Jira 8.18.x has PostgresSQL driver version 42.2.16. This version has a bug that breaks support for PostgreSQL instances in Microsoft Azure due to broken gssEncMode.
Example of errors from logs:
Upgrade bundled PostgresSQL JDBC driver to 42.2.23+ version
- This was reported to PostgreSQL at Fallback for gssEncMode connection mode is not working as expected · Issue #1868 · pgjdbc/pgjdbc · GitHub
- Driver 42.2.18 includes a fix for this bug
- fix: properly set cancel socket timeout
- related problem in Confluence
Upgrade driver manually