nacos2.2.1启动报错：org.springframework.context.ApplicationContextException: Unable to start web server；等

@Corgi

已于 2024-04-17 22:58:56 修改

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分类专栏： Exception 文章标签： nacos spring cloud 微服务 java

于 2024-04-17 20:05:49 首次发布

本文链接：https://blog.youkuaiyun.com/weixin_46990523/article/details/137886729

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本文档详细记录了在Windows环境下启动Nacos 2.2.1时遇到的错误及解决方法。报错主要涉及启动模式、secret key长度和数据库配置。解决方案包括将Nacos从集群模式切换为单机模式，调整application.properties中的secret key长度，以及正确配置MySQL数据库和执行sql脚本。

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nacos2.2.1启动报错：org.springframework.context.ApplicationContextException: Unable to start web server;等

windows下启动 nacos 界面的报错日志如下：
解决方法一
解决方法二

windows下启动 nacos 界面的报错日志如下：

在这里插入图片描述

找到 nacos.log 日志文件去查看详细的启动日志，在最后几行发现这样的报错日志：

Caused by: com.alibaba.nacos.api.exception.NacosException: java.net.UnknownHostException: jmenv.tbsite.net
	at com.alibaba.nacos.core.cluster.lookup.AddressServerMemberLookup.run(AddressServerMemberLookup.java:152)
	at com.alibaba.nacos.core.cluster.lookup.AddressServerMemberLookup.doStart(AddressServerMemberLookup.java:100)
	at com.alibaba.nacos.core.cluster.AbstractMemberLookup.start(AbstractMemberLookup.java:55)
	at com.alibaba.nacos.core.cluster.ServerMemberManager.initAndStartLookup(ServerMemberManager.java:224)
	at com.alibaba.nacos.core.cluster.ServerMemberManager.init(ServerMemberManager.java:171)
	at com.alibaba.nacos.core.cluster.ServerMemberManager.<init>(ServerMemberManager.java:152)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
	at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:211)
	... 115 common frames omitted
Caused by: java.net.UnknownHostException: jmenv.tbsite.net
	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:196)
	at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:162)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:394)
	at java.net.Socket.connect(Socket.java:606)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:499)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:594)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:278)
	at sun.net.www.http.HttpClient.New(HttpClient.java:375)
	at sun.net.www.http.HttpClient.New(HttpClient.java:393)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1240)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1167)
	at sun.net.www.protocol.http.HttpURLConnection.pl