Return of 502- Bad gateway Error

[alm]

Probably caching/session related, rather than browser/OS.

[not1xor1]

Probably caching/session related, rather than browser/OS.

yes... reloading the page via F5 solved the problem in firefox 

[richnormand]

From: 1GHz

""
Quote from: ebastler on Yesterday at 04:29:42 PM
Mate, this error has nothing to do with your computer. It's the server which has problems. No need for you to reboot or fiddle around otherwise.

You are right.
HTTP error codes 5xx are server side errors. Not client side.

""





You are both right of course. The original 502 gateway error is server side.

However since my main computer was always showing the error but simultaneously my laptop did not have issues both connected to the forum at the same time from the same cable modem via my router obviously something was different between the two computer. Cleaning cookies and cache on the machine cleared it. I assume my Chrome browser had the initial 502 page in its cache...

Has not come back yet. Next time I'll see if that is reproducible.



 

[tablatronix]

heh, this is a server side issue and a problem with resources, not something clients are doing. There is nothing you can do to workaround it.

Most likely a bad configuration relating to sql timeouts and buffer sizes, or max_connections being too small, or a memory leak in sql or forum code most likely. I am guessing config , since this issue arises with growth and traffic.

[StillTrying]

heh, this is a server side issue and a problem with resources, not something clients are doing.

It starts off as a temporary server problem, but then becomes a bigger problem - for most users, the way the 502 page is cached.
I saw very few 502s yesterday, but tried to capture some of their headers, to me 304 seemed right, but 14400 seemed wrong, but that could very easily be because I had no idea what I was doing!

traffic.

I usually have the main index page open in another tab, so have been looking at the number of guests and users when I see some 502s, very roughly, so far the 502s seem to appear when the number of guests and users is low-ish rather than high-ish.

[alm]

What is the cause and what is the effect? Could it be that many of the guests (some of which bots) stop trying if they see errors popping up? Like a reasonable person would do, instead of some of you addicts .

[Electro Detective]

I shut down ALL page/s when the 502 appears and try the site again later

Pumping the F5 button and various reload/clear/refresh force tricks    isn't doing the EEVblog server or boss Dave any favors,
especially whilst trying to sort itself out, AND keep up with the extra  'addicts'  demand 

[MarkS]

extra  'addicts'  demand

Off to take a hit of "Projects, Designs and Technical Stuff"...

[tautech]

Pumping the F5 button and various reload/clear/refresh force tricks    isn't doing the EEVblog server or boss Dave any favors,
especially whilst trying to sort itself out, AND keep up with the extra  'addicts'  demand 

Nor is having a forum that was basically unusable for ~3hrs yesterday.
Online #'s dropped right away as most couldn't be bothered with the BS.
Maybe the new RAM that was installed a few weeks back is crook or there's a virus in the server as up until a week or two back the forums been better than ever.

[StillTrying]

Nor is having a forum that was basically unusable for ~3hrs yesterday.

Would your ~3hrs happen to be very close to 4hrs?

[tautech]

Nor is having a forum that was basically unusable for ~3hrs yesterday.

Would your ~3hrs happen to be very close to 4hrs?

It was shite for most of yesterday afternoon but worst from ~3pm until just after 6 NZT.
The post list on the main page just showed a few posts in that time, some were mine after bashing the shite out of F5. 

[StillTrying]

On the few browsers I've tried, ctrl-reload or ctrl-refresh always gets passed the caching, (I don't know about ctrl-F5) often giving just another 502! - so wait a bit before trying that thread again.

I think if all 1200 guests and 250 users were doing that it would slow down the recovery, so don't tell anyone.

[pknoe3lh]

got some 502 before .....

Now its time for more information:

http://rsgiveaway.knoebel.at/loadtime.php

I wrote an Cornjob which checks the side every 1 Minute.
It also shows users and guests and should also detect 502 ;-)
The link shows a graph with the captured data.
 

[Electro Detective]

Killa performance in Kangaroo Central today 

boss Dave has pumped server with Virtual Adrenaline software?   

[Gary350z]

No 502's on Chrome or IE for about 2 days. 

Previous 2 days the forum was unusable on any browser.

[pknoe3lh]

Even though clearing my browser cache sometimes seems to resolve the issue it definitely doesn't always. So, for that reason alone I am prepared to believe those who comment and seem to know, this is ultimately a server problem. I hope we get some clarity about the issue soon so this speculation can be put to rest. At least for now.

Maybe if you get an 502 check with my graph if it is correlated ;-)

http://rsgiveaway.knoebel.at/loadtime.php

[ebastler]

Maybe if you get an 502 check with my graph if it is correlated ;-)

http://rsgiveaway.knoebel.at/loadtime.php

Your graph is lacking labels or units on the time axis, which makes it difficult to correlate anything. Could you add labels?

[PA0PBZ]

Your graph is lacking labels or units on the time axis, which makes it difficult to correlate anything. Could you add labels?

Point your mouse at the loadtime line.

[nugglix]

Your graph is lacking labels or units on the time axis, which makes it difficult to correlate anything. Could you add labels?

Point your mouse at the loadtime line.

 
Doesn't help much, I'd say.

[pknoe3lh]

Your graph is lacking labels or units on the time axis, which makes it difficult to correlate anything. Could you add labels?

UPDATE:

http://rsgiveaway.knoebel.at/loadtime.php

I'm using google charts .. they should handle all the front end ... but yes i tried 10 different things no luck ...
The only work around i found was to use the Tooltip!
After some time (1 Day) the grid lines should be showing up.. just not working under one day 

[ebastler]

UPDATE:
http://rsgiveaway.knoebel.at/loadtime.php
[...]
The only work around i found was to use the Tooltip!

Thanks, the tool tip does help! The preliminary conclusion from your data seems to be that inordinate load times (and hence probably 502 errors as well?) are not correlated with an unusually high number of users?

[eugenenine]

somebody spank that gateway already

[DG41WV]

F5 worked for me.

windows 8.1                Firefox 54.0.1

[linux-works]

or a memory leak

they dont use liquid memory anymore.

so, thats not it.

[pknoe3lh]

Detected some 502 2 hour ago ... 

http://rsgiveaway.knoebel.at/loadtime.php

did some have problems?