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Http Status 500 Error In Tomcat Java.lang.nullpointerexception

Thank you! Noted. Can someone here help me out any? I will now picture you as the Robot for evermore. http://orgias.org/http-status/http-status-404-error-in-java.html

Not the answer you're looking for? Of course, it applies to all variables. anywhere... The Eclipse made the init() method like this and that would cause me problems public void init(ServletConfig config) throws ServletException { // TODO Auto-generated method stub super.init(); } so I change it to public void init() throws ServletException { // TODO Auto-generated method stub super.init(); } and that solved my problem.

Is there a field on the form called "type" and are you putting anything in it before clicking register? Thanks for the advice. stevan pivnicki Greenhorn Posts: 23 posted 1 year ago 1 So this was the problem: Since I'm new to the servlet technologies and Eclipse (i was using Netbeans until recently), while creating a servlet, I was clicking on the init check box so Eclipse would make init() method automatically. Avoiding the limit notation during long algebraic manipulations How would a creature produce and store Nitroglycerin?

How to avoid JVM error when opening selenium using Java? asked 2 years ago viewed 10471 times active 1 year ago Blog Stack Overflow Podcast #91 - Can You Stump Nick Craver? What is the method by which we find the list of users logged on a server using telnet service? Declare your list inside the method.

Joe Harry Ranch Hand Posts: 10127 3 I like... A A B B B C C D ........want output columns(2 cols) as......... Next, this portion of the stack trace is the important one: root cause java.lang.NullPointerException org.apache.jsp.DisplayAll_jsp._jspService(DisplayAll_jsp.java:223) It tells you that you are making a null reference somewhere in the JSP. http://stackoverflow.com/questions/21909941/servlet-call-from-tomcat-throwing-http-status-500-java-lang-nullpointerexcepti posted 1 year ago This means not only move its initialization inside the method, but its declaration as well. [Asking smart questions] [About Bear] [Books by Bear] stevan pivnicki Greenhorn Posts: 23 posted 1 year ago Is that necessary only for ArrayLists or for all class declarations inside the servlet ?

and access GeekInterview anytime... Even though that Products variable is only used in the init() method, which is guaranteed to be called only once and hence can't be a thread-safety issue, it tempts future programmers to use it in other methods. BTW - I didn't write this and know that one shouldn't use 'sa' nevertheless - this is what the SQL logs are reporting a failure in. What's odd is that this wasn't occurring before until I migrated it from Hyper-V to VMware vSphere.

I turned it into 2 minutes. https://community.spiceworks.com/topic/1415278-tomcat-http-status-500-java-lang-nullpointerexception-with-sql-jdbc-errors Bear said Never, ever, ever, use instance variables in a servlets. Bear Bibeault Author and ninkuma Marshal Posts: 65271 95 I like... Paul Clapham Sheriff Posts: 21443 33 I like...

Visit Chat Related 0HTTP Status 500 - null1HTTP Status 500 - Servlet execution threw an exception In tomcat7-2HTTP Status 500 - java.lang.NullPointerException Servlet + jsp0Calling servlet from tomcat throws HTTP Status 500 java.lang.NullPointerException0HTTP Status 500 .. check my blog Why don't we have helicopter airlines? PrintWriter pw = response.getWriter(); pw.print(isGet); return; } /** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub } } java servlets tomcat7 web.xml webservice-client share|improve this question edited Feb 20 '14 at 19:53 asked Feb 20 '14 at 13:56 BollyBoy 2115 The error is in the code of the servlet, not the mapping in web.xml –developerwjk Feb 20 '14 at 19:08 can you have a look at it please!?...its really urgent... Never, ever, ever, use instance variables in a servlets.

because one thing i strongly realize that i am unable to give pentaho its ideal envirement that may be causes that problem. A 1 A 2 B 1 B 2 B 3 C...Asked by: sai3689Solve this programming task in language of preference TASK 1: Programming Task in language of preference Imagine a customized computer keyboard with following layout : ERTYU1 DFGHJ2 CVBNM4 The...Asked by: babu Interview & Career Tips Get invaluable Interview and Career Tips delivered directly to your inbox. DANGER!! http://orgias.org/http-status/http-status-404-error-in-java-servlet.html Get your news alert set up today, Once you confirm your Email subscription, you will be able to download Job Inteview Questions Ebook .

