Issue All Domains Apache2/Error 500

[AntonM@Parallels]

Based on what we know, we prepared a knowledge base article:

Website suddenly started to show 500 error: AH10292: Invalid proxy UDS filename

Applicable to: Plesk Obsidian for Linux Symptoms The website suddenly started to show 500 error: PLESK_ERROR: AH10292: Invalid proxy UDS filename (proxy:unix:///var/www/vhosts/system/example.co...

support.plesk.com

 

[PrimeSites]

Got woken up with downtime alerts from 120 sites and frantically looked for answers for 20 mins.
The article that AntonM@Parallels posted did the trick.

Website suddenly started to show 500 error: AH10292: Invalid proxy UDS filename

Applicable to: Plesk Obsidian for Linux Symptoms The website suddenly started to show 500 error: PLESK_ERROR: AH10292: Invalid proxy UDS filename (proxy:unix:///var/www/vhosts/system/example.co...

support.plesk.com

 

[Wai Hong]

Thanks for the solution. Like above, its gave me heart attack this morning.

 

[kingslot88org]

thanks for the information...

 

[Talistech]

I also woke up with all of my websites being down.
The fix is working fine. Website suddenly started to show 500 error: AH10292: Invalid proxy UDS filename

 

[LTUser]

The error seems to be fixed, after another 2.4.9 installation this morning from PPA for Apache 2.x : Ondřej Surý the error no longer occurs.

 

[shopuser]

Hello, i have the problem since today morning at my 2 servers at all FPM sites with ubuntu 20.04 i mean after the updates :

apache2 2.4.41-4ubuntu3.5 vom Repository Ubuntu for focal-updates by Ubuntu (vorherige Version: 2.4.41-4ubuntu3.4 vom Repository now)
- apache2-bin 2.4.41-4ubuntu3.5 vom Repository Ubuntu for focal-updates by Ubuntu (vorherige Version: 2.4.41-4ubuntu3.4 vom Repository now)
- apache2-data 2.4.41-4ubuntu3.5 vom Repository Ubuntu for focal-updates by Ubuntu (vorherige Version: 2.4.41-4ubuntu3.4 vom Repository now)
- apache2-utils 2.4.41-4ubuntu3.5 vom Repository Ubuntu for focal-updates by Ubuntu (vorherige Version: 2.4.41-4ubuntu3.4 vom Repository now)
- libdrm-common 2.4.105-3~20.04.2 vom Repository Ubuntu for focal-updates by Ubuntu (vorherige Version: 2.4.105-3~20.04.1 vom Repository now)
- libdrm2 2.4.105-3~20.04.2 vom Repository Ubuntu for focal-updates by Ubuntu (vorherige Version: 2.4.105-3~20.04.1 vom Repository now)
- libnetplan0 0.103-0ubuntu5~20.04.1 vom Repository Ubuntu for focal-updates by Ubuntu (vorherige Version: 0.102-0ubuntu1~20.04.2 vom Repository now)
- linux-firmware 1.187.17 vom Repository Ubuntu for focal-updates by Ubuntu (vorherige Version: 1.187.16 vom Repository now)
- netplan.io 0.103-0ubuntu5~20.04.1 vom Repository Ubuntu for focal-updates by Ubuntu (vorherige Version: 0.102-0ubuntu1~20.04.2 vom Repository now)
- postfix 3.4.13-0ubuntu1.2 vom Repository Ubuntu for focal-updates by Ubuntu (vorherige Version: 3.4.13-0ubuntu1.1 vom Repository now)
- postfix-pcre 3.4.13-0ubuntu1.2 vom Repository Ubuntu for focal-updates by Ubuntu (vorherige Version: 3.4.13-0ubuntu1.1 vom Repository now)
- python3-update-manager 1:20.04.10.9 vom Repository Ubuntu for focal-updates by Ubuntu (vorherige Version: 1:20.04.10.7 vom Repository now)
- update-manager-core 1:20.04.10.9 vom Repository Ubuntu for focal-updates by Ubuntu (vorherige Version: 1:20.04.10.7 vom Repository now)

 

[hillcow]

The article from Plesk doesn't help me, the first command returns this error (Ubuntu 18.04):

The following packages have unmet dependencies:
apache2 : Depends: apache2-bin (= 2.4.29-1ubuntu4) but 2.4.29-1ubuntu4.17 is to be installed
Depends: apache2-utils (= 2.4.29-1ubuntu4)
Depends: apache2-data (= 2.4.29-1ubuntu4) but 2.4.29-1ubuntu4.17 is to be installed
E: Unable to correct problems, you have held broken packages.

