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Host Not Configured to Serve Web Traffic

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nat4200
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27 Mar 2012, 8:40 pm

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Last edited by nat4200 on 21 Apr 2012, 1:49 am, edited 1 time in total.

sliqua-jcooter
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27 Mar 2012, 8:42 pm

nat4200 wrote:
I can reproduce PM's issue by sending a 404 when the browser requests /css/style2.css (it does so first from wrongplanet.net and is redirected to try from www.wrongplanet.net)

ie.
Image

The only external request before the stylesheet is to http://w.sharethis.com/button/buttons.js


Yeah, I had a similar issue while I was out at the datacenter (on the same network as the WP servers). We were dealing with a maintenance at the time that introduced some packet loss/latency, etc - so I didn't think much of it at the time.


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Cornflake
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27 Mar 2012, 8:43 pm

Hmm. A wget on that external link successfully retrieved the .js file from here.


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nat4200
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27 Mar 2012, 8:51 pm

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Last edited by nat4200 on 21 Apr 2012, 1:49 am, edited 1 time in total.

sliqua-jcooter
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27 Mar 2012, 8:53 pm

nat4200 wrote:
Cornflake wrote:
Hmm. A wget on that external link successfully retrieved the .js file from here.


Sorry, I used a HTTP proxy program and told it to send 404 responses for the style2.css request. My point was that I don't think the css issue encountered would be explained by an issue loading an external resource in this case, more likely it would seem something prevented the css resource from loading for PM when he encounter the issue..


Not necessarily, I was able to re-create the issue a few days ago during a situation where I only had partial routes to the Internet (BGP reconvergence for the win). It's entirely possible that dynamic content is being loaded from one cloudflare location, and static content from another.


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Cornflake
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27 Mar 2012, 8:53 pm

@nat4200: 'sOk - I was just poking about in "random help" mode. :lol:


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Cornflake
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27 Mar 2012, 8:57 pm

sliqua-jcooter wrote:
It's entirely possible that dynamic content is being loaded from one cloudflare location, and static content from another.
Good point, and may go towards explaining why it was at least a week before I saw any Cloudflare error dialogs here when others on WP were already reporting them.


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nat4200
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27 Mar 2012, 8:59 pm

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Last edited by nat4200 on 21 Apr 2012, 1:49 am, edited 1 time in total.

Cornflake
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27 Mar 2012, 9:02 pm

nat4200 wrote:
@Cornflake: I hope that's OK, that's what I'm doing too!!? :lol:
Psh, of course it is! :wink:


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sliqua-jcooter
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27 Mar 2012, 9:05 pm

Cornflake wrote:
sliqua-jcooter wrote:
It's entirely possible that dynamic content is being loaded from one cloudflare location, and static content from another.
Good point, and may go towards explaining why it was at least a week before I saw any Cloudflare error dialogs here when others on WP were already reporting them.


As you so astutely put it before, since we don't have any real insight into the cloudflare caching platform, all we can do is guess - but this is my theory (I lack any kind of empirical evidence to back this up, but it seems to make sense in my head):

Something with how WP handles session timeouts is being interfered with by introducing cloudflare - so sessions are timing out when they shouldn't. This, in turn, is causing the session cookies to become irrelevant, and when WP tries to re-direct the user to a login page, it's passing some kind of variable that's tricking cloudflare into freaking out.


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Cornflake
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27 Mar 2012, 9:12 pm

Yep, I'll buy that.
It's also pretty much confirmed by restarting the browser or clearing session cookies - both forcing fresh ones.


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sliqua-jcooter
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27 Mar 2012, 9:16 pm

nat4200 wrote:
sliqua-jcooter wrote:
Cornflake wrote:
sliqua-jcooter wrote:
It's entirely possible that dynamic content is being loaded from one cloudflare location, and static content from another.
Good point, and may go towards explaining why it was at least a week before I saw any Cloudflare error dialogs here when others on WP were already reporting them.


As you so astutely put it before, since we don't have any real insight into the cloudflare caching platform, all we can do is guess - but this is my theory (I lack any kind of empirical evidence to back this up, but it seems to make sense in my head):

Something with how WP handles session timeouts is being interfered with by introducing cloudflare - so sessions are timing out when they shouldn't. This, in turn, is causing the session cookies to become irrelevant, and when WP tries to re-direct the user to a login page, it's passing some kind of variable that's tricking cloudflare into freaking out.

This might be pedantic, but I thought the site's "session" at the client side did not use "session cookies".


It doesn't *only* use session cookies (session tracking on a user-basis is done server-side) but pretty much any session-based web application has to use some kind of identifying cookie to track the client.

EDIT: you can even look at it in your browser - it's called PHPSESSID


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nat4200
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27 Mar 2012, 9:20 pm

Redacted



Last edited by nat4200 on 21 Apr 2012, 1:49 am, edited 1 time in total.

sliqua-jcooter
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27 Mar 2012, 9:22 pm

nat4200 wrote:
sliqua-jcooter wrote:
nat4200 wrote:
sliqua-jcooter wrote:
Cornflake wrote:
sliqua-jcooter wrote:
It's entirely possible that dynamic content is being loaded from one cloudflare location, and static content from another.
Good point, and may go towards explaining why it was at least a week before I saw any Cloudflare error dialogs here when others on WP were already reporting them.


As you so astutely put it before, since we don't have any real insight into the cloudflare caching platform, all we can do is guess - but this is my theory (I lack any kind of empirical evidence to back this up, but it seems to make sense in my head):

Something with how WP handles session timeouts is being interfered with by introducing cloudflare - so sessions are timing out when they shouldn't. This, in turn, is causing the session cookies to become irrelevant, and when WP tries to re-direct the user to a login page, it's passing some kind of variable that's tricking cloudflare into freaking out.

This might be pedantic, but I thought the site's "session" at the client side did not use "session cookies".


It doesn't *only* use session cookies (session tracking on a user-basis is done server-side) but pretty much any session-based web application has to use some kind of identifying cookie to track the client.

Session cookies doesn't mean cookies used for session tracking. A session cookie is a cookie with no explicit expiry date that the browser deletes when all "sessions" it has with the site (or path) that cookie applies to are closed (eg. all tabs/windows which are open in the browser for the site)


We're talking about two different contexts of "sessions".


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nat4200
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27 Mar 2012, 9:27 pm

Redacted



Last edited by nat4200 on 21 Apr 2012, 1:50 am, edited 1 time in total.

MrXxx
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27 Mar 2012, 9:43 pm

Just a quick update:

Three times now, consistant:

The page shows up for me only after being signed on for a long time (several hours), then begins to show up when any link is clicked. Every time, the only thing I have done is restart the browser, and it stops.


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