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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 1752649466-871-149162 not found within 45 seconds
nginx: [emerg] APP_PROTECT fstat() "/opt/app_protect/config/compile_error_msg.json" failed (2: No such file or directory)

 

and i can not start the nginx service, any idea about the issue?

 

application delivery
devops
security

5 Replies

    • yasserMalah's avatar
      yasserMalah
      Icon for Nimbostratus rankNimbostratus
      Jul 16, 2025

      Hi 

      thanks for your reply but i am sure it is installed here is the output query for the isntalled packages 

       

      apt list --installed | grep -E 'nginx-plus|app-protect'

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

      app-protect-attack-signatures/stable,now 2025.07.10-1~focal amd64 [installed]
      app-protect-bot-signatures/stable,now 2025.07.09-1~focal amd64 [installed,automatic]
      app-protect-common/now 11.336.0-1~focal amd64 [installed,local]
      app-protect-compiler/now 11.336.0-1~focal amd64 [installed,local]
      app-protect-geoip/stable,now 2023.10.30-1~focal amd64 [installed,auto-removable]
      app-protect-graphql/now 0.7.0-1~focal amd64 [installed,local]
      app-protect-module-plus/stable,now 34+5.342.0-1~focal amd64 [installed]
      app-protect-plugin/stable,now 6.12.0-1~focal amd64 [installed]
      app-protect-threat-campaigns/stable,now 2025.07.13-1~focal amd64 [installed,automatic]
      nginx-plus-module-appprotect/stable,now 34+5.342.0-1~focal amd64 [installed,automatic]
      nginx-plus/stable,now 34-2~focal amd64 [installed]

  • mark124's avatar
    mark124
    Icon for Nimbostratus rankNimbostratus
    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!