Websites on PHP 7.4 and PHP 8.0 are inaccessible on CloudLinux OS: 504 Gateway

[Suhitha]

Question: Websites on PHP 7.4 and PHP 8.0 are inaccessible on CloudLinux OS: 504 Gateway Time-out


Applicable to:

• Plesk for Linux

Symptoms

• Websites that are using PHP 7.4 and PHP 8.0 are inaccessible on CloudLinux OS with the error below:

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504 Gateway Time-out

• PHP 7.4 and PHP 8.0 master process consumes 100% of CPU.
• The following error can be found in /var/log/plesk-php74-fpm/error.log file:

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WARNING: [pool example.com] child 1335278 said into stderr: "ERROR: [pool example.com] CageFS jail error Failed to initialize lve library instance: No such file or directory: No such file or directory (2)"
WARNING: [pool example.com] child 1335278 said into stderr: "ERROR: [pool example.com] child failed to initialize"
ERROR: [pool example.com] Error on LVE enter: LVE(10022)

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WARNING: [pool example.com] child 3682835 said into stderr: "ERROR: [pool example.com] CageFS jail error Failed to initialize lve library instance: Operation not permitted: Operation not permitted (1)", pipe is closed
WARNING: [pool example.com] child 3682835 said into stderr: "ERROR: [pool example.com] child failed to initialize", pipe is closed

Cause

Product issue:

#PPPM-13184 "In Plesk on CloudLinux with enabled CageFS and the latest PHP updates installed, PHP 7.4. and 8.0 no longer consume all the CPU."
Fixed in:
PHP Updates 31 August 2021 (Linux)


Resolution

Please consider updating your server:

• How to update Plesk extensions

Workaround

                                  For CloudLinux 7

For PHP 7.4

1.Log into the server via SSH.

2.Run the command to open PHP 7.4 configuration file:

# systemctl edit plesk-php74-fpm.service

3.Add the line below:

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[Service]
PrivateDevices=false
4.Save changes.

5.Run the command below to apply the changes:

# systemctl restart plesk-php74-fpm.service



For PHP 8.0

1.Log into the server via SSH.

2.Run the command to open PHP 8.0 configuration file:

# systemctl edit plesk-php80-fpm.service

3.Add the line below:

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[Service]
PrivateDevices=false
4.Save changes.

5.Run the command below to apply the changes:
# systemctl restart plesk-php80-fpm.service

Note: in case top command shows that one of the process uses 1
# kill