I'm turning to this mailing list now after I posted my problem to the Opencms mailing list at opencms.org. And someone from that list gave me a hint that my problem could possibly have something to do with the folling citation:

http://mail-archives.apache.org/mod_mbox//logging-log4j-user/200804.mbox/%3c6d42962c-5db1-4acb-bb3a-d9d0d91e9...@apache.org%3e

This is the text I posted to the opencms list and I'm just repeating it here:


Christoph P. Kukulies schrieb:
> We stop and start Tomcat6.0.10  and Apache2.2 every midnight during the
> backup of our intranet machine.
>
> Since a couple of days the first access in the morning, when the
> secretary wants to log into opencms, produces the error below:
>
>
> HTTP Status 500 -
>
> type Exception report
>
> message
>
> description The server encountered an internal error () that prevented
> it from fulfilling this request.
>
> exception
>
> org.opencms.main.CmsInitException: Critical error during OpenCms
> initialization: Unable to initialize the user driver.
>       org.opencms.main.OpenCmsCore.getInstance(OpenCmsCore.java:290)
>       org.opencms.main.OpenCmsServlet.doGet(OpenCmsServlet.java:127)
>       javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
>       javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
>
> note The full stack trace of the root cause is available in the Apache
> Tomcat/6.0.10 logs.
> Apache Tomcat/6.0.10
>
>
> Looking into Tomcat/logs/stdout_20100226.log I see:
>
>
>
> --------------------
> The following critical error occurred:
> Critical error during OpenCms initialization: Unable to initialize the
> user driv
> er.
> Giving up, unable to start OpenCms.
> --------------------
> log4j:ERROR LogMananger.repositorySelector was null likely due to error
> in class
>  reloading, using NOPLoggerRepository.
>
>
> Starting OpenCms, version 7.5.0 in web application "ROOT"
>
> Copyright (c) 2009 Alkacon Software GmbH
> OpenCms comes with ABSOLUTELY NO WARRANTY
> This is free software, and you are welcome to
> redistribute it under certain conditions.
> Please see the GNU Lesser General Public Licence for
> further details.
>


I would be glad if I could get some help on m problem getting solved here.

Thanks.

--
Christoph



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