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New app on Tomcat 5.0.19

Posted on 2004-03-23
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Last Modified: 2013-11-24
I am converting a project containg JSP and servlets from Tomcat 3.3 to 5.0.19
I have moved my web application under the webapps directory and the initial web page is found and comes up ok but when the first servlet comes up I get an error from Tomcat
HTTP Status 404 /insidezos20/servlet/checkuser
Description: The rquested resource (/insidezos20/servlet/checkuser) is not available


Any configuration in the web.xml or server.xml

Any help please ???

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Question by:pouli
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16 Comments
 
LVL 86

Expert Comment

by:CEHJ
ID: 10661087
Make sure you've moved ALL your files
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Author Comment

by:pouli
ID: 10661456
yes,

I have moved them. What else could be ?
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LVL 35

Expert Comment

by:girionis
ID: 10661535
I guess you have also moved the web.xml file. Can you make sure that the checkuser servlet (I guess it;s a servlet) is defined in your web.xml file? Also in Tomcat 5.0.19 you do not need the servlet.xml file.
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Author Comment

by:pouli
ID: 10661632
   <servlet-mapping>
        <servlet-name>checkuser</servlet-name>
        <url-pattern>/servlet/*</url-pattern>
    </servlet-mapping>


It is in the web.xml file
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Expert Comment

by:girionis
ID: 10661827
Do you also have

<servlet>
    <servlet-name>...</servlet-name>
    <servlet-class>...</servlet-class>
</servlet>

tags?
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Author Comment

by:pouli
ID: 10661953
It seems that no.

Why it was working with the old version though?
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Expert Comment

by:girionis
ID: 10662097
Not sure, different settings probably. It's a very long time since I last used Tomcat 3.3, I do not remember details but I *think* you didn't have to specify the <servlet-name> and <servlet-class> in your web.xml. It could find the servlets as long as they were in the WEB-INF/classes folder.
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Expert Comment

by:CEHJ
ID: 10662122
Isn't it that it can find the web apps if they're in the webapps dir and through the app archive  find the servlets?
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Author Comment

by:pouli
ID: 10662154
CEHJ sorry could you explain better what you mean??
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Expert Comment

by:CEHJ
ID: 10662191
That's really a semi-rhetorical(?) question to girionis. Generally there seems to be less config to worry about
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Expert Comment

by:girionis
ID: 10662244
> Isn't it that it can find the web apps if they're in the webapps dir and through the app archive  find the servlets?

It's weird what's going on. AFAIR Tomcat 3.3 needed to servlet.xml file in order to find the web application but could implicitly find a servlet under the web app. On the other hand Tomcat 5.0 (I think this feature was availble after the 4.0 version) does not need a servlet.xml file (can find all the web-apps automatically as long as they are under the web-apps folder) to load the web-app but it does need to explicitly define a servlet in the web.xml file.
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Expert Comment

by:CEHJ
ID: 10662370
Well i think it's a general move in the direction of individual config as opposed to global, which i think is probably a good thing, although it feels a bit rich when you hear them recommending that library jars should really go in each web app. i.e. if you have x.jar used by 4 web apps, you'll have 4 copies of x.jar
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Accepted Solution

by:
rrz earned 200 total points
ID: 10664121
Did you change the header  in your context's web.xml   ?  

In Tomcat 3, I think the Invoker servlet was active.
But in Tomcat 5  the Invoker servlet is commented out.  
To uncomment it, go to  jakarta-tomcat-5.0.19\conf\web.xml  
Uncomment both  <servlet>  and  <servlet-mapping>  for the invoker.
rrz
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Expert Comment

by:Mayank S
ID: 10664497
>> /insidezos20/servlet/checkuser

>> But in Tomcat 5  the Invoker servlet is commented out.  

Correct, the invoker Servlet is no longer there. It was already known a long time back that it will be removed. It must have a mapping in web.xml. The invoker Servlet feature was generally used for testing purposes (while development - as a short-hand way for immediate-testing), but now, its no longer there.
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Author Comment

by:pouli
ID: 10669552
rrz@871311

Thank your answer was correct.

Thank everyone though for your interest.

Talk u later
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Expert Comment

by:rrz
ID: 10671400
pouli, thanks for the points, but I must agree with mayankeagle  

>The invoker Servlet feature was generally used for testing purposes    

and because it was a security risk, was  phased out.    rrz
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