外置tomcat部署war包报错ClassNotFoundException: TomcatEmbeddedWebappClassLoader

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一、该问题的重现步骤是什么？

1. 外置tomcat部署war包

2. 报错了，tomcat找不到

二、你期待的结果是什么？实际看到的又是什么？

27-Jun-2023 10:31:43.873 严重 [main] org.apache.catalina.core.ContainerBase.startInternal 子容器启动失败

java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: 启动加载程序时出错

at java.util.concurrent.FutureTask.report(FutureTask.java:122)

at java.util.concurrent.FutureTask.get(FutureTask.java:192)

at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:878)

at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:795)

at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)

at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1332)

at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1322)

at java.util.concurrent.FutureTask.run(FutureTask.java:266)

at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75)

at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:134)

at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:871)

at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:249)

at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)

at org.apache.catalina.core.StandardService.startInternal(StandardService.java:428)

at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)

at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:917)

at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)

at org.apache.catalina.startup.Tomcat.start(Tomcat.java:486)

at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.initialize(TomcatWebServer.java:123)

at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.<init>(TomcatWebServer.java:104)

at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getTomcatWebServer(TomcatServletWebServerFactory.java:479)

at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getWebServer(TomcatServletWebServerFactory.java:211)

at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.createWebServer(ServletWebServerApplicationContext.java:184)

at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:162)

at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:577)

at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:147)

at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:734)

at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:408)

at org.springframework.boot.SpringApplication.run(SpringApplication.java:308)

at org.springframework.boot.web.servlet.support.SpringBootServletInitializer.run(SpringBootServletInitializer.java:175)

at org.springframework.boot.web.servlet.support.SpringBootServletInitializer.createRootApplicationContext(SpringBootServletInitializer.java:155)

at org.springframework.boot.web.servlet.support.SpringBootServletInitializer.onStartup(SpringBootServletInitializer.java:97)

at org.springframework.web.SpringServletContainerInitializer.onStartup(SpringServletContainerInitializer.java:174)

at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:4929)