Unicorn stuck in loop: Refreshing Gem list

Question

I\'m using Rails 4.0.0, Ruby 2.3 and Unicorn.

My app was working perfectly until the day I tried to add a nem gem in my Gemfile. Everything\'s working like a charm l

Answer 1

Similar problem here. It happens when you change you Gemfile, using unicorn:reload doesn't run your new code.

Solved restarting unicorn instead of reloading it.

If you are using Capistrano, change the after deploy trigger from invoke 'unicorn:reload' to:

invoke 'unicorn:stop'
invoke 'unicorn:start'

According to https://github.com/tablexi/capistrano3-unicorn/issues/45 unicorn:restart is not working properly.

Answer 2

Our problem was that unicorn master process wasn't restarted correctly, because it was killed with:

/bin/kill -s HUP `cat tmp/pids/unicorn.pid`

Which doesn't actually kill the unicorn master process (only reloads the config, see SIGHUP documentation). Verify by running ps -ef | grep 'unicorn'.

Our problem was solved changing the killing of unicorn master process with:

/bin/kill `cat tmp/pids/unicorn.pid`

PS: cat tmp/pids/unicorn.pid just outputs the PID of the unicorn master process.