Webapp suddenly not available
Hi,
I'm a relative Tomcat newbie. I have built an application with ant and
was using it under Tomcat 5.5.9 for several weeks, and then it suddenly
broke. All request to JSP pages now display the 404 error (the requested
resource is not available). I was making only very minor changes to the
Java code. The HTML pages still work.
There are no errors in catalina.out and localhost.log. I've tried to
configure log4j logging by placing the log4j.properties file into
common/classes (and the commons-logging and log4j jars into common/lib,
but the log file I specified there is not even created.
Finally, I was never able to make my application work with the web.xml
file generated by ant. It only worked after I delete the file. The file
is pretty basic, but I attach it in case there is an obvious error there.
I'll be grateful for any suggestions.
Thanks,
Simon
--
Simon (Vsevolod ILyushchenko) [EMAIL PROTECTED]
http://www.simonf.com
Terrorism is a tactic and so to declare war on terrorism
is equivalent to Roosevelt's declaring war on blitzkrieg.
Zbigniew Brzezinski, U.S. national security advisor, 1977-81
?xml version=1.0 encoding=ISO-8859-1?
!DOCTYPE web-app
PUBLIC -//Sun Microsystems, Inc.//DTD Web Application 2.3//EN
http://java.sun.com/dtd/web-app_2_3.dtd;
web-app
!-- General description of your web application --
display-nameMy Web Application/display-name
description
This is version X.X of an application to perform
a wild and wonderful task, based on servlets and
JSP pages. It was written by Dave Developer
([EMAIL PROTECTED]), who should be contacted for
more information.
/description
!-- Context initialization parameters that define shared
String constants used within your application, which
can be customized by the system administrator who is
installing your application. The values actually
assigned to these parameters can be retrieved in a
servlet or JSP page by calling:
String value =
getServletContext().getInitParameter(name);
where name matches the param-name element of
one of these initialization parameters.
You can define any number of context initialization
parameters, including zero.
--
context-param
param-namewebmaster/param-name
param-value[EMAIL PROTECTED]/param-value
description
The EMAIL address of the administrator to whom questions
and comments about this application should be addressed.
/description
/context-param
!-- Servlet definitions for the servlets that make up
your web application, including initialization
parameters. With Tomcat, you can also send requests
to servlets not listed here with a request like this:
http://localhost:8080/{context-path}/servlet/{classname}
but this usage is not guaranteed to be portable. It also
makes relative references to images and other resources
required by your servlet more complicated, so defining
all of your servlets (and defining a mapping to them with
a servlet-mapping element) is recommended.
Servlet initialization parameters can be retrieved in a
servlet or JSP page by calling:
String value =
getServletConfig().getInitParameter(name);
where name matches the param-name element of
one of these initialization parameters.
You can define any number of servlets, including zero.
--
servlet
servlet-namecontroller/servlet-name
description
This servlet plays the controller role in the MVC architecture
used in this application. It is generally mapped to the .do
filename extension with a servlet-mapping element, and all form
submits in the app will be submitted to a request URI like
saveCustomer.do, which will therefore be mapped to this servlet.
The initialization parameter namess for this servlet are the
servlet path that will be received by this servlet (after the
filename extension is removed). The corresponding value is the
name of the action class that will be used to process this request.
/description
servlet-classcom.mycompany.mypackage.ControllerServlet/servlet-class
init-param
param-namelistOrders/param-name
param-valuecom.mycompany.myactions.ListOrdersAction/param-value
/init-param
init-param
param-namesaveCustomer/param-name
param-valuecom.mycompany.myactions.SaveCustomerAction/param-value
/init-param
!-- Load this servlet at server startup time --
load-on-startup5/load-on-startup
/servlet
servlet
servlet-namegraph/servlet-name
description
This servlet produces GIF images that are dynamically
Re: Webapp suddenly not available
Sriram, I've taken them out, as well as the controller entry (which was a sample line that I don't need). No good. Thanks, Simon Sriram N wrote on 08/15/2005 12:39 PM: --- Vsevolod (Simon) Ilyushchenko [EMAIL PROTECTED] wrote: [snip] I'll be grateful for any suggestions. Why all the JSPC entries in this web.xml ? Remove them as the Tomcat defaults should be just OK. The controller entry and the .do mapping seem to be OK. Thanks, Simon -- -- Sriram Start your day with Yahoo! - make it your home page http://www.yahoo.com/r/hs - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- Simon (Vsevolod ILyushchenko) [EMAIL PROTECTED] http://www.simonf.com Terrorism is a tactic and so to declare war on terrorism is equivalent to Roosevelt's declaring war on blitzkrieg. Zbigniew Brzezinski, U.S. national security advisor, 1977-81 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Webapp suddenly not available
Hmm... what _do_ you require in this file, if not the controller entry ? Those JSPs entries. :) Does the sample web application work ? Yes, it does. Try installing Tomcat again, and then running this web app. Maybe you've messed with some config files by mistake. I definitely have not touched any config files for tomcat - it's probably something in my application. Thanks, Simon -- Simon (Vsevolod ILyushchenko) [EMAIL PROTECTED] http://www.simonf.com Terrorism is a tactic and so to declare war on terrorism is equivalent to Roosevelt's declaring war on blitzkrieg. Zbigniew Brzezinski, U.S. national security advisor, 1977-81 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Webapp suddenly not available
Brian Cook wrote on 08/16/2005 10:36 AM: WOW that looks like a lot lot of unneeded complication. I do not know if this is absolutely correct for every situation. But it is my experience that if you are just doing JSP pages you do not need the web.xml at all. It is only needed if you need to call a servlet, define a resource like JNDI, or set a context value. Is the 404 error from Tomcat or Apache? Do you get the 404 error when you try to connect one of the servlets directly? Brian, The error is from Tomcat - if I go to port 8080, I also see it. My issue is that I can't figure out how to turn debug messages on via log4j - I'm sure I'd see something interesting there. Thanks, Simon -- Simon (Vsevolod ILyushchenko) [EMAIL PROTECTED] http://www.simonf.com Terrorism is a tactic and so to declare war on terrorism is equivalent to Roosevelt's declaring war on blitzkrieg. Zbigniew Brzezinski, U.S. national security advisor, 1977-81 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Different JDBC sources?