 

[Wikibear]

This article doesn't work for me:

apt list -a apache2
Listing... Done
apache2/now 2.4.41-4ubuntu3.5 amd64 [installed,local]

export version="2.4.41-4ubuntu3"; apt-get install apache2=$version apache2-utils=$version apache2-data=$version apache2-bin=$version
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Version '2.4.41-4ubuntu3' for 'apache2' was not found
E: Version '2.4.41-4ubuntu3' for 'apache2-utils' was not found
E: Version '2.4.41-4ubuntu3' for 'apache2-data' was not found
E: Version '2.4.41-4ubuntu3' for 'apache2-bin' was not found

OS
Ubuntu 20.04.3 LTS
Product
Plesk Obsidian
Version 18.0.38 Update #2, last updated on Sept 21, 2021 03:18 AM

 

[duaatahli]

Switching to FastCGi instead of PHP-FPM solved the problem for me

 

[VirtualCed]

Yes, had this automatic update on our server lastnight, killed 80 websites instantly...

Ran these commands to update to Apache 2.4.49 (Which has fixed the problem for me) - for anyone who isn't tech savvy.

sudo add-apt-repository ppa:ondrej/apache2
sudo apt install apache2

Man, you saved my life ! Thanks

 

[misterMC]

Yes, had this automatic update on our server lastnight, killed 80 websites instantly...

Ran these commands to update to Apache 2.4.49 (Which has fixed the problem for me) - for anyone who isn't tech savvy.

sudo add-apt-repository ppa:ondrej/apache2
sudo apt install apache2

we were about to restore our last snapshots and you save us hours. Thanks! It did the job.

 

[doctorbutts]

500 error just killed everything.
Both downgrading to 2.4.41-4ubuntu3 and upgrading to 2.4.49 via ondrej repo worked except for mod_rewrite, regardless of FastCGi or PHP-FPM

 

[Wikibear]

This Workaround work now for me.

sudo add-apt-repository ppandrej/apache2
sudo apt install apache2

 

[Linnl71]

What can we do to prevent such issues from happening again?

 

[aaronduce]

Yes, had this automatic update on our server lastnight, killed 80 websites instantly...

Ran these commands to update to Apache 2.4.49 (Which has fixed the problem for me) - for anyone who isn't tech savvy.

sudo add-apt-repository ppa:ondrej/apache2
sudo apt install apache2

This is the one for most it seems - worked for us all sites back up no problems

 

[Linnl71]

This is the one for most it seems - worked for us all sites back up no problems

It worked for me too! Although it appears to be a different solution from: Website suddenly started to show 500 error: AH10292: Invalid proxy UDS filename.

sudo add-apt-repository ppandrej/apache2
sudo apt install apache2

Hope this wouldn't give any long term issues!

 

[LuBre]

Get Versions, choose an earlier version, 2.4.29-1ubuntu4 may not be your system so adjust the install command (below) to an earlier version that you see.

apt list -a apache2

Downgrade version (some dependancies)

apt-get install apache2=2.4.29-1ubuntu4 apache2-bin=2.4.29-1ubuntu4 apache2-utils=2.4.29-1ubuntu4 apache2-data=2.4.29-1ubuntu4

I'm trying to follow this procedure but I am stuck. When I run

apt list -a apache2

This is what I get:

/etc/apache2/sites-enabled$ apt list -a apache2

WARNING: apt does not have a stable CLI interface. Use with caution in scripts.

Listing...
apache2/bionic 2.4.49-3+ubuntu18.04.1+deb.sury.org+2 amd64 [upgradable from: 2.4.29-1ubuntu4.17]
apache2/bionic-updates,bionic-security,now 2.4.29-1ubuntu4.17 amd64 [installed,upgradable to: 2.4.49-3+ubuntu18.04.1+deb.sury.org+2]
apache2/bionic 2.4.29-1ubuntu4 amd64

So, at this point, what should I do?

 

[psjavi]

Switching to FastCGi instead of PHP-FPM solved the problem for me

Thanks mate, it worked also for me. I'll wait for the final resolution from Plesk. But for now, this is the fastest and easiest solution to solve the problem.

 

[IgorG]

I'll wait for the final resolution from Plesk.

We are going to release an update with the fix very soon.