Re: NoClassDefFoundError - Weblogic 6.1

[Sandeep Takhar]

you can get a patch for this.

Sandeep
--- Max Cooper <[EMAIL PROTECTED]> wrote:
> I noticed something very strange in WL 6.1 SP2 -- it
> will not load jars that
> have more than one dot in the name. I had to change
> our
> jakarta-regexp-1.2.jar to jakarta-regexp-1_2.jar
> (got rid of the . in 1.2)
> to get it to load correctly. If your struts jar is
> called struts-1.1.jar or
> something like that, it might not load correctly.
> 
> -Max
> 
> - Original Message -
> From: "Chuck Cavaness" <[EMAIL PROTECTED]>
> 
> > I had this problem recently with our WL
> installation. I can't remember the
> > exact cause. Obviously it's all about class
> loaders. The difference
> between
> > the parent class loader and the one that is used
> to load the web app. One
> > thing to check, see if you have the WEB-INF
> classes directory in the
> system
> > classpath. If it is, try taking it out and see
> what happens. You're right
> > of course, the struts.jar should be in the lib
> directory of the web app.
> >
> > Chuck
> >
> > At 09:55 PM 4/8/2002 +0530, you wrote:
> > >Hi all,
> > >
> > >The error is:
> > >
> > >java.lang.NoClassDefFoundError:
> org/apache/struts/action/ActionForm
> > >The environment is:
> > >Weblogic 6.1 SP1
> > >WIN NT 2000
> > >Struts.jar is in the lib directory of our
> application.
> > >The JSP includes other JSPs which are included
> using the directive. I
> have
> > >traced the error to an included JSP which is
> using the  tag.
> > >This error is being thrown by this tag library as
> it is not finding the
> > >above class.
> > >The error goes away by keeping struts.jar in the
> classpath of Weblogic
> > >startup. Of course this is not the solution.
> > >Any clues?
> > >Rgs,
> > >Vikram
> 
> 
> 
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RE: NoClassDefFoundError - Weblogic 6.1

[Arnaud Heritier]

I had the same problem and reported it to the BEA support.
There's a patch that I applied and which corrects this problem.
Don't hesitate to contact the BEA support even if you are evaluating the product with 
a trial download.
The support is quite competent and they have numerous patchs to offer :-)

Arno#

> -Message d'origine-
> De:   Max Cooper [SMTP:[EMAIL PROTECTED]]
> Date: mardi 9 avril 2002 02:35
> A:Struts Users Mailing List
> Objet:        Re: NoClassDefFoundError - Weblogic 6.1
> 
> I noticed something very strange in WL 6.1 SP2 -- it will not load jars that
> have more than one dot in the name. I had to change our
> jakarta-regexp-1.2.jar to jakarta-regexp-1_2.jar (got rid of the . in 1.2)
> to get it to load correctly. If your struts jar is called struts-1.1.jar or
> something like that, it might not load correctly.
> 
> -Max
> 
> - Original Message -
> From: "Chuck Cavaness" <[EMAIL PROTECTED]>
> 
> > I had this problem recently with our WL installation. I can't remember the
> > exact cause. Obviously it's all about class loaders. The difference
> between
> > the parent class loader and the one that is used to load the web app. One
> > thing to check, see if you have the WEB-INF classes directory in the
> system
> > classpath. If it is, try taking it out and see what happens. You're right
> > of course, the struts.jar should be in the lib directory of the web app.
> >
> > Chuck
> >
> > At 09:55 PM 4/8/2002 +0530, you wrote:
> > >Hi all,
> > >
> > >The error is:
> > >
> > >java.lang.NoClassDefFoundError: org/apache/struts/action/ActionForm
> > >The environment is:
> > >Weblogic 6.1 SP1
> > >WIN NT 2000
> > >Struts.jar is in the lib directory of our application.
> > >The JSP includes other JSPs which are included using the directive. I
> have
> > >traced the error to an included JSP which is using the  tag.
> > >This error is being thrown by this tag library as it is not finding the
> > >above class.
> > >The error goes away by keeping struts.jar in the classpath of Weblogic
> > >startup. Of course this is not the solution.
> > >Any clues?
> > >Rgs,
> > >Vikram
> 
> 
> 
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RE: NoClassDefFoundError - Weblogic 6.1

[Vikram Goyal01]

Hi Max/Chuck,

The struts.jar is called struts.jar only as defined in the lib directory of our web 
app. Besides, the error was not at the compile time. It was during the run time.

My colleague has found a solution to the problem. We are still validating it.
The solution goes something like this..

Our implementation of ActionForms were kept in a file called classes.jar and was 
placed in the same lib directory (Web-Inf). Now this classes.jar also contained files 
required by our EJBs. So, When the EJBs were deployed, this jar file had already been 
loaded into the classpath (note that this file already contained our implementations 
of ActionForms, so consequently these files were already in the classpath).
When the jsp page which referenced these ActionForms was requested, it seems Weblogic 
tries to load the struts.jar again. But since ActionForms have already been loaded cos 
of our EJBs, this load of struts.jar confuses Weblogic, as it has two ActionForms in 
the classpath and hence give the NoClassDefFound Error.

