org.apache.catalina.LifecycleException: 无法启动组件 [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/eq-cloudwebapp]]

Question

我被这个错误困住了，其中一个组件无法启动，并且不知道如何解决这个问题。 任何帮助都感激不尽。

环境：

• Gradle 5.4.1
• jdk 11.0.15 (11.0.15+8-LTS-149)
• tomcat 9.0.64
• 我正在使用 SmartTomcat 插件来运行项目。

我试过的：

• 将 log4j.jar 添加到依赖项
• 清除浏览器缓存
• 双重检查环境变量

笔记：

servlet-api.jar 从 tomcat 添加到项目库

这是卡塔利娜日志：

    java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/eq-cloudwebapp.main]]
        at java.base/java.util.concurrent.FutureTask.report(FutureTask.java:122)
        at java.base/java.util.concurrent.FutureTask.get(FutureTask.java:191)
        at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:926)
        at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:835)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
        at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1396)
        at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1386)
        at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
        at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75)
        at java.base/java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:140)
        at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:919)
        at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:263)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
        at org.apache.catalina.core.StandardService.startInternal(StandardService.java:432)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
        at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:930)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
        at org.apache.catalina.startup.Catalina.start(Catalina.java:772)
http://localhost:8080/eq-cloudwebapp.main
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:566)
        at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:345)
        at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:476)
    Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/eq-cloudwebapp.main]]
        at org.apache.catalina.util.LifecycleBase.handleSubClassException(LifecycleBase.java:440)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:198)
        at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1396)
        at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1386)
        at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
        at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75)
        at java.base/java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:140)
        at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:919)
        ... 21 more
    Caused by: java.lang.NoSuchMethodError: javax.servlet.ServletContext.getClassLoader()Ljava/lang/ClassLoader;
        at org.apache.tomcat.util.scan.StandardJarScanner.doScanClassPath(StandardJarScanner.java:250)
        at org.apache.tomcat.util.scan.StandardJarScanner.scan(StandardJarScanner.java:233)
        at org.apache.catalina.startup.ContextConfig.processJarsForWebFragments(ContextConfig.java:2136)
        at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1289)
        at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:986)
        at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:303)

Answer 1

引起：java.lang.NoSuchMethodError: javax.servlet.ServletContext.getClassLoader()Ljava/lang/ClassLoader;

可能你的servlet版本太低，getClassLoader方法只有servlet 3.0以上才有