502 Forum errors - Page 1
Forum section: electronics / general

author: tautech
author_rank: Super Contributor
timestamp: December 02, 2016, 03:44:57 am
content: Not sure if anyone else is getting these but with a page refresh or a new load of this link:https://www.eevblog.com/forum/index.phpORhttps://www.eevblog.com/forum/unreadreplies/For the last 2 days I'm consistantly getting502 - Bad Gateway.Reboot PC.........no difference.Yet this works OK:https://www.eevblog.com/forum/indexPuzzled.Chrome browser, Win 7Is it just my PC ?

author: nanofrog
author_rank: Super Contributor
timestamp: December 02, 2016, 03:49:07 am
content: FWIW I've been having the same problem.Win7-64, IE11 (yeah, I know...)

author: retiredcaps
author_rank: Super Contributor
timestamp: December 02, 2016, 03:54:45 am
content: I saw it briefly over the last couple of days, but after a couple of minutes the error went away.Testing out Fedora 25 with Chrome browser beta.

author: ataradov
author_rank: Super Contributor
timestamp: December 02, 2016, 04:08:30 am
content: Never had this problem, but there were reports of this happening.This happens with vBulletin-based forums sometimes, and cleaning cookies usually helps. Not sure about the reason for this.

author: tautech
author_rank: Super Contributor
timestamp: December 02, 2016, 04:25:33 am
content: Quote from: wilfred on December 02, 2016, 04:17:54 amFixed the Bastard.Yep, good clean up of the History, Cookies and Downloads.Gained nearly 1/3 Gb of HD space too.Thanks guys.

author: trophosphere
author_rank: Frequent Contributor
timestamp: December 02, 2016, 04:34:07 am
content: I had this yesterday as well on Firefox. Clearing the cookies related to the eevblog did not seem to do anything so I cleared everything (history, cache, site preferences, and cookies) and that worked.

author: Zero999
author_rank: Super Contributor
timestamp: December 02, 2016, 08:55:19 am
content: 502 errors are server side, so clearing cookies, history or even using a different browser and operating system won't make any difference. If the errors stopped after you cleared your history and cookies then it's coincidental.

author: trophosphere
author_rank: Frequent Contributor
timestamp: December 02, 2016, 09:12:23 am
content: Quote from: Hero999 on December 02, 2016, 08:55:19 amIn my case it did work because I could access the eevblog forums using Internet Explorer and Opera on my computer while, at the same time, using Firefox the 502 error would show. My media center computer had Firefox installed and it could access the eevblog forums as well (and log into my account) without any 502 error showing. It was only when I cleared everything on Firefox from my original computer was when the 502 error went away. I even accessed the forums at the same time using both computers and only the media center's browser could get through on multiple occasions. Even the browser on my cell phone could get through without a 502 error during the same time it threw a 502 error on my original computer's Firefox.The cause of 502 errors are, by majority, caused server side but they can be caused on the client's side. Just because the error does not start with a 4 does not mean it is not client side at all. Corruption of client side files could cause it.

author: EEVblog
author_rank: Unknown
timestamp: December 02, 2016, 09:16:23 am
content: Yep I had it a few times in the last few days, usually clears on a refresh. Have never lost a post.

author: bktemp
author_rank: Super Contributor
timestamp: December 02, 2016, 09:19:10 am
content: There is no need to clear anything. Just wait some minutes then reload the page fixes the issue.

author: trophosphere
author_rank: Frequent Contributor
timestamp: December 02, 2016, 09:34:28 am
content: Quote from: bktemp on December 02, 2016, 09:19:10 amWaiting a couple minutes did not work in my circumstance. I had this error for at least a day (I probably tried accessing the forums 20-30* times over the course of a day) and they all resulted in 502 errors on my primary computer until I cleared everything. This was while all the rest of my electronic devices could successfully access the forums on that same day on multiple occasions and even at the same time as when I was trying to access it on my primary computer.While I won't rule out there may be something server-side I can only go by what I have experienced.* shows my addiction to this forum.

author: StuUK
author_rank: Frequent Contributor
timestamp: December 02, 2016, 10:47:25 am
content: 502 errors can be caused by the client/browser end, whereby a disagreement on protocol occurs. If you get this consistently between different devices to the same site then it would be a server side/proxy issue, but if it's only on a particular device then it will be something cached on the browser side. Sometimes this occurs when there is a server side/proxy change made which impacts a cached file/cookie/local storage on the browser side.Simplest thing to do is clear your browser cache and try again which often fixes it.

author: MatthewEveritt
author_rank: Unknown
timestamp: December 02, 2016, 02:39:12 pm
content: Something that often works is to add a zero to the end of the url, i.e.https://www.eevblog.com/forum/chat/becomeshttps://www.eevblog.com/forum/chat/0.This just tells it to start on the first page, but for some reason it often helps. It works on threads and boards, but some 'special' pages like the unread replies just take you back the the main forum page sadly. Still, a useful tip.

author: technix
author_rank: Super Contributor
timestamp: December 02, 2016, 03:07:25 pm
content: Dave, check your reverse proxy server. HTTP 502 is a common problem if your application server is under heavy load and timed out.

author: ataradov
author_rank: Super Contributor
timestamp: December 02, 2016, 06:18:39 pm
content: Quote from: Hero999 on December 02, 2016, 08:55:19 amBut server acts based on cookies, and invalid cookie value can make it not respond in time.I can't say for sure here, but there is another forum I frequent, and 502 issue happens there from time to time, and the solution is to delete one specific cookie.

author: nanofrog
author_rank: Super Contributor
timestamp: December 02, 2016, 06:45:19 pm
content: Cleared items one at a time, and when I got to the cookies, it didn't work. Last item cleared was browser history, which did the trick.

author: tautech
author_rank: Super Contributor
timestamp: December 02, 2016, 06:55:23 pm
content: Quote from: ataradov on December 02, 2016, 06:18:39 pmAs a follow up/on I could still get "logged in" forum access from an iPhone and another PC running Win 8.1 and IE.I've had this problem before and generally just closing the forum browser tab or restarting the browser would fix it but not in the latest incidence. Should/when it happens again I'll bit by bit delete the browser settings in order to find the settings that seem to cause it. I suspect it will be the Cookies.

author: tautech
author_rank: Super Contributor
timestamp: December 02, 2016, 06:56:25 pm
content: Quote from: nanofrog on December 02, 2016, 06:45:19 pmAha, I'll keep an eye on this too.