfig); reference.setInterface(metaData.getServiceName()); reference.setProtocol("dubbo"); try { Object obj = reference.get(); if (obj != null) { log.info("init alibaba dubbo reference success there meteData is :{}", metaData.toString()); cache.put(metaData.getServiceName(), reference); } } catch (Exception e) { log.error("init alibaba dubbo refernce ex", e); } ` ### Actual Result 泛化调用初始化时总是会出现npe，原因是什么？ 缺少配置吗？ ` java.lang.NullPointerException: null at org.apache.dubbo.configcenter.support.nacos.NacosDynamicConfiguration.toKeysStream(NacosDynamicConfiguration.java:287) ~[dubbo-2.7.12.jar:2.7.12] at org.apache.dubbo.configcenter.support.nacos.NacosDynamicConfiguration.getConfigKeys(NacosDynamicConfiguration.java:262) ~[dubbo-2.7.12.jar:2.7.12] at org.apache.dubbo.common.config.configcenter.wrapper.CompositeDynamicConfiguration.lambda$getConfigKeys$5(CompositeDynamicConfiguration.java:82) ~[dubbo-2.7.12.jar:2.7.12] at org.apache.dubbo.common.config.configcenter.wrapper.CompositeDynamicConfiguration.iterateConfigOperation(CompositeDynamicConfiguration.java:94) ~[dubbo-2.7.12.jar:2.7.12] at org.apache.dubbo.common.config.configcenter.wrapper.CompositeDynamicConfiguration.getConfigKeys(CompositeDynamicConfiguration.java:82) ~[dubbo-2.7.12.jar:2.7.12] at org.apache.dubbo.metadata.DynamicConfigurationServiceNameMapping.lambda$getAndListen$1(DynamicConfigurationServiceNameMapping.java:80) ~[dubbo-2.7.12.jar:2.7.12] at org.apache.dubbo.metadata.DynamicConfigurationServiceNameMapping.execute(DynamicConfigurationServiceNameMapping.java:90) ~[dubbo-2.7.12.jar:2.7.12] at org.apache.dubbo.metadata.DynamicConfigurationServiceNameMapping.getAndListen(DynamicConfigurationServiceNameMapping.java:78) ~[dubbo-2.7.12.jar:2.7.12] at org.apache.dubbo.registry.client.ServiceDiscoveryRegistry.findMappedServices(ServiceDiscoveryRegistry.java:417) ~[dubbo-2.7.12.jar:2.7.12] at org.apache.dubbo.registry.client.ServiceDiscoveryRegistry.getServices(ServiceDiscoveryRegistry.java:382) ~[dubbo-2.7.12.jar:2.7.12] at org.apache.dubbo.registry.client.ServiceDiscoveryRegistry.doSubscribe(ServiceDiscoveryRegistry.java:262) ~[dubbo-2.7.12.jar:2.7.12] at org.apache.dubbo.registry.client.ServiceDiscoveryRegistry.subscribe(ServiceDiscoveryRegistry.java:256) ~[dubbo-2.7.12.jar:2.7.12] at org.apache.dubbo.registry.ListenerRegistryWrapper.subscribe(ListenerRegistryWrapper.java:105) ~[dubbo-2.7.12.jar:2.7.12] at org.apache.dubbo.registry.integration.DynamicDirectory.subscribe(DynamicDirectory.java:154) ~[dubbo-2.7.12.jar:2.7.12] at org.apache.dubbo.registry.integration.RegistryProtocol.doCreateInvoker(RegistryProtocol.java:525) ~[dubbo-2.7.12.jar:2.7.12] at org.apache.dubbo.registry.integration.InterfaceCompatibleRegistryProtocol.getServiceDiscoveryInvoker(InterfaceCompatibleRegistryProtocol.java:77) ~[dubbo-2.7.12.jar:2.7.12] at org.apache.dubbo.registry.client.migration.MigrationInvoker.refreshServiceDiscoveryInvoker(MigrationInvoker.java:295) ~[dubbo-2.7.12.jar:2.7.12] at org.apache.dubbo.registry.client.migration.MigrationInvoker.migrateToServiceDiscoveryInvoker(MigrationInvoker.java:112) ~[dubbo-2.7.12.jar:2.7.12] at org.apache.dubbo.registry.client.migration.MigrationRuleHandler.doMigrate(MigrationRuleHandler.java:58) ~[dubbo-2.7.12.jar:2.7.12] at org.apache.dubbo.registry.client.migration.MigrationRuleListener.onRefer(MigrationRuleListener.java:103) ~[dubbo-2.7.12.jar:2.7.12] at org.apache.dubbo.registry.integration.RegistryProtocol.interceptInvoker(RegistryProtocol.java:498) ~[dubbo-2.7.12.jar:2.7.12] at org.apache.dubbo.registry.integration.RegistryProtocol.doRefer(RegistryProtocol.java:483) ~[dubbo-2.7.12.jar:2.7.12] at org.apache.dubbo.registry.integration.RegistryProtocol.refer(RegistryProtocol.java:477) ~[dubbo-2.7.12.jar:2.7.12] at org.apache.dubbo.rpc.protocol.ProtocolListenerWrapper.refer(ProtocolListenerWrapper.java:72) ~[dubbo-2.7.12.jar:2.7.12] at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper.refer(ProtocolFilterWrapper.java:81) ~[dubbo-2.7.12.jar:2.7.12] at org.apache.dubbo.qos.protocol.QosProtocolWrapper.refer(QosProtocolWrapper.java:73) ~[dubbo-2.7.12.jar:2.7.12] at org.apache.dubbo.rpc.Protocol$Adaptive.refer(Protocol$Adaptive.java) ~[dubbo-2.7.12.jar:2.7.12] at org.apache.dubbo.config.ReferenceConfig.createProxy(ReferenceConfig.java:378) ~[dubbo-2.7.12.jar:2.7.12] at org.apache.dubbo.config.ReferenceConfig.init(ReferenceConfig.java:313) ~[dubbo-2.7.12.jar:2.7.12] at org.apache.dubbo.config.ReferenceConfig.get(ReferenceConfig.java:206) ~[dubbo-2.7.12.jar:2.7.12] ` -- This is an automated message from the Apache Git Service. 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