HTTP Status 500 – Internal Server Error


Type Exception Report

Message java.lang.NoClassDefFoundError: Could not initialize class org.apache.jasper.compiler.EncodingDetector

Description The server encountered an unexpected condition that prevented it from fulfilling the request.

Exception

javax.servlet.ServletException: java.lang.NoClassDefFoundError: Could not initialize class org.apache.jasper.compiler.EncodingDetector
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:338)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)

Root Cause

java.lang.NoClassDefFoundError: Could not initialize class org.apache.jasper.compiler.EncodingDetector
	org.apache.jasper.compiler.ParserController.determineSyntaxAndEncoding(ParserController.java:323)
	org.apache.jasper.compiler.ParserController.doParse(ParserController.java:200)
	org.apache.jasper.compiler.ParserController.parseDirectives(ParserController.java:127)
	org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:202)
	org.apache.jasper.compiler.Compiler.compile(Compiler.java:385)
	org.apache.jasper.compiler.Compiler.compile(Compiler.java:362)
	org.apache.jasper.compiler.Compiler.compile(Compiler.java:346)
	org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:603)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:399)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:385)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:329)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
	org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)

Note The full stack trace of the root cause is available in the server logs.


Apache Tomcat/9.0.16 (Ubuntu)