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PG ConnectionBad (could not connect to server No such file or directory)

 1 year ago
source link: https://fuzzyblog.io/blog/postgres/2020/04/08/pg-connectionbad-could-not-connect-to-server-no-such-file-or-directory.html
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PG ConnectionBad (could not connect to server No such file or directory)

Apr 8, 2020

IMG_2993.jpeg

I've recently had the situation where my personal development box (OSX Mojave, Rails, Postgres) has become unstable with, at times, multiple crashes per day. I logged in this morning and found myself getting errors like this:

PG::ConnectionBad (could not connect to server: No such file or directory)

I did some digging and even though Postgres appeared to be running to brew, it was a false positive due to a leftover postmaster.pd file. Here was the fix:

  1. First make sure that postgres isn't running use ps i.e. **ps auwwx grep post**.
  2. Delete the file: /usr/local/var/postgres/postmaster.pid i.e. rm /usr/local/var/postgres/postmaster.pid
  3. At this point brew will, foolishly and oddly, still think Postgres is running so do do a brew restart postgres

Here's a handy Stack Overflow reference.

Note: Make absolutely sure that postgres is NOT running before you delete postmaster.pid or you risk serious database corruption / data loss.


Posted In: #postgres


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