Hi, As a relative Tomcat newbie, I can't find anything about how to use two different JDBC sources with the same codebase. I'd like to have two different URLs that use the same classes and JSP pages, but reference two different databases (test and production). Is there a standard way of achieving this? Thanks, Simon -- Simon (Vsevolod ILyushchenko) [EMAIL PROTECTED] http://www.simonf.com Terrorism is a tactic and so to declare war on terrorism is equivalent to Roosevelt's declaring war on blitzkrieg. Zbigniew Brzezinski, U.S. national security advisor, 1977-81 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Different JDBC sources?
Allistair Crossley wrote on 09/13/2005 11:49 AM: The standard way is 2 servers running their own Tomcat. Each Tomcat is then configured with the datasource with differing connection strings. Allistair, And then I would publish my code into two places? (Or alternatively I can have two applications under one Tomcat, I guess.) I was hoping to somehow avoid that and reuse one set of files (I do it in my Perl apps by having different front controller scripts for different URLs). Thanks, Simon -- Simon (Vsevolod ILyushchenko) [EMAIL PROTECTED] http://www.simonf.com Terrorism is a tactic and so to declare war on terrorism is equivalent to Roosevelt's declaring war on blitzkrieg. Zbigniew Brzezinski, U.S. national security advisor, 1977-81 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Different JDBC sources?
Hassan Schroeder wrote on 09/13/2005 12:33 PM:
Vsevolod (Simon) Ilyushchenko wrote:
As a relative Tomcat newbie, I can't find anything about how to use
two different JDBC sources with the same codebase. I'd like to have
two different URLs that use the same classes and JSP pages, but
reference two different databases (test and production). Is there a
standard way of achieving this?
Presumably these are two different Contexts; put the appropriate
Resource in each ${context}.xml file...
Hassan,
Thanks! How will different contexts be invoked depending on the URL?
Also, I need to distinguish between the test and production environment
in the code to figure out whether emails should be sent or not. Can I
detect the current context there?
Thanks,
Simon
--
Simon (Vsevolod ILyushchenko) [EMAIL PROTECTED]
http://www.simonf.com
Terrorism is a tactic and so to declare war on terrorism
is equivalent to Roosevelt's declaring war on blitzkrieg.
Zbigniew Brzezinski, U.S. national security advisor, 1977-81
-
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
How to define contexts?
Hassan, Well, maybe I misunderstood the original question :-) No, it's just me unfamiliar with the idea of contexts. So far I've figured out that there is a file context.xml that can define extra parameters for an application, but I'm not sure about: 1) Whether it's possible to direct two contexts at the same codebase. I'm looking at Catalina/localhost/manager.xml and host-manager.xml, and they use different codebases. 2) How to tie a particular context to a particular URL, as you indicate below. Currently I have dev and www DNS aliases both pointing to virtual host in apache, and these hosts ProxyPass everything to two different Tomcat applications (/dev and /pro). Ideally, I'd like to have one Tomcat application, but I'm not sure how to list two contexts for one application. Thanks, Simon My presumption was that the same code exists at, say, http://dev.example.com/ and http://www.example.com which are clearly different Contexts, even if they're on the same machine being run as virtual hosts. So each Context has a Resource addressing the appropriate DB. -- Simon (Vsevolod ILyushchenko) [EMAIL PROTECTED] http://www.simonf.com Terrorism is a tactic and so to declare war on terrorism is equivalent to Roosevelt's declaring war on blitzkrieg. Zbigniew Brzezinski, U.S. national security advisor, 1977-81 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
