[HTTPD] Random 404 error issue

[netlook]

I have strange problem.

On all sites on one server from time to time users get 404 error. If they refresh the site it loads normally. After a while of browsing, I get another 404 error on another page, after refreshing - its ok. Especialy there is an error on phpBB or other boards, when users writes a post, but it also persist on normal php sites which reffers to another php page on the server (example by include function).

Any idea? I tryed to rebuild apache but it didn't help.

[casey]

Just out of curiosity, check one of the domains with dnsreport.com and see if there are any dns errors listed. One of the nameservers might not be responding...

[netlook]

I increased MinSpareServers and problem seems to be solved.

Thanks