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From "Pulkit Singhal" <pulkitsing...@gmail.com>
Subject Re: Filter class not found problem
Date Mon, 02 Apr 2007 16:44:01 GMT
Hello Frank,

It seems to me that the error is not so much about the Filter you want to
load but the fact that it can't find the javax/servlet/Filter class which is
(I think) supposed to be part of the servlet-api.jar ... I know you said
that its bundled but try moving that jar around. Or at least crack open that
jar in winzip or list the files using the jar command to make sure it really
does have the javax.servlet.Filter class.

On 4/1/07, Frank W. Zammetti <fzlists@omnytex.com> wrote:
>
> Hey folks... I'm having a real pain of a problem here... vital stats:
>
> JRE 1.6.0-b105 (JDK 6)
> Tomcat 6.0.10
>
> I have a filter that compiles fine but will not initialize... error that
> appears on Tomcat startup:
>
> Apr 2, 2007 1:04:38 AM org.apache.catalina.core.StandardContextfilterStart
> SEVERE: Exception starting filter MasterControlFilter
> java.lang.NoClassDefFoundError: javax/servlet/Filter
>        at java.lang.ClassLoader.defineClass1(Native Method)
>        at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
>        at java.security.SecureClassLoader.defineClass(
> SecureClassLoader.java:124)
>        at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
> ...and so on...
>
> The filter is contained within a JAR in my webapp's WEB-INF/lib
> directory.  I've verified the filter is in the correct package, and that
> web.xml specifies the correct class name.
>
> I've spent about an hour Googling, and I've found numerous references to
> seemingly similar problems, but no answers... I've verified that there
> is no other servlet-api.jar floating around... I did notice a number of
> places that said servlet-api.jar should be in CATALINA_HOME/common/lib,
> but it's in CATALINA_HOME/lib in my installation (that's how it came out
> of the distro)... I assume that's just some old documentation I'm
> finding, but maybe not?
>
> For completeness, environment variables I have:
>
> CATALINA_HOME=k:\tomcat6010
> JAVA_HOME=c:\java15
> Path=c:\java15\bin;k:\tomcat6010\bin;x:\classes\apache-ant-1.7.0\bin
> ...NO classpath defined...
>
> I don't think there's any other relevant env vars.  Can anyone point me
> in the right direction?  I'm pretty well stuck at the moment until I get
> this resolved.  Thanks!
>
> Frank
>
>
> --
> Frank W. Zammetti
> Founder and Chief Software Architect
> Omnytex Technologies
> http://www.omnytex.com
> AIM/Yahoo: fzammetti
> MSN: fzammetti@hotmail.com
> Author of "Practical Ajax Projects With Java Technology"
> (2006, Apress, ISBN 1-59059-695-1)
> Java Web Parts - http://javawebparts.sourceforge.net
> Supplying the wheel, so you don't have to reinvent it!
>
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