can't run my servlet on Tomcat 4.1.18

[zhanghong920]

Hi all,

I've installed tomcat 4.1.18 under my account(linux machine). When I use "

http://.../servlet/HelloWorldClass"

to access my example servlet, it has "Http status 404" error, and says "the requested resource is not available". It has the same problem when I try to access it from a html file using:
... action="/servlet/HelloWorldClass".
But the examples given by the system works.

Is there anything I missed? It's wierd because I tried the same way under tomcat 4.0.4 and it worked very well.

Thanks a lot,

Zhanghong920

 

[sedj]

>>> When I use "

http://.../servlet/HelloWorldClass

You need the port number - ie

http://localhost:8080/servlet/HelloWorldClass

 

[zhanghong920]

yes, I used the port number actually:
http:// servername:my_portnumber/servlet/HelloWorldClass
and there is still the same problem.

Thanks,
zhanghong920

 

[mailtorakeshkumar]

Define servlets ,in web.xml file located at WEB-INF folder of your application ,that are included in the your application as shown below.

<servlet>
<servlet-name>SendMailServlet</servlet-name>
<servlet-class>SendMailServlet</servlet-class>
</servlet>

Then call the servlet by the name which you have assigned to it.

 

[mailtorakeshkumar]

refer to my last suggestion.Apart from defining servlet you should also do the following in the same web.xml


<servlet-mapping>
<servlet-name>SendMailServlet</servlet-name>
<url-pattern>/SendMailServlet</url-pattern>
</servlet-mapping>

Invoke the sevlet using url-pattern i.e. /SendMailServlet

 

[sedj]

Also, I'd check that in TOMCAT_HOME/conf/web.xml, the status of the tag line beginning <servlet-name>invoker</servlet-name>

This is the part which maps a URL such as /servlet/MyServlet to WEB-INF/classes/MyServlet

If it is commented out, then the mapping will fail.

 

[zhanghong920]

Thanks all your information. I've added the <servlet-name>, <servlet-class>, as well as <servlet-mapping> into the web.xml as you suggested, and checked that the first line of &quot;invoker&quot; in the conf/web.xml is not commented out. The result is:

if I refer to my servlet as: ..., action=&quot;HelloWorldExample&quot;, or as &quot;

http://server:portnumber/HelloWorldExample&quot;,

my servlet works very well.

but if using : ..., action=&quot;servlet/HelloWorldExample&quot; instead, or as

http://server:portnumber/servlet/HelloWorldExample&quot;,

it doesn't work.

It seems that the &quot;invoker&quot; part in the conf/web.xml doesn't work, if it is used to mapping &quot;/servlet/*&quot; to the directory ..webapps/ROOT/WEB-INF/classes/*. Right now, my servlet works since the web.xml under my application directory (..webapps/ROOT/WEB-INF) surpressed the &quot;invoker&quot; part. -- It seems to me like that.

Any comments?