Advertisement

01.31.2003 at 08:19PM PST, ID: 20492178
[x]
Attachment Details
[x]
The Solution Rating System

With so many solutions, how can you tell which solutions are most likely to help you and which ones are not? To provide you with a tool to use, we rate our solutions based on various elements that most accurately determine if a solution is a quality solution. To explain what factors affect the solution rating, here are the elements we take into consideration when formulating our solution rating.

  • The Grade of the Solution
  • The Zone Rank of the Expert Providing the Solution
  • The Number of Author and Expert Comments
  • The Number of Experts Contributing
  • The Feedback of the Community

Your Input Matters
Because of the way the system is set up, the most important variable in this equation is you. As a member of Experts Exchange, you are able to cast your vote on the quality of the solutions in regard to how complete, accurate, helpful and easy to understand each solution is. When you provide your feedback, each rating is adjusted accordingly. So, if you see a solution that has a poor rating that you think is a good solution, let us know by rating it. As you do, the rating will be adjusted and will become more accurate for other members of our site.

If you have any suggestions that you would like to make for our rating system, please ask a question in the Suggestions Zone of Community Support.

Thank you!
8.0
Tomcat Http Status 500 - error
Zone: Application Servers
Tags: 500, http, status, tomcat, error
Ok.  I am running Tomcat and I have a jsp page calling a servlet.  When I submit the form contained in the jsp page, I get the following error:

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

javax.servlet.ServletException: Wrapper cannot find servlet class Login or a class it depends on
      at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:880)
      at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:658)
      at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
      at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
      at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2396)
      at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
      at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
      at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
      at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
      at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)
      at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:405)
      at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:380)
      at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:508)
      at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:533)
      at java.lang.Thread.run(Thread.java:536)


root cause

java.lang.ClassNotFoundException: Login
      at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1428)
      at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1274)
      at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:874)
      at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:658)
      at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
      at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
      at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2396)
      at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
      at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
      at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
      at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
      at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
      at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
      at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
      at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)
      at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:405)
      at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:380)
      at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:508)
      at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:533)
      at java.lang.Thread.run(Thread.java:536)



Here is the important part of the jsp file:

...

<BR><FORM ACTION="http://myDomain.com/MyApp/servlet/webstudent.Login" METHOD=POST>
<TABLE>
<TR>
        <TD>StudentID:</TD>
        <TD><INPUT TYPE=TEXT NAME=StudentID></TD>
</TR>
<TR>
        <TD>Password:</TD>
        <TD><INPUT TYPE=PASSWORD NAME=Password></TD>
</TR>
<TR>
        <TD ALIGN=RIGHT COLSPAN=2>
        <INPUT TYPE=SUBMIT VALUE=Login></TD>



...


and here is the servlet:

 public void doPost(HttpServletRequest request,HttpServletResponse response) throws ServletException,IOException
        {
                HttpSession session = request.getSession(true);         //Create a session if one doesn't exist
                session.setAttribute("loggedIn", new String("true"));

                String StudentID = request.getParameter("StudentID");
                String Password = request.getParameter("Password");
                String FirstName;
                String LastName;
                String Course;
                String Semester;
                String trans = "0";
                session.setAttribute("trans",trans);
                try
                {
                        Context initCtx = new InitialContext();
                        Context envCtx = (Context)initCtx.lookup("java:comp/env");
                        DataSource ds = (DataSource)envCtx.lookup("jdbc/PrototypeBooks");
                        Connection con = ds.getConnection();
                        Statement s = con.createStatement();
                        String sql = "SELECT * FROM Students WHERE StudentID='" + StudentID + "' AND Password='" + Password + "'";
                        ResultSet rs = s.executeQuery(sql);
                        if (rs.next())
                        {
                                session.setAttribute("loggedIn","true");
                                FirstName = rs.getString("FirstName");
                                LastName = rs.getString("LastName");
                                Course = rs.getString("Course");
                                Semester = rs.getString("Semester");

                                Student myStudent = new Student(StudentID,LastName,FirstName,Course,Semester);
                                session.setAttribute("myStudent",myStudent);
                        }
                        rs.close();
                                s.close();
                        con.close();
                }
                catch(Exception ex)
                {
                        System.out.println(ex.toString());
                }

            
            if((String) session.getAttribute("loggedIn") == "true")
                {
                        System.out.println("The login was executed flawlessly");
                        response.sendRedirect("http://myDomain.com/jsp/choose.jsp");
                }
                else
                {
                        String error = "error";
                        session.setAttribute("error",error);
                        response.sendRedirect("http://myDomain.com/jsp/Login.jsp");
                }

        }



Any help would be appreciated.... WITH POINTS ;)
Start your free trial to view this solution
Question Stats
Zone: Software
Question Asked By: DontLookDown
Solution Provided By: jerkface2098
Participating Experts: 2
Solution Grade: A
Views: 512
Translate:
Loading Advertisement...
01.31.2003 at 09:07PM PST, ID: 7857734
jerkface2098:

All comments and solutions are available to Premium Service Members only.

