CODEWITHSUNDEEP
javajspmavenservletstomcat7
Milad Khajavi
Milad Khajavi

Reputation: 2859

Tomcat Unable to compile class for JSP in Servlet 3.0

I have created Servlet with this archetype: http://maciejwalkowiak.github.io/servlet3-maven-archetype/

mvn archetype:generate \
  -DarchetypeGroupId=pl.maciejwalkowiak \
  -DarchetypeArtifactId=servlet3-webapp-archetype \
  -DarchetypeVersion=1.0.1

then I add index.jsp into src/main/webapp directory

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<h1>hello, world</h1>
</body>
</html>

when I run mvn tomcat7:run and open http://127.0.0.1/mycontext/index.jsp

this error occurs: 

HTTP Status 500 - Unable to compile class for JSP:

type Exception report

message Unable to compile class for JSP:

description The server encountered an internal error that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException: Unable to compile class for JSP: 

An error occurred at line: 1 in the generated java file
The type java.util.Map$Entry cannot be resolved. It is indirectly referenced from required .class files

Stacktrace:
    org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:102)
    org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:331)
    org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:469)
    org.apache.jasper.compiler.Compiler.compile(Compiler.java:378)
    org.apache.jasper.compiler.Compiler.compile(Compiler.java:353)
    org.apache.jasper.compiler.Compiler.compile(Compiler.java:340)
    org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:646)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:357)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:722)

what is the problem?

Update

I'm using java8 but I have following maven-compiler configuration in my maven:

        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>2.3.2</version>
            <configuration>
                <source>1.7</source>
                <target>1.7</target>
            </configuration>
        </plugin>

Upvotes: 1

Views: 1850

Answers (2)

User2709
User2709

Reputation: 573

You should double check your Tomcat version. Tomcat 7.0.32 contains a jar that is not fully compatible with Java 8, so upgrading your Tomcat version might help. Take a look at this.

Upvotes: 2

Aurasphere
Aurasphere

Reputation: 4011

Which JDK are you using? If it's 8 you will have to update Tomcat to 8 as well. If that's not the case, you should try going to the Project menu and select Clean... from there. Then try also cleaning the Server and the Server Working folder by selecting these options from the right click menu.

Upvotes: 1

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