Solved

Tomcat embedded in Eclipse for EE Developers

Posted on 2009-05-06
2
607 Views
Last Modified: 2013-12-15
I just installed Eclipse IDE for EE developers. Of course it had support for Apache Tomcat server but the Tomcat itself had to be installed to make that "support in Eclipse" point to the installation folder of Aapache Tomcat. Piece of cake.

I made a servlet that   just displayed a line in the web browser available in Eclipse IDE for EE. I then tried to run that same servlet by opening up a browser in IE7 using http://localhost/p1/tyagi  where p1 is the name of my application and tyagi is the word that my servlet s1 maps to in web.xml.

It ran fine. Remember there is only 1 instance of Tomcat running from inside  Eclipse. All fine.

I then stopped the embedded server running in Eclipse IDE and started the Tomcat manually from installation directory. It started well but refused to display the servlet quoting a 500 error.

Why? Is it because without the support of Eclipse IDE, the barebones Tomcat is unable to function from command prompt as would a full fledged stand alone Tomcat server?

I tried something else but the results were not hard to understand. I started Tomcat both from command prompt and Eclipse and when I tried to run it, Eclipse would tell me the ports including 80 are occupied which is fine. My question is the paragraph before the current.


Also, please take a look at snapshots:

1).working_fine1.jpg: embedded tomcat running and I ran servlet inside browser in Eclipse

2).working_fine2.jpg:  embedded tomcat running and I ran the servlet in IE 7 outside Eclipse

3).problem_tomcat_eclipse.JPG: started tomcat from command prompt and then tried to start it from Eclipse IDE

4).servlet mapping_mapping.jpg:  servlet mapping in web.xml

For those who think I wrote too much here is the gist: why does embedded tomcat allow me to run my application from IE7 and that too only if started from inside Eclipse? Why shutting down Eclipse, starting Tomcat at command prompt would not allow me to run the same application in IE7 giving me a 500:Internal Server Error ?


Thanks in advance.
There is no real code in my servlet and not pertinent.

Open in new window

working--fine1.JPG
working-fine2.JPG
problem-tomcat-eclipse.JPG
errormsg-multiple-tomcat-instanc.jpg
servlet-mapping.JPG
0
Comment
Question by:perfect_tranquility
2 Comments
 

Author Comment

by:perfect_tranquility
Comment Utility
my apologies,

when I switch off Eclipse Tomcat server but start the same Tomcat manually from command line, I dont get a 500 error. I get a 404 error. Attached is the snapshot: error_404.jpg

Thanks
error-404.JPG
0
 
LVL 92

Accepted Solution

by:
objects earned 500 total points
Comment Utility
have you deployed your webapp to (standalone) tomcat ?

0

Featured Post

How to run any project with ease

Manage projects of all sizes how you want. Great for personal to-do lists, project milestones, team priorities and launch plans.
- Combine task lists, docs, spreadsheets, and chat in one
- View and edit from mobile/offline
- Cut down on emails

Join & Write a Comment

Suggested Solutions

Update (December 2011): Since this article was published, the things have changed for good for Android native developers. The Sequoyah Project (http://www.eclipse.org/sequoyah/) automates most of the tasks discussed in this article. You can even fin…
Author Note: Since this E-E article was originally written, years ago, formal testing has come into common use in the world of PHP.  PHPUnit (http://en.wikipedia.org/wiki/PHPUnit) and similar technologies have enjoyed wide adoption, making it possib…
The viewer will learn how to use and create keystrokes in Netbeans IDE 8.0 for Windows.
The viewer will get a basic understanding of what section 508 compliance can entail, learn about skip navigation links, alt text, transcripts, and font size controls.

771 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

13 Experts available now in Live!

Get 1:1 Help Now