Error headers: ap_headers_output_filter() after putting cache header in htaccess file

Question

Receiving error:

[debug] mod_headers.c(663): headers: ap_headers_output_filter()

after I included this within the .htaccess file:

# 6 DAYS
<FilesMatch "\.(ico|pdf|flv|jpg|jpeg|png|gif|js|css|swf)$">
Header set Cache-Control "max-age=518400, public"
</FilesMatch>
 
# 2 DAYS
<FilesMatch "\.(xml|txt)$">
Header set Cache-Control "max-age=172800, public, must-revalidate"
</FilesMatch>
 
# 2 HOURS
<FilesMatch "\.(html|htm)$">
Header set Cache-Control "max-age=7200, must-revalidate"
</FilesMatch>

Any help is appreciated as to what I could do to fix this?

Solution

Generally since this is a debug level error/notice, you can turn it off in Apache config (perhaps /etc/apache2/sites-enabled/somesite, /etc/apache2/httpd.conf or /etc/apache2/apache2.conf or perhaps a .htaccess file) by setting a line to:

LogLevel warn

as opposed to:

LogLevel debug

Comments

[MrWhite]

"or perhaps a .htaccess file" - You can't actually set this in .htaccess, it needs to be in the main server config or virtualhost.