title: getting HTTP Status 500 while running tomcat
body: <pre><code>    HTTP Status 500 -
  
  type Exception report
  
  message
  
  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)
  note The full stack trace of the root cause is available in the Apache Tomcat/7.0.27 logs.
  
  Apache Tomcat/7.0.27
  </code></pre>