Blank magento admin after uninstall extension from magento connect

Question

I have a serious problem, after uninstall extension from magento connect i see blank magento admin, nothing is visible to find out.

I also removed files under downloader/.cache directory of magento root but nothing get fixed. Any solution will be appreciated.

Answer 1

again, this is pretty easy to debug. example: Apache server: login to your server and: find Apache error log location: first get the configuration file:

~/#: httpd -S
VirtualHost configuration:
*:80                   is a NameVirtualHost
port 80 namevhost example.com (/etc/httpd/conf/httpd.conf)
Syntax OK

look for ErrorLog path:

~/#: grep ErrorLog /etc/httpd/conf/httpd.conf
ErrorLog "/etc/httpd/logs/error_log"

use tail to read the latest log entries:

~/#: tail -f /etc/httpd/logs/error_log

Nginx server:

~/#: cd /var/log/nginx
~/#: tail -f error.log

Magento internal logs: if you are not sure where is the shop installed:

~/#: updatedb
~/#: locate app/etc/local.xml
~/#: /var/www/html/shop.com/app/etc/local.xml

if you are the owner or you know where is the shop:

~/#: cd /var/www/html/shop.com/var/log
~/#: ls
~/#: exception.log   system.log
~/#: tail -f system.log

open your browser and go to your admin page (or any page that fails or blank, etc), click it few times, press F5, etc. and see your error log fills-in with error messages.

but obviously you have to flush the cache storage and clear opcode cache as well, dont forget about memcached and redis :)

p.s: This example uses the default options. Your server may use different configurations and paths.