Return of 502- Bad gateway Error

[grumpydoc]

And... it's back     

With a vengeance!

[Muttley Snickers]

Good, with no forum to read lately I was starting to get some overdue stuff done around here anyway. I got three outages in a row over about five minutes.

What a bugger, I thought we had it nailed.   
   

[H.O]

I'm sorry if this is completely unrelated, I haven't been following this thread but on this laptop of mine - for the last two days or so - I have not been able to (and still can't) reach the forum using IE (Edge), however using Chrome works.

[gnif]

I'm sorry if this is completely unrelated, I haven't been following this thread but on this laptop of mine - for the last two days or so - I have not been able to (and still can't) reach the forum using IE (Edge), however using Chrome works.

If you want help you must let us know what "still cant" means? do you get an error? what error?... etc.

As for the new outages... working on it, again please don't report for now, I will let you all know when I am done.

[H.O]

I'm sorry...
As of right now at this moment I can not reach the forum using IE, I get the 502-Bad gateway error message/page.
However, using Chrome I'm able to reach the forum and write this post.

I open IE (Edge) and browse to eevblog.com/forum and get the 502 error page. open Chrome and browse to eevblog.com/forum and it works, I try again with IE still get the 502. And that's how it's been for me the last two days or so.

[Electro Detective]

Guys, PLEASE !!!   

Cut the EEVblog admin some slack here,
running servers isn't like troubleshooting bad capacitors or fried diodes whilst googling repair tips, eating maccas and listening to Abba in the background

Try and understand this alien lingo, and put yourself in the admin's shoes..
http://technet.microsoft.com/en-us/library/bb794799.aspx
 

[H.O]

I, for one, certainly didn't mean to criticize anyone I was mearly trying to help. If I was  or if anyone (admin in particullar) felt I was criticizing I appologize.

[HighVoltage]

I have noticed that when I got the 502 error, the next time I log on, I have to refresh the page (F5) otherwise the error stays in the cache. And this is the same for every subforum I am in. Each one needs a F5, if it previously had the error.

Today I had no problems at all.
Thanks for fixing it.
 

[RoGeorge]

I can access the main page, "https://www.eevblog.com/forum/" or any topic I am clicking, but

constantly getting 502 - Bad Gateway errors when I'm logged in and access the two links near my avatar on the top of the page
- Show unread posts since last visit.
- Show new replies to your posts.

For me, the forum was unusable in the last couple of days.
 

[RoGeorge]

And now, after a few F5 (refresh page) over the 502 err pages, all is working OK.

I don't understand why 502 Err keeps coming back after a few days/weeks, and why each time there is another way to solve it. Last time it was to switch from http to https, now it's just an F5. I don't get it. 

[pknoe3lh]

And now, after a few F5 (refresh page) over the 502 err pages, all is working OK.

I don't understand why 502 Err keeps coming back after a few days/weeks, and why each time there is another way to solve it. Last time it was to switch from http to https, now it's just an F5. I don't get it. 

The browser is just caching it! Thats all!
The idea behind it is to reduce the load in case of an error. (everyone is just trying to reload)
So if you reload the side again it will not see your request => less load!

some browsers are overdoing it 
so the cache will stay too long.

when you enter https instead of http its a new side for the browser and it will not load it from the cache.

So it depends on your browser. For some its enough to hit F5 a lot
Others you need to press SHIFT and F5 at the same time.

so good luck fixing your problem 

[gnif]

Update: I have made a few changes and enabled some additional metrics collection, I would not consider the issue resolved at this point. Before proceeding any further I need to wait a day or two to collect more data to see if a pattern emerges.

[joeqsmith]

Strange and maybe not a clue but Win7 Explorer will give me the 502 with http.  https, nothing else I don't have the problem.  Switch back, 502 returns.  Back to s, goes away.   Win10 box Explorer at same time without s, no 502.   Very strange and makes no sense but seems repeatable. 

[tautech]

Another session ~20 mins ago and this fixed it 

[EEVblog]

I got it again today too, this is not good.

[xrunner]

Same here. 

[pknoe3lh]

It looks much better!

http://rsgiveaway.knoebel.at

The last fix did a lot I think. Now the outtakes are very short and less frequent.

[WastelandTek]

briefly here also, not like before though

[gnif]

Further changes went in today that should help with things, I have also noted that there is a nasty plugin on the wordpress website issuing some pretty poor queries. Dave is now migrating to a new plugin that should fix this.

[EEVblog]

Further changes went in today that should help with things, I have also noted that there is a nasty plugin on the wordpress website issuing some pretty poor queries. Dave is now migrating to a new plugin that should fix this.

Yep, this was Podpress. We have moved over to a new podcasting system (which even the Podpress author recommends) and an issue I have had with slow logging into wp-admin has now gone.
Hopefully this was the problem.

[gnif]

Almost 24 hours since the last detected 502's ... we might have this all sorted now . Anyone have any more 502's that a refresh wont fix, please report them here.

[hermit]

Show new replies to your posts.

That link gives me a 502 still.

[gnif]

Show new replies to your posts.

That link gives me a 502 still.

Force refresh then, it's cached. 502s are entire website wide, not just one page.

[hermit]

Hmm...  Update must have trashed my settings.  I do some web work here and there and set my browser not to cache.  Refreshing wasn't helping but dumping the cache, which wasn't supposed to be on, did work.

[gnif]

You want to reveal what you think the cause of the problem was? Or not.

Two things.

1) Microsoft (aka, Bing) hammering the search on the forum. Seems their crawler uses the search feature of the forum to look for keywords, which was causing quite high server load when the crawl started each time.

2) The podcast plugin for the forum