The solution is to not load the same classes twice. This is done by taking out the 
classes that are required by the JSPs in a separate classes-web.jar and keeping these 
classes only in the Web-inf directory lib.

Comments/questions welcome..

Rgs
Vikram


-Original Message-
From: Max Cooper [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, April 09, 2002 6:05 AM
To: Struts Users Mailing List
Subject: Re: NoClassDefFoundError - Weblogic 6.1


I noticed something very strange in WL 6.1 SP2 -- it will not load jars that
have more than one dot in the name. I had to change our
jakarta-regexp-1.2.jar to jakarta-regexp-1_2.jar (got rid of the . in 1.2)
to get it to load correctly. If your struts jar is called struts-1.1.jar or
something like that, it might not load correctly.

-Max

- Original Message -
From: "Chuck Cavaness" <[EMAIL PROTECTED]>

> I had this problem recently with our WL installation. I can't remember the
> exact cause. Obviously it's all about class loaders. The difference
between
> the parent class loader and the one that is used to load the web app. One
> thing to check, see if you have the WEB-INF classes directory in the
system
> classpath. If it is, try taking it out and see what happens. You're right
> of course, the struts.jar should be in the lib directory of the web app.
>
> Chuck
>
> At 09:55 PM 4/8/2002 +0530, you wrote:
> >Hi all,
> >
> >The error is:
> >
> >java.lang.NoClassDefFoundError: org/apache/struts/action/ActionForm
> >The environment is:
> >Weblogic 6.1 SP1
> >WIN NT 2000
> >Struts.jar is in the lib directory of our application.
> >The JSP includes other JSPs which are included using the directive. I
have
> >traced the error to an included JSP which is using the  tag.
> >This error is being thrown by this tag library as it is not finding the
> >above class.
> >The error goes away by keeping struts.jar in the classpath of Weblogic
> >startup. Of course this is not the solution.
> >Any clues?
> >Rgs,
> >Vikram



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Re: NoClassDefFoundError - Weblogic 6.1

[Max Cooper]

I noticed something very strange in WL 6.1 SP2 -- it will not load jars that
have more than one dot in the name. I had to change our
jakarta-regexp-1.2.jar to jakarta-regexp-1_2.jar (got rid of the . in 1.2)
to get it to load correctly. If your struts jar is called struts-1.1.jar or
something like that, it might not load correctly.

-Max

- Original Message -
From: "Chuck Cavaness" <[EMAIL PROTECTED]>

> I had this problem recently with our WL installation. I can't remember the
> exact cause. Obviously it's all about class loaders. The difference
between
> the parent class loader and the one that is used to load the web app. One
> thing to check, see if you have the WEB-INF classes directory in the
system
> classpath. If it is, try taking it out and see what happens. You're right
> of course, the struts.jar should be in the lib directory of the web app.
>
> Chuck
>
> At 09:55 PM 4/8/2002 +0530, you wrote:
> >Hi all,
> >
> >The error is:
> >
> >java.lang.NoClassDefFoundError: org/apache/struts/action/ActionForm
> >The environment is:
> >Weblogic 6.1 SP1
> >WIN NT 2000
> >Struts.jar is in the lib directory of our application.
> >The JSP includes other JSPs which are included using the directive. I
have
> >traced the error to an included JSP which is using the  tag.
> >This error is being thrown by this tag library as it is not finding the
> >above class.
> >The error goes away by keeping struts.jar in the classpath of Weblogic
> >startup. Of course this is not the solution.
> >Any clues?
> >Rgs,
> >Vikram



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Re: NoClassDefFoundError - Weblogic 6.1

[Chuck Cavaness]

I had this problem recently with our WL installation. I can't remember the 
exact cause. Obviously it's all about class loaders. The difference between 
the parent class loader and the one that is used to load the web app. One 
thing to check, see if you have the WEB-INF classes directory in the system 
classpath. If it is, try taking it out and see what happens. You're right 
of course, the struts.jar should be in the lib directory of the web app.

Chuck

At 09:55 PM 4/8/2002 +0530, you wrote:
>Hi all,
>
>The error is:
>
>java.lang.NoClassDefFoundError: org/apache/struts/action/ActionForm
>The environment is:
>Weblogic 6.1 SP1
>WIN NT 2000
>Struts.jar is in the lib directory of our application.
>The JSP includes other JSPs which are included using the directive. I have 
>traced the error to an included JSP which is using the  tag. 
>This error is being thrown by this tag library as it is not finding the 
>above class.
>The error goes away by keeping struts.jar in the classpath of Weblogic 
>startup. Of course this is not the solution.
>Any clues?
>Rgs,
>Vikram
>
>
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>For additional commands, e-mail: 


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NoClassDefFoundError - Weblogic 6.1

[Vikram Goyal01]

Hi all,

The error is:

java.lang.NoClassDefFoundError: org/apache/struts/action/ActionForm
The environment is:
Weblogic 6.1 SP1
WIN NT 2000
Struts.jar is in the lib directory of our application.
The JSP includes other JSPs which are included using the directive. I have traced the 
error to an included JSP which is using the  tag. This error is being 
thrown by this tag library as it is not finding the above class.
The error goes away by keeping struts.jar in the classpath of Weblogic startup. Of 
course this is not the solution.
Any clues?
Rgs,
Vikram


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