Changing tomcat version

[Deepa Paranjpe <de...@yahoo.com>]

Hi all,

I was using tomcat's version of 4.1 for a long time and it was working fine. But then I decided to move to version 6. I kept getting these errors --> 

javax.servlet.ServletException: Cannot allocate servlet instance for path /mystuff/servlet/RelatedQuestions
 org.apache.catalina.servlets.InvokerServlet.serveRequest(InvokerServlet.java:389)
 org.apache.catalina.servlets.InvokerServlet.doGet(InvokerServlet.java:134)
 javax.servlet.http.HttpServlet.service(HttpServlet.java:690)

 javax.servlet.http.HttpServlet.service(HttpServlet.java:803)


root cause 
 java.lang.NoClassDefFoundError: javax/servlet/http/HttpServlet 


When I tried to move back to version 4 -- even the main page
i.e. localhost:8080/ doesn't show anything.

How can I fix this problem? Please help.

Thanks much in advance,
Deepa



 
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Re: Changing tomcat version

[Jacob Rhoden <ja...@uptecs.com>]

Hi,

I am by no means an expert, however generally I too have had problems 
running the latest versions of tomcat using Java < 1.6.0.

I am not sure of the reason but using Java 1.6.0_02 makes most problems 
go away. (I am guessing the tomcat 6 distro is compiled with java 1.6?)

Try this to get a working tomcat 1.6.0 (unix only)
 - Make an empty directory (i do "adduser appserver")
 - Download and install java 1.6.0 into it
 - Download and isntall tomcat 6 into it
 - Edit catalina.sh to force it to use java 1.6.0.
 - Copy your web apps over.

This usually takes me all of 5 minutes on a linux box, and gets me a 
stable working version of tomcat every time. (Which we have running 
production).  When it comes time to upgrade I just repeat above steps 
with newer versions in a new directory. The beauty if this is that if 
there is a problem you can always go back.

And not only this but I find that ubuntu and some other distros make 
some strange changes that cause me problems. (ie, like Ubuntu's 
predilections to not use Suns Java. I agree with the philosophy, but in 
reality causes much grief).

Best Regards,
Jacob

Deepa Paranjpe wrote:
> Hi all,
>
> I was using tomcat's version of 4.1 for a long time and it was working fine. But then I decided to move to version 6. I kept getting these errors --> 
>
> javax.servlet.ServletException: Cannot allocate servlet instance for path /mystuff/servlet/RelatedQuestions
>  


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