How will we make sure that updates happen before Inserts in SCD Type2 dimension...Asked by: PoonamKGiving occurancescan anyone pls solve in datastage......... Privacy| Legal Notices| Contact Us| Site Map Yet the Apache logs indicate that it cannot connect and throws the above NPE.

Please help or place my post in another forum that someone will see - please?!?!

Convert column data into row data Display with commas Cumulative sum calculation Display the rank in asending & descending order for salary column Error, defect, failure Solve this using C++ code Implementing SCD type2 Giving occurances Solve this programming task in language of preference Related Open Questions Mutating trigger timing Solve mix combinations Display previous row salary in the current row display next row salary in the current row Uploading data through bdc call transaction and session method Encryption with aes/cbc/pkcs5 How to solve the function getbyidasync has invalid parameters in office app? Are there any other messages in the log from startup etc? (clutching at straws) - you don't have any of the servlet libraries in your WEB-INF/lib folder do you? fulfilling this request. Using instance variables makes the servlet non-thread-safe and multiple requests to your servlet will all stomp all over each other. [Asking smart questions] [About Bear] [Books by Bear] stevan pivnicki Greenhorn Posts: 23 posted 1 year ago Bear Bibeault wrote:ACK!!!

Your first step should be to learn how to write web apps properly without using Java code in a JSP and to use only the JSTL and EL in the JSPs. FYI - the license webapp ran fine for weeks (many users generated licenses too under JRE8) so I can't figure out why this is happening. Was this answer useful?Yes 1 Reply Mikin R Patel Jul 20th, 2011 you r absolutely right bro......Murali it may sometimes happen that time "When you connect text file to retrieve data from it..sometimes connection could not established or may not open" and can not initialize CONTEXT PARAMETER from file in Servlet programing Was this answer useful?Yes Reply Give your answer: If you think the above answer is not correct, Please select a reason and add your answer below. - Reason - Answer is wrong Spelling Mistakes Duplicate Answer Inappropriate Answer Other Answer Question Click here to Login / Register your free account Name: Email: Answer: Insert Code: Code Language: JCL COBOL ABAP ASP C C for Macs ColdFusion C++ C# CSS Delphi HTML Java Java 5 Javascript MySQL Objective C Oracle Pascal Perl PHP PL/SQL Python Rails Ruby SAS SQL T-SQL VisualBasic VB.NET XML Code: Send Reset Related Answered Questions Power electronics - determine resistor, capacitor and inductor using a battery, a switch and a lamp. have a peek at these guys Where else one can vary diameter of it, yes or no!Asked by: Jigesh ParikhValidate source to target etl mapping using single SQL queryI got the following mapping table and asked me to validate source to target the ETL mapping using Single SQL query.

What would happen really? Reply With Quote 12-03-2007,09:56 AM #2 mlowery View Profile View Forum Posts Private Message Guest Join Date Oct 2006 Posts 817 Have you modified the pentaho-solutions directory and subdirectories in any way? Some components may not be visible. What's New?

What's New? with isGet=null ..... –BollyBoy Feb 20 '14 at 20:18 Try String isGet = "" + wsp.getAttributeValue(EntityID, AttrName); –developerwjk Feb 20 '14 at 20:20 doesnt works :( actually the program is not coming to this point...it gives out this line : System.out.println(EntityID+AttrName); and then throws exception –BollyBoy Feb 20 '14 at 20:25 | show 5 more comments up vote 0 down vote accepted I resolved it.... So one thread might set a variable to one value, another will set it to another value, then the first thread gets the wrong value, and well, all hell breaks loose. [Asking smart questions] [About Bear] [Books by Bear] Post Reply Bookmark Topic Watch Topic New Topic Similar Threads getServletConfig() does not work I am getting error when i submit form from home.jsp exception Add my own class to JSP - ResultSet cannot be resolved to a type Eclipse+ Tomcat -org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) All times are in JavaRanch time: GMT-6 in summer, GMT-7 in winter Contact Us | advertise | mobile view | Powered by JForum | Copyright © 1998-2016 Paul Wheaton FAQs Search RecentTopics FlaggedTopics HotTopics Best Topics Register / Login Win a copy of Penetration Testing Basics this week in the Security forum! How do I resolve this ?

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