Postgres is failing with 'could not open relation mapping file “global/pg_filenode.map” '

Question

I\'m having an issue with my install of postgres in my development environment and I need some help diagnosing it. I haven\'t yet had any luck in tracking down a solution.

Answer 1

ps aux | grep postgres revealed I had another instance of postgres running on a temp data directory from a previous test run. Killing this process fixed the problem.