pg.rb segmentation fault [Mojave upgrade]

Question

Segmentation fault in pg.rb:56

versions: rails: 5.2.0, ruby: 2.4.4, pg gem: 0.20.0

After upgrading to Mac OS mojave i have encountered problems with my local hos

Answer 1

in .env file set WEB_CONCURRENCY=0 and you do not need to add any logic in config/puma.rb

Answer 2

As this issue is only occuring in the development environment, I made it conditional. This solution in puma.rb works for me until the bug gets fixed.

workers ENV.fetch("WEB_CONCURRENCY") { 2 } unless Rails.env.development?

Answer 3

I had a similar issue, in which my test environment was often crashing in Ruby 2.6.3 with Segmnentation Fault lib/pg.rb line 56.

What worked for me was setting pumb.rb to have zero workers in the test environment:

# config/puma.rb
(ENV.fetch("RAILS_ENV") == 'test') ? (workers 0) : (workers ENV.fetch("WEB_CONCURRENCY") { 2 })