I don't usually like posting for this sort of question because it can seem so vague and its the sort of thing that cannot be easily replicated.
Basically all day today I have been receiving blank white screens on various of the sites I have under my reseller account. Now blank white screen to me usually screams PHP fatal error. But there are no such errors in the logs. Not only this but the white screens are very VERY intermittent. I have received the trying to log in, then log in works, I have received them trying to view posts on my forum, then the posts work. I have received them on my wiki then the wiki works. There seems to be no rhyme or reason to it. It is strange that it is across various domains too. I assumed it must be my end, even though I was accessing my sites from both home and work (both with different ISPs). Until i got home tonight and some of my users are complaining of the same thing.
If I get a blank white screen I did a view source and I am getting this:
so JS is setting some sort of cookie. What cookie I don't know as it appears to be encrypted or something. But that cookie is not being set from my code as it isn't in the source when the page loads successfully. So it may be a firefox firebug thing, I don't know, I have no idea what this cookie does or is.
Not only this but my firebug console also appears to be showing 301 moved permanently redirects for my site - but not every time I load the site. Which is weird, as I don't have any .htaccess rules redirecting anything.
I have attached an example screenshot of my firebug output. What is bizarre is it tries to GET my website and I get a response:
"Failed to load source for: http://www.ukhhf.co.uk/forum"
but then it does the GET again and it is successful, on the exact same domain, subdomain and directory (www.ukhhf.co.uk/forum).
The actual response header I receive when it fails to load (blank white screen) is:
Date Sun, 13 Sep 2009 11:00:28 GMT
Content-Type text/html; charset=UTF-8
It is starting to get a little frustrating, so I contacted the helpdesk and spoke to someone there who told me the sites were coming up fine for them, so there was no issue on the server side. I explained that it was very intermittent and across several users and ISPs but he was happy with it not being server side, so now that is why I am here.
I have been a web developer for years now so it baffles and frustrates me when something inexplicable like this occurs and I cannot find the source of the issue.
Even now as I have been typing this I have been receiving issues with the following sites:
Can anyone help?