Forum Discussion

yasserMalah's avatar
yasserMalah
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Jul 16, 2025

getting compiling error when enabling Nginx App_potect

i m trying to install NGinx plus with App_ptotect but when trying to enable app_protect module after installing it i get the following error   nginx: [emerg] APP_PROTECT config_set_id 1752649466-87...
application delivery
devops
security
mark124's avatar
mark124
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Feb 02, 2026

This error usually means the NGINX App Protect compiler service is either not running or lacks the permissions to write its configuration files.

Quick Fix Steps

  1. Restart the Services: Ensure the background agents are active. Run:
  2. sudo systemctl restart nginx-appprotect enforcerd
  3. Fix Permissions: The error compile_error_msg.json failed suggests a lock on the directory. Run:
  4. sudo chown -R nginx:nginx /opt/app_protect/
  5. Check Memory: App Protect needs at least 4GB of RAM to compile. If your VPS is low on memory, it will timeout at the 45-second mark.
  6. SELinux: If using RHEL/CentOS, temporarily run setenforce 0 to see if a security policy is blocking the fstat() call.
     i hope this will help you to fix this issue!