Mod Rewrite Errors Filling Apache Error Log

My Apache error logs are blowing up with the following error but I'm not sure what it means.

[Fri Aug 21 16:29:02.433153 2015] [rewrite:trace2] [pid 1389] mod_rewrite.c(468): [client 78.136.44.20:46348] 78.136.44.20 - - [commerce1.bigdealsmedia.net/sid#7f6c6df3f658][rid#7f6c6de710a0/initial] init rewrite engine with requested uri /
[Fri Aug 21 16:29:02.433191 2015] [rewrite:trace1] [pid 1389] mod_rewrite.c(468): [client 78.136.44.20:46348] 78.136.44.20 - - [commerce1.bigdealsmedia.net/sid#7f6c6df3f658][rid#7f6c6de710a0/initial] pass through /
[Fri Aug 21 16:29:02.433242 2015] [rewrite:trace2] [pid 1389] mod_rewrite.c(468): [client 78.136.44.20:46348] 78.136.44.20 - - [commerce1.bigdealsmedia.net/sid#7f6c6df3f658][rid#7f6c6de730a0/subreq] init rewrite engine with requested uri /index.html
[Fri Aug 21 16:29:02.433249 2015] [rewrite:trace1] [pid 1389] mod_rewrite.c(468): [client 78.136.44.20:46348] 78.136.44.20 - - [commerce1.bigdealsmedia.net/sid#7f6c6df3f658][rid#7f6c6de730a0/subreq] pass through /index.html
[Fri Aug 21 16:29:02.433275 2015] [rewrite:trace2] [pid 1389] mod_rewrite.c(468): [client 78.136.44.20:46348] 78.136.44.20 - - [commerce1.bigdealsmedia.net/sid#7f6c6df3f658][rid#7f6c6de730a0/subreq] init rewrite engine with requested uri /index.cgi
[Fri Aug 21 16:29:02.433281 2015] [rewrite:trace1] [pid 1389] mod_rewrite.c(468): [client 78.136.44.20:46348] 78.136.44.20 - - [commerce1.bigdealsmedia.net/sid#7f6c6df3f658][rid#7f6c6de730a0/subreq] pass through /index.cgi
[Fri Aug 21 16:29:02.433296 2015] [rewrite:trace2] [pid 1389] mod_rewrite.c(468): [client 78.136.44.20:46348] 78.136.44.20 - - [commerce1.bigdealsmedia.net/sid#7f6c6df3f658][rid#7f6c6de730a0/subreq] init rewrite engine with requested uri /index.pl
[Fri Aug 21 16:29:02.433302 2015] [rewrite:trace1] [pid 1389] mod_rewrite.c(468): [client 78.136.44.20:46348] 78.136.44.20 - - [commerce1.bigdealsmedia.net/sid#7f6c6df3f658][rid#7f6c6de730a0/subreq] pass through /index.pl
[Fri Aug 21 16:29:02.433334 2015] [rewrite:trace2] [pid 1389] mod_rewrite.c(468): [client 78.136.44.20:46348] 78.136.44.20 - - [commerce1.bigdealsmedia.net/sid#7f6c6df3f658][rid#7f6c6de730a0/subreq] init rewrite engine with requested uri /index.php
[Fri Aug 21 16:29:02.433340 2015] [rewrite:trace1] [pid 1389] mod_rewrite.c(468): [client 78.136.44.20:46348] 78.136.44.20 - - [commerce1.bigdealsmedia.net/sid#7f6c6df3f658][rid#7f6c6de730a0/subreq] pass through /index.php
[Fri Aug 21 16:29:02.433359 2015] [rewrite:trace2] [pid 1389] mod_rewrite.c(468): [client 78.136.44.20:46348] 78.136.44.20 - - [commerce1.bigdealsmedia.net/sid#7f6c6df3f658][rid#7f6c6de730a0/subreq] init rewrite engine with requested uri /index.xhtml
[Fri Aug 21 16:29:02.433365 2015] [rewrite:trace1] [pid 1389] mod_rewrite.c(468): [client 78.136.44.20:46348] 78.136.44.20 - - [commerce1.bigdealsmedia.net/sid#7f6c6df3f658][rid#7f6c6de730a0/subreq] pass through /index.xhtml
[Fri Aug 21 16:29:02.433383 2015] [rewrite:trace2] [pid 1389] mod_rewrite.c(468): [client 78.136.44.20:46348] 78.136.44.20 - - [commerce1.bigdealsmedia.net/sid#7f6c6df3f658][rid#7f6c6de730a0/subreq] init rewrite engine with requested uri /index.htm
[Fri Aug 21 16:29:02.433388 2015] [rewrite:trace1] [pid 1389] mod_rewrite.c(468): [client 78.136.44.20:46348] 78.136.44.20 - - [commerce1.bigdealsmedia.net/sid#7f6c6df3f658][rid#7f6c6de730a0/subreq] pass through /index.htm
[Fri Aug 21 16:29:02.433409 2015] [autoindex:error] [pid 1389] [client 78.136.44.20:46348] AH01276: Cannot serve directory /var/www/: No matching DirectoryIndex (index.html,index.cgi,index.pl,index.php,index.xhtml,index.htm) found, and server-generated directory index forbidden by Options directive

My .htaccess looks like this.

Options +FollowSymLinks
RewriteEngine On

# Rewrite item.php
RewriteRule ^item/([a-z0-9]+)/.+$ /item.php?item_id=$1 [L]

# Rewrite page.php
RewriteRule ^page/([a-z0-9]+)/.+$ /page.php?page_id=$1 [L]

# Rewrite sitemap.xml
RewriteRule ^sitemap.xml$ sitemap.php [L]

# Remove .php from URL
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME}\.php -f
RewriteRule ^(.*)$ $1.php

# Remove www from URL
RewriteCond %{HTTP_HOST} ^www\.(.+)
RewriteCond %{HTTPS}s/%1 ^(on(s)|offs)/(.+)
RewriteRule ^ http%2://%3%{REQUEST_URI} [L,R=301]

Hoping someone can point me in the right direction.