具体报错信息如下：

11-May-2023 10:47:30.355 严重 [http-nio-8081-exec-3] org.apache.catalina.core.StandardHostValve.custom Exception Processing ErrorPage[exceptionType=java.lang.Throwable, location=/comm-static/500.jsp]
 javax.servlet.ServletException: java.lang.NoClassDefFoundError: Could not initialize class org.apache.jasper.el.ELContextImpl
	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:338)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:230)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:726)
	at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:471)
	at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:394)
	at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:311)
	at org.apache.catalina.core.StandardHostValve.custom(StandardHostValve.java:395)
	at org.apache.catalina.core.StandardHostValve.throwable(StandardHostValve.java:332)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:175)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
	at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:624)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:349)
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:783)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:798)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1434)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Thread.java:750)
Caused by: java.lang.NoClassDefFoundError: Could not initialize class org.apache.jasper.el.ELContextImpl
	at org.apache.jasper.compiler.Validator$ValidateVisitor.getJspAttribute(Validator.java:1414)
	at org.apache.jasper.compiler.Validator$ValidateVisitor.checkXmlAttributes(Validator.java:1231)
	at org.apache.jasper.compiler.Validator$ValidateVisitor.visit(Validator.java:879)
	at org.apache.jasper.compiler.Node$CustomTag.accept(Node.java:1545)
	at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2392)
	at org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2444)
	at org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2450)
	at org.apache.jasper.compiler.Node$Root.accept(Node.java:471)
	at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2392)
	at org.apache.jasper.compiler.Validator.validateExDirectives(Validator.java:1853)
	at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:219)
	at org.apache.jasper.compiler.Compiler.compile(Compiler.java:372)
	at org.apache.jasper.compiler.Compiler.compile(Compiler.java:349)
	at org.apache.jasper.compiler.Compiler.compile(Compiler.java:333)
	at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:600)
	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:368)
	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:385)
	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:329)
	... 23 more

刚看到这个报错真的是不知所措，上面说是一个jsp页面jstl标签报错，有一个类无法初始化，当我点击到jsp时jstl标签确实报红。但是我发现也没有缺少依赖。tomcat是自带servlet-api依赖的。最后我查了一下百度，根据其他人提供的资料结合我的项目排查的结果，发现是版本冲突，起冲突的依赖是activiti 。

<dependency>
    <groupId>org.activiti</groupId>
    <artifactId>activiti-common-rest</artifactId>
    <version>RELEASE</version>
</dependency>

我使用的tomcat 8.5.11，jdk 1.8，只需要将activiti版本改为5.x就可以了。

<dependency>
   <groupId>org.activiti</groupId>
   <artifactId>activiti-common-rest</artifactId>
   <version>5.22.0</version>
</dependency>