Request exceeding limit of 10 redirects wordpress


We have a multisite install.

domain mapping (admin & login using mapped domain)
wordpress version: 3.9.2

We have a single website on the network that when we attempt to visit the admin area, we are getting a major delay and many times, timeout. We are also on occasion getting My SQL database connection errors for this single website.

Here is the .htaccess file:

# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]

# add a trailing slash to /wp-admin
RewriteRule ^wp-admin$ wp-admin/ [R=301,L]

RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^ - [L]
RewriteRule ^(wp-(content|admin|includes).*) $1 [L]
RewriteRule ^(.*\.php)$ wp/$1 [L]
RewriteRule . index.php [L]
# END WordPress

We are getting this in our error log file:

Request exceeding limit of 10 redirects

and many times, when editing a post, we are getting a connection lost error from WordPress. Any other ideas?

We can access other websites on the network with no troubles, no timeouts, etc.

Thank you.