dxm1991 opened a new issue #8222:
URL: https://github.com/apache/dubbo/issues/8222
### Environment
* Dubbo version: 2.7.10
* Operating System version: Linux version 3.0.101-0.47.55-default
* Java version: openjdk version "1.8.0_222"
### Steps to reproduce this issue
1. 将dubbo版本由2.7.8升级为2.7.10版本，启动，报如下错误
Caused by: java.lang.IllegalStateException: No such extension
org.apache.dubbo.registry.client.ServiceDiscovery by name safezookeeper, no
related exception was found, please check whether related SPI module is missing.
at
org.apache.dubbo.common.extension.ExtensionLoader.findException(ExtensionLoader.java:622)
~[dubbo-2.7.10.jar:2.7.10]
at
org.apache.dubbo.common.extension.ExtensionLoader.createExtension(ExtensionLoader.java:629)
~[dubbo-2.7.10.jar:2.7.10]
at
org.apache.dubbo.common.extension.ExtensionLoader.getExtension(ExtensionLoader.java:429)
~[dubbo-2.7.10.jar:2.7.10]
at
org.apache.dubbo.common.extension.ExtensionLoader.getExtension(ExtensionLoader.java:413)
~[dubbo-2.7.10.jar:2.7.10]
at
org.apache.dubbo.registry.client.DefaultServiceDiscoveryFactory.createDiscovery(DefaultServiceDiscoveryFactory.java:47)
~[dubbo-2.7.10.jar:2.7.10]
at
org.apache.dubbo.registry.client.AbstractServiceDiscoveryFactory.lambda$getServiceDiscovery$0(AbstractServiceDiscoveryFactory.java:38)
~[dubbo-2.7.10.jar:2.7.10]
at
java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1660)
~[?:1.8.0_272]
at
org.apache.dubbo.registry.client.AbstractServiceDiscoveryFactory.getServiceDiscovery(AbstractServiceDiscoveryFactory.java:38)
~[dubbo-2.7.10.jar:2.7.10]
at
org.apache.dubbo.registry.client.ServiceDiscoveryRegistry.getServiceDiscovery(ServiceDiscoveryRegistry.java:167)
~[dubbo-2.7.10.jar:2.7.10]
at
org.apache.dubbo.registry.client.ServiceDiscoveryRegistry.createServiceDiscovery(ServiceDiscoveryRegistry.java:144)
~[dubbo-2.7.10.jar:2.7.10]
at
org.apache.dubbo.registry.client.ServiceDiscoveryRegistry.<init>(ServiceDiscoveryRegistry.java:127)
~[dubbo-2.7.10.jar:2.7.10]
at
org.apache.dubbo.registry.client.ServiceDiscoveryRegistryFactory.createRegistry(ServiceDiscoveryRegistryFactory.java:35)
~[dubbo-2.7.10.jar:2.7.10]
at
org.apache.dubbo.registry.support.AbstractRegistryFactory.getRegistry(AbstractRegistryFactory.java:150)
~[dubbo-2.7.10.jar:2.7.10]
at
org.apache.dubbo.registry.RegistryFactoryWrapper.getRegistry(RegistryFactoryWrapper.java:34)
~[dubbo-2.7.10.jar:2.7.10]
at
org.apache.dubbo.registry.RegistryFactory$Adaptive.getRegistry(RegistryFactory$Adaptive.java)
~[dubbo-2.7.10.jar:2.7.10]
at
org.apache.dubbo.registry.integration.InterfaceCompatibleRegistryProtocol.getServiceDiscoveryInvoker(InterfaceCompatibleRegistryProtocol.java:63)
~[dubbo-2.7.10.jar:2.7.10]
at
org.apache.dubbo.registry.client.migration.MigrationInvoker.refreshServiceDiscoveryInvoker(MigrationInvoker.java:291)
~[dubbo-2.7.10.jar:2.7.10]
at
org.apache.dubbo.registry.client.migration.MigrationInvoker.migrateToServiceDiscoveryInvoker(MigrationInvoker.java:112)
~[dubbo-2.7.10.jar:2.7.10]
at
org.apache.dubbo.registry.client.migration.MigrationRuleHandler.doMigrate(MigrationRuleHandler.java:60)
~[dubbo-2.7.10.jar:2.7.10]
at
org.apache.dubbo.registry.client.migration.MigrationRuleListener.onRefer(MigrationRuleListener.java:103)
~[dubbo-2.7.10.jar:2.7.10]
at
org.apache.dubbo.registry.integration.RegistryProtocol.interceptInvoker(RegistryProtocol.java:480)
~[dubbo-2.7.10.jar:2.7.10]
at
org.apache.dubbo.registry.integration.RegistryProtocol.doRefer(RegistryProtocol.java:466)
~[dubbo-2.7.10.jar:2.7.10]
at
org.apache.dubbo.registry.integration.RegistryProtocol.refer(RegistryProtocol.java:460)
~[dubbo-2.7.10.jar:2.7.10]
at
org.apache.dubbo.rpc.protocol.ProtocolListenerWrapper.refer(ProtocolListenerWrapper.java:72)
~[dubbo-2.7.10.jar:2.7.10]
at
org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper.refer(ProtocolFilterWrapper.java:81)
~[dubbo-2.7.10.jar:2.7.10]
at
org.apache.dubbo.qos.protocol.QosProtocolWrapper.refer(QosProtocolWrapper.java:73)
~[dubbo-2.7.10.jar:2.7.10]
at org.apache.dubbo.rpc.Protocol$Adaptive.refer(Protocol$Adaptive.java)
~[dubbo-2.7.10.jar:2.7.10]
at
org.apache.dubbo.config.ReferenceConfig.createProxy(ReferenceConfig.java:373)
~[dubbo-2.7.10.jar:2.7.10]
at
org.apache.dubbo.config.ReferenceConfig.init(ReferenceConfig.java:308)
~[dubbo-2.7.10.jar:2.7.10]
at
org.apache.dubbo.config.ReferenceConfig.get(ReferenceConfig.java:206)
~[dubbo-2.7.10.jar:2.7.10]
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