The "CageFS jail error Failed to set permissions to... (Operation not permitted): Operation not permitted (1)" warning

Issue

The error log may contain the following warnings:

WARNING: [pool domain.com] child 1241803 exited with code 70 after 0.003693 seconds from start
WARNING: [pool domain.com] child 1241805 said into stderr: "ERROR: [pool domain.com] CageFS jail error Failed to set permissions to /home/httpd/vhosts/domain.com/.cagefs/tmp (Operation not permitted): Operation not permitted (1)"
WARNING: [pool domain.com] child 1241805 said into stderr: "ERROR: [pool domain.com] child failed to initialize"

Environment

• CloudLinux OS
• Plesk

Solution

1. Check and fix permissions with

   # plesk repair fs domain.com -v

2. If it did not help, set valid owner to the .cagefs/tmp subdirectory of the affected user:

   # ls -la /home/httpd/vhosts/domain.com/.cagefs/tmp

Cause

Invalid file system permissions of the .cagefs/tmp subdirectory.