Hi Jens,

Thank you for the kind advice.

I found that the problem was because of the bug with mod_python in apache2 (https://github.com/grisha/mod_python/issues/46). The bug was fixed with the latest check-in (Dec 1, 2015) in the github project (https://github.com/grisha/mod_python). The check-in version is not updated in the RPM package group yet.