Start your 7 day free trial and see for yourself why Experts Exchange is the easiest and most proven technology resource in the world. Get Started

Already a member? Login to view this solution.

 
01.31.2003 at 09:08PM PST, ID: 7857736
DontLookDown:

All comments and solutions are available to Premium Service Members only.

Start your 7 day free trial and see for yourself why Experts Exchange is the easiest and most proven technology resource in the world. Get Started

Already a member? Login to view this solution.

 
12.30.2003 at 09:58PM PST, ID: 10020321
opabc:

All comments and solutions are available to Premium Service Members only.

Start your 7 day free trial and see for yourself why Experts Exchange is the easiest and most proven technology resource in the world. Get Started

Already a member? Login to view this solution.

 
 
Loading Advertisement...
Microsoft
  • Internet Protocols
  • Applications
  • Development
  • OS
  • Hardware
  • Windows Security
Apple
  • Operating Systems
  • Hardware
  • Programming
  • Networking
  • Software
Internet
  • Search Engines
  • File Sharing
  • WebTrends / Stats
  • Spy / Ad Blockers
  • Web Browsers
  • New Net Users
  • Web Development
  • Chat / IM
  • Anti Spam
  • Web Servers
  • Anti-Virus
  • Email Clients
Gamers
  • Tips
  • Online / MMORPG
  • Puzzle
  • Emulators
  • Action / Adventure
  • Role Playing
  • Consoles
  • Game Programming
  • Strategy
  • Sports
  • Misc
  • Computer Games
Digital Living
  • Hardware
  • New Net Users
  • New Users
  • Software
  • Digital Music
  • Gaming World
  • Home Security
  • Apple
  • Networking Hardware
Virus & Spyware
  • Vulnerabilities
  • IDS
  • Encryption
  • Anti-Virus
  • Operating Systems Security
  • Software Firewalls
  • WebApplications
  • Cell Phones
  • Operating Systems
  • Internet
  • Hardware Firewalls
Hardware
  • Handhelds / PDAs
  • Displays / Monitors
  • Components
  • Networking Hardware
  • Peripherals
  • Laptops/Notebooks
  • Storage
  • Servers
  • Desktops
  • New Users
  • Misc
  • Apple
Software
  • System Utilities
  • Industry Specific
  • Network Management
  • Photos / Graphics
  • Page Layout
  • VMWare
  • Misc
  • Web Development
  • OS
  • CYGWIN
  • Voice Recognition
  • Message Queue
  • Quality Assurance
  • Security
  • Firewalls
  • MultiMedia Applications
  • Development
  • Database
  • Office / Productivity
  • Business Management
  • OS/2 Apps
  • Server Software
  • Internet / Email
ITPro
  • OS
  • Storage
  • Encryption
  • Operating Systems Security
  • Apple Hardware
  • Laptops & Notebooks
  • Servers
  • Networking Hardware
  • Peripherals
  • Devices
  • Displays / Monitors
  • WebTrends / Stats
  • Search Engines
  • Firewalls
  • WebApplications
  • IDS
  • Vulnerabilities
  • Email Clients
  • File Sharing
  • Spy / Ad Blockers
  • Web Browsers
  • Web Servers
  • Networking
  • Anti-Virus
  • Chat / IM
  • Anti Spam
Developer
  • Web Servers
  • Web Browsers
  • Game Programming
  • Dev Tools
  • Industry Specific
  • Office / Productivity
  • Database
  • CYGWIN
  • Web Development
  • Search Engines
  • File Sharing
  • WebTrends / Stats
  • Programming
  • Content Management
  • Application Servers
  • Protocols
Storage
  • Removable Backup Media
  • Storage Technology
  • Servers
  • Grid
  • Remote Access
  • Backup / Restore
  • Misc
  • Hard Drives
OS
  • Miscellaneous
  • Security
  • Development
  • Linux
  • VMWare
  • MainFrame OS
  • Unix
  • Apple
  • OS / 2
  • AS / 400
  • BeOS
  • Microsoft
  • VMS / OpenVMS
Database
  • Oracle
  • Miscellaneous
  • MySQL
  • Software
  • Sybase
  • Contact Management
  • PostgreSQL
  • Data Manipulation
  • Clarion
  • InterSystems Cache
  • Siebel
  • MUMPS
  • OLAP
  • SQLBase
  • SAS
  • GIS & GPS
  • 4GL
  • Berkeley DB
  • DB2
  • Informix
  • Interbase / Firebird
  • FoxPro
  • Reporting
  • LDAP
  • Filemaker Pro
  • MS SQL Server
  • dBase
  • MS Access
Security
  • Misc
  • Web Browsers
  • Software Firewalls
  • Operating Systems Security
  • File Sharing
  • Spy / Ad Blockers
  • Vulnerabilities
  • WebApplications
  • IDS
  • Anti-Virus
  • Encryption
  • Anti Spam
  • Email Clients
  • VPN
  • Chat / IM
Programming
  • Editors IDEs
  • Installation
  • Handhelds / PDAs
  • Multimedia Programming
  • System / Kernel
  • Algorithms
  • Game
  • Signal Processing
  • Project Management
  • Open Source
  • Database
  • Misc
  • Languages
  • Processor Platforms
  • Theory
Web Development
  • Scripting
  • Blogs
  • Web Servers
  • Software
  • Search Engines
  • Web Graphics
  • Images
  • Internet Marketing
  • Images and Photos
  • Components
  • Document Imaging
  • Web Languages/Standards
  • Illustration
  • WebApplications
  • Fonts
  • WebTrends / Stats
  • Authoring
  • Digital Camera Software
  • Miscellaneous
Networking
  • Protocols
  • Apple Networking
  • Network Management
  • Message Queue
  • Application Servers
  • Content Management
  • File Servers
  • Email Servers
  • Misc
  • Java Editors & IDEs
  • Wireless
  • Networking Hardware
  • Backup / Restore
  • System Utilities
  • ISPs & Hosting
  • Web Servers
  • Storage Technology
  • Removable Backup Media
  • Servers
  • Broadband
  • Grid
  • OS / 2
  • Novell Netware
  • Unix Networking
  • Windows Networking
  • Security
  • Telecommunications
  • Operating Systems
  • Linux Networking
Other
  • Community Advisor
  • Lounge
  • Community Support
  • New Net Users
  • Philosophy / Religion
  • Math / Science
  • Miscellaneous
  • URLs
  • Expert Lounge
  • Politics
  • Puzzles / Riddles
Community Support
  • Suggestions
  • New to EE
  • New Topics
  • Community Advisor
  • CleanUp
  • Announcements
  • General
  • Feedback
  • Input
  • EE Bugs
 
