exasol router | unclear error message when missing servers

[mariadb_exasolrouter]

connection_string=DRIVER=/usr/lib64/maxscale/exasol/current/lib/libexaodbc.so;EXAHOST=34.221.172.180:8563;UID=admin_user;PWD=aBc123%%;FINGERPRINT=NOCERTCHECK

password=aBcd123%

preprocessor=internal:/usr/lib64/maxscale/exasol/maria_preprocessor.py

router=exasolrouter

type=service

user=maxuser

2026-08-20T18:14:40+00:00   info   : (1) [MariaDBProtocol] Connection attributes: _os=Linux _client_name=libmariadb _pid=73972 _client_version=3.4.9 _platform=x86_64 program_name=mysql _server_host=127.0.0.1

2026-08-20T18:14:40+00:00   info   : (1) [MariaDBProtocol] Authenticating client 'admin_user'@'127.0.0.1' using plugin 'mysql_native_password'.

2026-08-20T18:14:40+00:00   error  : (mariadb_exasolrouter); No valid servers from which to query MariaDB user accounts found.

2026-08-20T18:14:40+00:00   warning: (1) [MariaDBProtocol] Authentication failed for user 'admin_user'@[127.0.0.1] to service 'mariadb_exasolrouter'. Originating listener: 'exasol_listener'. MariaDB error: 'Access denied for user 'admin_user'@'127.0.0.1' (using password: YES)'.

2026-08-20T18:14:40+00:00   info   : (1) Stopped mariadb_exasolrouter client session [1] for 'admin_user' from 127.0.0.1 at 'exasol_listener' on 'Worker-11'

error  : (mariadb_exasolrouter); No valid servers from which to query MariaDB user accounts found.

targets=mariadb1