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From "Jeroen ter Voorde" <j.tervoo...@home.nl>
Subject Re: Servlet initializing twice
Date Tue, 25 Jun 2002 07:03:17 GMT

----- Original Message -----
From: "Vadim Gritsenko" <vadim.gritsenko@verizon.net>
To: <cocoon-dev@xml.apache.org>
Sent: Monday, June 24, 2002 2:48 PM
Subject: RE: Servlet initializing twice


> > From: Jeroen ter Voorde [mailto:j.tervoorde@home.nl]
> >
> > Hi,
> >
> > I read this problem was fixed in the latest tomcat versions. But i
> still got
> > the problem with 4.0.4.
> > It seems it has something to do with the classloader I'm using a
> singleton
> > server class which also gets initialized
> > twice making me think there are two instances of the same class. With
>
> You have some classloading issues, but not the issue in subject of your
> mail. If you would have multiple servlet initializations, Cocoon will
> try to initialize twice, including HSQLDB which binds to the port and
> second instance fails to do so. In tomcat 4.0.4, this does not happen,
> and this issue is solved.
>
>
> > previous excalibur jars moving all jars from WEB-INF/lib to
> > tomcat/common/lib fixed the problem.
> > The latest excalibur jars broke the above solution so my problem is
> back
> > again :(
> >
> > Any ideas?
>
> Make your class Avalon component or make a wrapper around your class.
> Then Cocoon will be able to manage lifecycle of your class.
>
> Vadim
>

I just made a testcomponent which only prints a line to the console.
I added the component to cocoon.xconf. I also removed the parent component
manager from web.xml
The component is initialized twice and the classes itself are also loaded
twice.
I tested this using com.myorg.MyClass.class.hashCode() which prints two
different values.

I'm not really into the classloader stuff but i understand a class will
never be loaded twice by
the same classloader. I didn't configure the classloader with cocoon in
web.xml.



>
> > Thanks,
> >     Jeroen
>
>
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