場景

Nacos簡介、下載與配置持久化到Mysql：

https://blog.csdn.net/BADAO_LIUMANG_QIZHI/article/details/109356152

在下載Nacos的zip包之后，雙擊bin下的startup.cmd之后提示:

org.springframework.context.ApplicationContextException: Unable to start web server; nested exception is org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcatat org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:157)at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:540)at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:142)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)at org.springframework.boot.SpringApplication.run(SpringApplication.java:1260)at org.springframework.boot.SpringApplication.run(SpringApplication.java:1248)at com.alibaba.nacos.Nacos.main(Nacos.java:35)at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)at java.lang.reflect.Method.invoke(Method.java:498)at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:49)at org.springframework.boot.loader.Launcher.launch(Launcher.java:109)at org.springframework.boot.loader.Launcher.launch(Launcher.java:58)at org.springframework.boot.loader.PropertiesLauncher.main(PropertiesLauncher.java:466) Caused by: org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcatat org.springframework.boot.web.embedded.tomcat.TomcatWebServer.initialize(TomcatWebServer.java:125)at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.<init>(TomcatWebServer.java:86)at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getTomcatWebServer(TomcatServletWebServerFactory.java:414)at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getWebServer(TomcatServletWebServerFactory.java:174)at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.createWebServer(ServletWebServerApplicationContext.java:181)at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:154)... 16 common frames omitted

報錯圖片如下

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實現

這是因為這里Nacos沒有配置集群模式，而是使用的單機模式，所以編輯startup.cmd,

將MODE修改為standalone

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默認MODE的值是"cluster"

所以在走下面的邏輯時會走集群模式的邏輯

if %MODE% == "standalone" (echo "nacos is starting with standalone"set"NACOS_OPTS=-Dnacos.standalone=true"set "NACOS_JVM_OPTS=-Xms512m -Xmx512m -Xmn256m" )rem if nacos startup mode is cluster if %MODE% == "cluster" (echo "nacos is starting with cluster"if %EMBEDDED_STORAGE% == "embedded" (set"NACOS_OPTS=-DembeddedStorage=true")set "NACOS_JVM_OPTS=-server -Xms2g -Xmx2g -Xmn1g -XX:MetaspaceSize=128m -XX:MaxMetaspaceSize=320m -XX:-OmitStackTraceInFastThrow -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=%BASE_DIR%\logs\java_heapdump.hprof -XX:-UseLargePages" )

編輯之后，雙擊startup.cmd

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