01.31.2003 at 09:07PM PST, ID: 7857734
jerkface2098:
It looks like your links are set up properly.  However, I would check your web.xml file to make sure that you have the proper <servlet-class> entered.
The error you are getting is saying that it can't find the class.  Check web.xml
Accepted Solution
 
01.31.2003 at 09:08PM PST, ID: 7857736
DontLookDown:
An hour and a half of confusion for one partial line of code......Gotta love programming
 
12.30.2003 at 09:58PM PST, ID: 10020321
opabc:
I got this error.
Any feedback on this?
Thanks


type Exception report

message

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

exception

org.apache.jasper.JasperException
      org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:358)
      org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:301)
      org.apache.jasper.servlet.JspServlet.service(JspServlet.java:248)
      javax.servlet.http.HttpServlet.service(HttpServlet.java:856)


root cause

java.lang.NullPointerException
      org.apache.struts.util.RequestUtils.computeURL(RequestUtils.java:521)
      org.apache.struts.util.RequestUtils.computeURL(RequestUtils.java:436)
      org.apache.struts.util.RequestUtils.computeURL(RequestUtils.java:396)
      org.apache.struts.taglib.logic.RedirectTag.doEndTag(RedirectTag.java:294)
      org.apache.jsp.index_jsp._jspx_meth_logic_redirect_0(index_jsp.java:81)
      org.apache.jsp.index_jsp._jspService(index_jsp.java:57)
      org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:133)
      javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
      org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:311)
      org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:301)
      org.apache.jasper.servlet.JspServlet.service(JspServlet.java:248)
      javax.servlet.http.HttpServlet.service(HttpServlet.java:856)




Clement
 
 
20080236-EE-VQP-29