[解決済み] リクエストが内部リダイレクトの上限を10回超えている

質問内容

ここ数日、私のウェブサイトが少し遅くなっています。エラーログを調べたところ、このようなものがたくさん見つかりました。

[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

どうすれば原因を突き止められるのでしょうか？

index.phpを中心にループしているようですが、最後の1つは画像で、おそらく私のページ（indexではない）内でリンクされているようです。

私はmvcフレームワークであるcodeigniterを使用しており、すべてがindex.phpファイルを通過するので、どこで間違っているのかを理解するのは少し難しいです。

どうやら.htaccessと関係があるようです（いくつかのブログで言及されています）。

以下は私の.htaccessです。

<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

私は私の.htaccessにいくつかの変更を加えました（基本的に私は最後のブロックの前にトップ条件に削除しました）そして今私はこれを得ます。

[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

今、あるようです。 img というディレクトリが混ざっているのですが、そのディレクトリが全くないのです。以前は、このアドレスで画像用に使っていたサブドメインがありました。

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

遅かったり、ややこしかったりするので、もう使ってません。今は画像の実パスを使うだけです。

なぜこのサブドメインがループしてしまうのでしょうか？私はこのサーバーを設定した人にアクセスできないのです。それは彼が行ったいくつかの構成/設定することができますか？

解決方法を教えてください。

無限ループを防ぐために RewriteCond のような行をルールの上に追加します。

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

RewriteCond %{ENV:REDIRECT_STATUS} ^$ をチェックすることで、ループを防止しています。 mod_rewrite 変数 REDIRECT_STATUS で、最初の内部リダイレクトが成功した後に 200 に設定されます。

参考にしてください。 Apache mod_rewrite の紹介