release 2.7.1 with nacos failed

[zhengqigo]

• I have searched the issues of this repository and believe that this is not a duplicate.
• I have checked the FAQ of this repository and believe that this is not a duplicate.

Environment

• Dubbo version: 2.7.1
• Operating System version: Windows 10
• Java version: 1.8

If there is an exception, please attach the exception trace:

java.lang.IllegalStateException: No such extension org.apache.dubbo.registry.RegistryFactory by name nacos
	at org.apache.dubbo.common.extension.ExtensionLoader.findException(ExtensionLoader.java:516)
	at org.apache.dubbo.common.extension.ExtensionLoader.createExtension(ExtensionLoader.java:523)
	at org.apache.dubbo.common.extension.ExtensionLoader.getExtension(ExtensionLoader.java:347)
	at org.apache.dubbo.registry.RegistryFactory$Adaptive.getRegistry(RegistryFactory$Adaptive.java)
	at org.apache.dubbo.registry.integration.RegistryProtocol.getRegistry(RegistryProtocol.java:273)
	at org.apache.dubbo.registry.integration.RegistryProtocol.export(RegistryProtocol.java:187)
	at org.apache.dubbo.qos.protocol.QosProtocolWrapper.export(QosProtocolWrapper.java:61)
	at org.apache.dubbo.rpc.protocol.ProtocolListenerWrapper.export(ProtocolListenerWrapper.java:55)
	at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper.export(ProtocolFilterWrapper.java:106)
	at org.apache.dubbo.rpc.Protocol$Adaptive.export(Protocol$Adaptive.java)
	at org.apache.dubbo.config.ServiceConfig.doExportUrlsFor1Protocol(ServiceConfig.java:559)
	at org.apache.dubbo.config.ServiceConfig.doExportUrls(ServiceConfig.java:417)
	at org.apache.dubbo.config.ServiceConfig.doExport(ServiceConfig.java:375)
	at org.apache.dubbo.config.ServiceConfig.export(ServiceConfig.java:337)
	at org.apache.dubbo.config.spring.ServiceBean.export(ServiceBean.java:319)
	at org.apache.dubbo.config.spring.ServiceBean.onApplicationEvent(ServiceBean.java:113)
	at org.apache.dubbo.config.spring.ServiceBean.onApplicationEvent(ServiceBean.java:59)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139)
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:402)
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:359)
	at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:896)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:552)
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775)
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:316)

[zhengqigo]

@chickenlj @beiwei30

[mercyblitz]

Could you please give more information?

[zhengqigo]

dubbo:
application:
name: xxx
protocol:
name: dubbo
port: 20881
serialization: hessian2
registry:
protocol: nacos
address: 127.0.0.1:8848
file: /tmp/cache/${spring.application.name}.cache

[zhengqigo]

@mercyblitz

[zhengqigo]

#3797