Overview
MetaDefender Core may lose PostgreSQL connectivity following an upgrade on Ubuntu systems with CIS (Center for Internet Security) hardening enabled.
Symptoms
Web Console becomes inaccessible after completing a MetaDefender Core upgrade
Error page displayed when attempting to access the Web Console
The following error appears in the application logs:
[ERROR ] 2025.08.14 03:20:11.504: (core.postgres) Postgres issue,
error='Starting postgres service failed',
param='Warning: Tt file, source configuration file or drop-ins of ometascan-pg.service changed on disk.
Run 'systemctl daemon-reload' to reload.
' [msgid: 4084]
Root Cause
This issue appears to be related to a systemctl behavior when CIS hardening is applied to the system. The exact cause is currently under investigation.
Solution
Restart the MetaDefender Core service:
# Use systemctl
systemctl restart ometascan
# Or use service
service ometascan restart
Additional Notes
This issue is specific to CIS-hardened Ubuntu environments
The service restart resolves the connectivity issue immediately
No data loss or configuration changes are required
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Troubleshooting