Error Messages:

Warning: ContainerBase.addChild: start: 
org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/HelloS]]
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
    at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
    at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:649)
    at org.apache.catalina.startup.HostConfig.manageApp(HostConfig.java:1760)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:301)
    at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819)
    at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801)
    at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:618)
    at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:565)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:301)
    at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819)
    at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801)
    at com.sun.jmx.remote.security.MBeanServerAccessController.invoke(MBeanServerAccessController.java:468)
    at javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1487)
    at javax.management.remote.rmi.RMIConnectionImpl.access$300(RMIConnectionImpl.java:97)
    at javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(RMIConnectionImpl.java:1328)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.java:1427)
    at javax.management.remote.rmi.RMIConnectionImpl.invoke(RMIConnectionImpl.java:848)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:322)
    at sun.rmi.transport.Transport$1.run(Transport.java:177)
    at sun.rmi.transport.Transport$1.run(Transport.java:174)
    at java.security.AccessController.doPrivileged(Native Method)
    at sun.rmi.transport.Transport.serviceCall(Transport.java:173)
    at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:556)
    at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:811)
    at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:670)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.UnsupportedClassVersionError: org/springframework/web/SpringServletContainerInitializer : Unsupported major.minor version 52.0 (unable to load class org.springframework.web.SpringServletContainerInitializer)
    at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2961)
    at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1210)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1690)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1571)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:270)
    at org.apache.catalina.startup.WebappServiceLoader.loadServices(WebappServiceLoader.java:187)
    at org.apache.catalina.startup.WebappServiceLoader.load(WebappServiceLoader.java:152)
    at org.apache.catalina.startup.ContextConfig.processServletContainerInitializers(ContextConfig.java:1559)
    at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1281)
    at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:889)
    at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:386)
    at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
    at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5380)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    ... 42 more

Reason & Solution:

It’s the version problem
Just contacted idea, downloaded the version of 2020.3, created the web version is 5.0, when creating the project can not be modified to reduce the version, and jdk configuration of 1.7, tomcat with 7, so it reported this error. Later, jdk was changed to 1.8 and tomcat was changed to 9 and started normally.
And then continue to reproduce the problem, left for the record, found that only the impact of jdk, jdk1.8 with tomcat7 can also start the project normally.
The long time to do have a love of the old plot, jdk1.7 has been used to the present, too lazy to replace, so ignore the version of the problem.

Read More:

• [Solved] IDEA springboot Startup Error: java.lang.UnsatisfiedLinkError: no tcnative-1 in java.library.path
• [Solved] java Internal error in the mapping processor java.lang.NullPointerException
• [Solved] java Internal error in the mapping processor java.lang.NullPointerException
• [How to Solve Error]java.util.Date cannot be cast to java.sql.Date
• [Solved] JAVA Project Import jstl Error: java.lang.NoClassDefFoundError: javax/servlet/jsp/tagext/TagLibraryValidator
• [Solved] Java.lang.ClassCastException: [Ljava.lang.Long； cannot be cast to java.util.List
• [Solved] Hibernate Error: java.lang.StackOverflowError at java.lang.Integer.toString(Integer.java:402）
• [Solved] JAVA OpenCV Startup Error: java.lang.UnsatisfiedLinkError
• [Solved] IDEA java compile error: Error:java: Compilation failed: internal java compiler error
• [Solved] Java 9 reflection error: java.lang.reflect.InaccessibleObjectException
• [Solved] Hbase-shell 2.x Error: Unhandled Java exception: java.lang.IncompatibleClassChangeError: Found class jline.Terminal…
• [Solved] java: Internal error in the mapping processor: java.lang.NullPointerException
• [Solved] JAVA fx Error: java.lang.instrument ASSERTION FAILED ***: “!errorOutstanding“ with message transform
• java: java.lang.IllegalAccessError: class lombok.javac.apt.LombokProcessor (in unnamed module @0x590
• [Solved] Tomcat configurate HTTPS error: java.net.SocketException: Permission denied
• JAVA error: java.lang.OutOfMemoryError:GC overhead limit exceeded
• Java Error | Error:java: Compilation failed: internal java compiler error
• [Solved] nacos Startup Error: nested exception is java.lang.RuntimeException: java.lang.RuntimeException: [db-load-error
• Java uses class array to report error Exception in thread “main” java.lang.NullPointerException solution
• How to Solve java server error (java application Run Normally)