# Known Bugs and Issues
## PostgreSQL
The prometheus-sql-exporter monitoring agent is permanently keeping connections open to all databases, which prevents DROP DATABASE from working. To drop databases, stop prometheus-sql-exporter first. This is possible via the web interface Cockpit: [services#/prometheus-sql-exporter.service](/system/services#/prometheus-sql-exporter.service).
## OmniDB
OmniDB does not use PAM authentication.
## Portal
A direct relogin after a logout does not work. Reloading the page is necessary.
## RedHat / CentOS
pgAdmin4 does not work when SELinux is enabled.
shellinabox does not work when SELinux is enabled.