Request exceeded the limit of 10 internal redirects

Question

My website has been slowed down a little last couple of days. I've looked into my error log and found lots of these:

[Mon Sep 30 00:09:53 2013] [error] [client 66.249.66.205] Request exceeded the limit of 10 internal redirects due to probable configuration error. Use 'LimitInternalRecursion' to increase the limit if necessary. Use 'LogLevel debug' to get a backtrace. [Mon Sep 30 00:09:53 2013] [debug] core.c(3120): [client 66.249.66.205] r->uri = /home/mysitecom/domains/mysite.com/public_html/index.php [Mon Sep 30 00:09:53 2013] [debug] core.c(3126): [client 66.249.66.205] redirected from r->uri = /home/mysitecom/domains/mysite.com/public_html/index.php [Mon Sep 30 00:09:53 2013] [debug] core.c(3126): [client 66.249.66.205] redirected from r->uri = /home/mysitecom/domains/mysite.com/public_html/index.php [Mon Sep 30 00:09:53 2013] [debug] core.c(3126): [client 66.249.66.205] redirected from r->uri = /home/mysitecom/domains/mysite.com/public_html/index.php [Mon Sep 30 00:09:53 2013] [debug] core.c(3126): [client 66.249.66.205] redirected from r->uri = /home/mysitecom/domains/mysite.com/public_html/index.php [Mon Sep 30 00:09:53 2013] [debug] core.c(3126): [client 66.249.66.205] redirected from r->uri = /home/mysitecom/domains/mysite.com/public_html/index.php [Mon Sep 30 00:09:53 2013] [debug] core.c(3126): [client 66.249.66.205] redirected from r->uri = /home/mysitecom/domains/mysite.com/public_html/index.php [Mon Sep 30 00:09:53 2013] [debug] core.c(3126): [client 66.249.66.205] redirected from r->uri = /home/mysitecom/domains/mysite.com/public_html/index.php [Mon Sep 30 00:09:53 2013] [debug] core.c(3126): [client 66.249.66.205] redirected from r->uri = /home/mysitecom/domains/mysite.com/public_html/index.php [Mon Sep 30 00:09:53 2013] [debug] core.c(3126): [client 66.249.66.205] redirected from r->uri = /home/mysitecom/domains/mysite.com/public_html/index.php [Mon Sep 30 00:09:53 2013] [debug] core.c(3126): [client 66.249.66.205] redirected from r->uri = /images/2013/02/600x376_0.076827001313237200_pixnaz_ir_1.jpg 

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How can I find what is causing this?

It seems a loop around index.php, with the exception of the last one which is an image, most likely linked within one of my pages (not index).

I'm using codeigniter, which is a mvc framework and everything goes trough the index.php file, so it's a bit harder to understand where it goes wrong.

Apparently it has something to do with .htaccess (it's been mentioned in couple of blogs).

Here is my .htaccess

<IfModule mod_rewrite.c>     RewriteEngine On      #Removes access to the system folder by users.     #Additionally this will allow you to create a System.php controller,     #previously this would not have been possible.     #'system' can be replaced if you have renamed your system folder.     RewriteCond %{REQUEST_URI} ^system.*     RewriteRule ^(.*)$ index.php?/$1 [L]      #When your application folder isn't in the system folder     #This snippet prevents user access to the application folder     #Submitted by: Fabdrol     #Rename 'application' to your applications folder name.     RewriteCond %{REQUEST_URI} ^application.*     RewriteRule ^(.*)$ index.php?/$1 [L]      #Checks to see if the user is attempting to access a valid file,     #such as an image or css document, if this isn't true it sends the     #request to index.php     RewriteCond %{REQUEST_FILENAME} !-f     RewriteCond %{REQUEST_FILENAME} !-d     RewriteRule ^(.*)$ index.php?/$1 [L] </IfModule>  <IfModule !mod_rewrite.c>     # If we don't have mod_rewrite installed, all 404's     # can be sent to index.php, and everything works as normal.     # Submitted by: ElliotHaughin      ErrorDocument 404 index.php </IfModule>  AddType image/x-windows-bmp bmp 

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I did some changes to my .htaccess (basically I've removed to top conditions before the last block) and now I get this:

