Cloudflare Developers•3y ago

Randomly getting 520 error on all sites on the server with cloudflare. Please help!

Χαρίλαος ΤηλαβερίδηςOP•11/30/23, 3:13 PM

Χαρίλαος ΤηλαβερίδηςOP•11/30/23, 3:13 PM

here's a recent trace

Χαρίλαος ΤηλαβερίδηςOP•11/30/23, 3:13 PM

domain is altersmoke.gr

Χαρίλαος ΤηλαβερίδηςOP•11/30/23, 3:14 PM

Unfortunatelly I don't have more information to give you at this time, it just happens randomly, it's like having a momentary downtime, if you hit refresh the site loads correctly.

Χαρίλαος ΤηλαβερίδηςOP•11/30/23, 3:15 PM

I've also encountered it on mobile

Χαρίλαος ΤηλαβερίδηςOP•11/30/23, 3:16 PM

Hosting company can't help me, they say everything is good on their side, and I tend to agree because I paused CF for a week on the domain and we haven't encountered any such problems.

Χαρίλαος ΤηλαβερίδηςOP•11/30/23, 3:16 PM

hosting company is Hetzner

Χαρίλαος ΤηλαβερίδηςOP•12/1/23, 8:22 AM

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Just got a fresh one

Χαρίλαος ΤηλαβερίδηςOP•12/1/23, 8:22 AM

Here's the CGI Trace

fl=88f128
h=altersmoke.gr
ip=94.66.66.239
ts=1701418238.544
visit_scheme=https
uag=Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:120.0) Gecko/20100101 Firefox/120.0
colo=ATH
sliver=none
http=http/2
loc=GR
tls=TLSv1.3
sni=plaintext
warp=off
gateway=off
rbi=off
kex=X25519

Χαρίλαος ΤηλαβερίδηςOP•12/1/23, 8:22 AM

can anyone help me troubleshoot? This is very weird and very annoying problem.

Original message was deleted

Χαρίλαος ΤηλαβερίδηςOP•12/1/23, 10:41 AM

Thanks for the reply, upload_max_filesize / post_max_size are set to 6GB

Χαρίλαος ΤηλαβερίδηςOP•12/1/23, 10:42 AM

When I pause CF we never get such error

Χαρίλαος ΤηλαβερίδηςOP•12/2/23, 9:38 AM

I've installed logflare to help with logging i got some recent 520 errors

Χαρίλαος ΤηλαβερίδηςOP•12/2/23, 9:38 AM

here's one

Χαρίλαος ΤηλαβερίδηςOP•12/2/23, 9:38 AM

message.txt4.38KB

Χαρίλαος ΤηλαβερίδηςOP•12/12/23, 11:26 AM

In my case, took forever to find it but I managed to fix it by turning off http2 to origin toggle on cloudflare under domain -> speed -> optimization if anyone needs it in the future.

az•12/13/23, 1:01 AM

does your origin not support http/2 ?

Aaz does your origin not support http/2 ?

Χαρίλαος ΤηλαβερίδηςOP•1/22/24, 10:39 AM

Yes it does and it was (and still is) enabled. So, i believe there was some kind of conflict between cf and my host.

Randomly getting 520 error on all sites on the server with cloudflare. Please help!

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