Getting 404 - Page Not Found after upgrading to 1.9.3.7

Question

I have to upgrade Magento from 1.9.3.3 to 1.9.3.7 and in that case I cloned the live system to an sub-domain of the live Domain. I always fixed the multi conflict with issue and getting upgraded I thought, but I dont know if it realy worked. Because when I hit the refresh Button after upgraden via Magento connect Manager I got an blank page and when I try to went back to the backend I got an 404 Error and also at the frontend. Every Site is gone into the Magento 404 Page.

I spend hours of time to fix it and try the solves of this threads:

• http://www.codesolutions.de/magento-404-error-auf-unterseiten-z-b-nach-serverumzug-loesung/

• 404 page not found issue on all pages after upgrading Magento ver. 1.7.0.2 to 1.9.2

But nothing works for me.

Do anybody knows a fix that I dont try until yet?

Answer 1

Temporary Solution:

Goto 'core_cache_option' table and set all the values to 0

(You are disabling all the Cache Types) block_html, collections, config, config_api, config_api2, eav, layout, translate

and refresh the Home page. It will work.

Solution http://devdocs.magento.com/guides/m1x/ce19-ee114/ce1.9_release-notes.html#ce19-1936

Be sure that there is no php warning in your code (website).

Answer 2

My solution, go to file app/Mage.php on line 808, replace

$file = empty($file) ? 'system.log' : basename($file);

to

$file = empty($file) ? 'system.log' : $file;

and comment the following line

/*
if (!self::helper('log')->isLogFileExtensionValid($file)) {     
                return;     
}*/