[Wed Oct 02 00:10:07 2013] [error] [client 66.249.74.60] Request exceeded the limit of 10 internal redirects due to probable configuration error. Use 'LimitInternalRecursion' to increase the limit if necessary. Use 'LogLevel debug' to get a backtrace. [Wed Oct 02 00:10:07 2013] [debug] core.c(3120): [client 66.249.74.60] r->uri = /home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/images/2013/07/irwm_mysite_47b49a36d251fea382ba6b494fd3532ea75c78e6.jpg [Wed Oct 02 00:10:07 2013] [debug] core.c(3126): [client 66.249.74.60] redirected from r->uri = /home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/images/2013/07/irwm_mysite_47b49a36d251fea382ba6b494fd3532ea75c78e6.jpg [Wed Oct 02 00:10:07 2013] [debug] core.c(3126): [client 66.249.74.60] redirected from r->uri = /home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/images/2013/07/irwm_mysite_47b49a36d251fea382ba6b494fd3532ea75c78e6.jpg [Wed Oct 02 00:10:07 2013] [debug] core.c(3126): [client 66.249.74.60] redirected from r->uri = /home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/images/2013/07/irwm_mysite_47b49a36d251fea382ba6b494fd3532ea75c78e6.jpg [Wed Oct 02 00:10:07 2013] [debug] core.c(3126): [client 66.249.74.60] redirected from r->uri = /home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/images/2013/07/irwm_mysite_47b49a36d251fea382ba6b494fd3532ea75c78e6.jpg [Wed Oct 02 00:10:07 2013] [debug] core.c(3126): [client 66.249.74.60] redirected from r->uri = /home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/images/2013/07/irwm_mysite_47b49a36d251fea382ba6b494fd3532ea75c78e6.jpg [Wed Oct 02 00:10:07 2013] [debug] core.c(3126): [client 66.249.74.60] redirected from r->uri = /home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/images/2013/07/irwm_mysite_47b49a36d251fea382ba6b494fd3532ea75c78e6.jpg [Wed Oct 02 00:10:07 2013] [debug] core.c(3126): [client 66.249.74.60] redirected from r->uri = /home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/images/2013/07/irwm_mysite_47b49a36d251fea382ba6b494fd3532ea75c78e6.jpg [Wed Oct 02 00:10:07 2013] [debug] core.c(3126): [client 66.249.74.60] redirected from r->uri = /home/mysite/domains/mysite.com/public_html/index.php/img/home/mysite/domains/mysite.com/public_html/index.php/img/images/2013/07/irwm_mysite_47b49a36d251fea382ba6b494fd3532ea75c78e6.jpg [Wed Oct 02 00:10:07 2013] [debug] core.c(3126): [client 66.249.74.60] redirected from r->uri = /home/mysite/domains/mysite.com/public_html/index.php/img/images/2013/07/irwm_mysite_47b49a36d251fea382ba6b494fd3532ea75c78e6.jpg [Wed Oct 02 00:10:07 2013] [debug] core.c(3126): [client 66.249.74.60] redirected from r->uri = /images/2013/07/irwm_mysite_47b49a36d251fea382ba6b494fd3532ea75c78e6.jpg 

Now it seems there is the img directory in the mix, but I dont have that directory at all. There used to be a subdomain which I used for images with this address.

img.mysite.com => mysite.com/files/images/ 

I don't use it anymore because of some slowness and complications. Now I just use the real path to images.

Why do i get this subdomain in the loop? I don't have access to the guy who configured this server. Could it be some config / setting that he has done?

Answer 1

To prevent infinite looping add an extra RewriteCond line on top of your rule like this:

RewriteCond %{ENV:REDIRECT_STATUS} ^$ RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule ^(.*)$ index.php?/$1 [L] 

RewriteCond %{ENV:REDIRECT_STATUS} ^$ prevents looping by checking an internal mod_rewrite variable REDIRECT_STATUS which is set to 200 after first successful internal redirect.

Reference: Apache mod_rewrite Introduction

Answer 2

Looking to your htaccess I see that you use it to remove index.php from your url, but you are missing the RewriteBase, you can add it after the RewriteEngine On directly like this:

<IfModule mod_rewrite.c>     RewriteEngine On     RewriteBase /      #Removes access to the system folder by users.     #Additionally this will allow you to create a System.php controller,     #previously this would not have been possible.     #'system' can be replaced if you have renamed your system folder.     RewriteCond %{REQUEST_URI} ^system.*     RewriteRule ^(.*)$ /index.php?/$1 [L]      #When your application folder isn't in the system folder     #This snippet prevents user access to the application folder     #Submitted by: Fabdrol     #Rename 'application' to your applications folder name.     RewriteCond %{REQUEST_URI} ^application.*     RewriteRule ^(.*)$ /index.php?/$1 [L]      #Checks to see if the user is attempting to access a valid file,     #such as an image or css document, if this isn't true it sends the     #request to index.php     RewriteCond %{REQUEST_FILENAME} !-f     RewriteCond %{REQUEST_FILENAME} !-d     RewriteRule ^(.*)$ index.php?/$1 [L] </IfModule>  <IfModule !mod_rewrite.c>     # If we don't have mod_rewrite installed, all 404's     # can be sent to index.php, and everything works as normal.     # Submitted by: ElliotHaughin      ErrorDocument 404 /index.php </IfModule>  AddType image/x-windows-bmp bmp 

So, RewriteBase / will be valid if your application/website is not on a subdomain. However, if it is then you might need to add the folder name after the / symbol.