Rails one-click droplet unicorn is failing to find a gem; I can't tell if the right version of the gem is installed.

May 31, 2017 2.8k views
Ruby on Rails Ubuntu 16.04

My production app has been running for a while. Then yesterday I did a git pull that changed four files and my site stopped loading.

The culprit appears to be unicorn failing to run properly.

No matter what I do, unicorn endlessly crashes and respawns with the following error:

I, [2017-05-31T15:01:10.470158 #3601]  INFO -- : worker=0 spawning…
I, [2017-05-31T15:01:10.471573 #13738]  INFO -- : worker=0 spawned pid=13738
I, [2017-05-31T15:01:10.471847 #13738]  INFO -- : Refreshing Gem list
E, [2017-05-31T15:01:10.499302 #13738] ERROR -- : Could not find i18n-0.8.4 in any of the sources (Bundler::GemNotFound)
/usr/local/rvm/gems/ruby-2.4.0/gems/bundler-1.14.6/lib/bundler/spec_set.rb:87:in `block in materialize'

Yet running bundle install shows that i18n-0.8.4 is present in my installed gems list.

I’ve run down the rabbit hole trying to un/reinstall the gem. It always reports success with the correct version number.

But If I physically list the gems in my gem path, the directory is titled i18n-0.8.1.

After a successful uninstall, directory remains in place with the wrong version number. Same with after a reinstall reporting the correct number is installed.

In my attempts to flush the gemset with rvm, I’ve managed to break my rails user permissions to gem/bundle install install so that I now have to sudo to get them to run without permissions errors.

And still unicorn can’t find the right gem so my site refuses to load.

Can anyone help?

3 Answers


Try listing your gems:

gem query --local


ruby -e 'puts Gem::Specification.all_names'
  • Thanks for the reply!

    I did this, and the i18n gem is not in the list. Both commands give the same output; a drastically smaller list of gems than the bundle install output.

    I’m uncertain what this means or how to proceed.

    ‘Local’ implies that I have the gem source code locally and I need to download and install the i18n gem onsite now? Despite it being installed successfully without the –local flag? Despite not needing this before my last git pull?

    gem install –local i18n gives me:
    ERROR: Could not find a valid gem 'i18n' (>= 0) in any repository

    gem install i18n yields:
    Fetching: i18n-0.8.4.gem (100%)
    Successfully installed i18n-0.8.4
    1 gem installed

Same problem here. Have anyone found a solution to this?

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