Bug reference: 15012 Logged by: Константин Калинин Email address: konstantin@kkalinin.pro PostgreSQL version: 10.1 Operating system: Xubuntu 16.04 Description:
I had PosgreSQL 9.6 server, that ran on 5432 port and installed 10.1 simultaneously so it started to use 5433 port. Both were installed via apt repo http://apt.postgresql.org/pub/repos/apt/ xenial-pgdg main. After that I've uninstalled 9.6.
Now, though `psql` says in help that it's going to connect to 5433 port by default, it's connecting to 5432. So I have to explicitly set a `-p 5433` option.
Probably somewhere in your environment is setting export PGPORT=5433.