WordPress instance is marked as broken on CloudLinux OS: timeout: fork system

[Suhitha]

Question: WordPress instance is marked as broken on CloudLinux OS: timeout: fork system call failed: Cannot allocate memory


Symptoms

• WordPress instance is marked as broken on CloudLinux OS:

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timeout: fork system call failed: Cannot allocate memory

• The following errors can be found in the /var/log/plesk/panel.log:

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ERR [extension/wp-toolkit] An error occurred while executing WP-CLI command for instance: WordPress instance #504 ('http://example.com'). timeout: fork system call failed: Cannot allocate memory
ERR [util_exec] proc_close() failed ['/usr/local/psa/admin/bin/filemng' 'johndoe' 'base64' '/var/www/vhosts/example.com/httpdocs/wp-includes/version.php'] with exit code [1]
ERR [panel] '/usr/local/psa/admin/bin/filemng' 'johndoe' 'base64' '/var/www/vhosts/example.com/httpdocs/wp-includes/version.php' failed with code 1.
stdout:
filemng: Error occured during /usr/bin/base64 command: No child processes
System error 10: No child processes

Cause

Misconfiguration in CageFS.


Resolution

1.Log into Plesk.

2.Go to Extensions > My Extensions > CageFS > Open.

3.Disable the subscription system user (and additional user if it exists) by moving it to Disabled form.

4.Enable the subscription system user back by moving it to Enabled form.