I am trying to start up an webpage to use as a demo. I am using tomcat
11. I have been looking at the error but have made no progress figuring
out the problem. Below I am including the stack trace I am getting from
tomcat and would appreciated any guidance on finding the source of my
problem and how to fix it.
The problem occurs when I am in firefox and I enter the url of
application, e.g. I enter the following URL:
localhost:8080/theApp
The attach file "appErr.txt" contains the resulting stack trace.
Thanks for any advise!
Jim A.
HTTP Status 500 – Internal Server Error
Type Exception Report
Message java.lang.NoClassDefFoundError:
javax/servlet/jsp/tagext/TagLibraryValidator
Description The server encountered an unexpected condition that prevented it
from fulfilling the request.
Exception
jakarta.servlet.ServletException: java.lang.NoClassDefFoundError:
javax/servlet/jsp/tagext/TagLibraryValidator
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:307)
jakarta.servlet.http.HttpServlet.service(HttpServlet.java:716)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:483)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93)
org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:663)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:382)
org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63)
org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:905)
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1746)
org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52)
org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1148)
org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636)
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:63)
java.base/java.lang.Thread.run(Thread.java:833)
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