Getting error "You've tried to invoke Spring when it's already loaded" when I try start server

I managed to solve the problem. When I removed the spring gem and tried to start my rails server I got the following message:

/Users/emmetgibney/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/bootsnap-1.4.6/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:23:in `require': dlopen(/Users/emmetgibney/.rbenv/versions/2.7.0/lib/ruby/gems/2.7.0/gems/pg-1.2.3/lib/pg_ext.bundle, 9): Library not loaded: /usr/local/opt/openssl/lib/libssl.1.0.0.dylib (LoadError)

This made me think it could be a problem with postgres, so I uninstalled and reinstalled postgres using brew, and that seems to have resolved it. I can now start my rails server for this app, and all my other apps as well.

I hadn't done involving postgres since installing it WAY back when, so I have no idea how postgres got messed up in the first place, but it works now nonetheless.

In my case it was due to postgres gem in my Gemfile. I was using sqlite3 on my development server and postgres on production (Heroku). So pg gem was without a group wrapper.

I solved it by wrapping postgres with a production group wrapper like so:

group :production do
  gem 'pg'
end

I had the same issue. My problem was I had Postgres installed with homebrew, and then I had Postgres.app installed as well. The Postgres.app version was the one I was running, and the one that would start when I typed psql into terminal, but rbenv could not access it.

I was able to follow the steps here.

First make sure you have your $PATH variable set up correctly. If you don't, run

sudo mkdir -p /etc/paths.d &&
echo /Applications/Postgres.app/Contents/Versions/latest/bin | sudo tee /etc/paths.d/postgresapp

and then restart your terminal.

After you have confirmed that or run the command to update it, run

sudo ARCHFLAGS="-arch x86_64" gem install pg

and you should be good to go. Just make sure your config/database.yaml is setup properly, something like;

development:
  adapter: postgresql
  database: [YOUR_DATABASE_NAME]
  host: localhost

And to finally run rails db:migrate and rails db:setup to set up the database and rails server to start the server, hopefully without issue.

This happened to me after creating a new rails app with Postgres, running a local server (which worked), upgrading from Ruby 2.7.0 > 2.7.2, bundling, and trying to run the server again.

I was getting this error over and over (even after running the binstub command):

You've tried to invoke Spring when it's already loaded ...

This soloved my issue

1. Delete the .bundle folder
2. clean bundle install

I have faced this exact situation 30 minutes ago. I'm using ArchLinux. I do have the latest Ruby from the ArchLinux community. But the project I'm working on uses Ruby 2.7, and I'm using RVM for that.

Today suddenly I saw rails s isn't working. I quickly ran bundle exec spring binstub --all, but I got:

* bin/rake: Spring already present
* bin/rails: Spring already present

So I read the package update log (/var/log/pacman.log), and I got this:

[2021-10-20T12:33:44+0530] [ALPM] upgraded libffi (3.3-4 -> 3.4.2-4)
[2021-10-20T12:33:44+0530] [ALPM] upgraded glib2 (2.70.0-1 -> 2.70.0-2)
[2021-10-20T12:33:44+0530] [ALPM] upgraded gobject-introspection-runtime (1.70.0-1 -> 1.70.0-2)
[2021-10-20T12:33:44+0530] [ALPM] upgraded gjs (2:1.68.3-1 -> 2:1.68.3-2)
[2021-10-20T12:33:45+0530] [ALPM] upgraded python (3.9.7-1 -> 3.9.7-2)
[2021-10-20T12:33:45+0530] [ALPM] upgraded gobject-introspection (1.70.0-1 -> 1.70.0-2)
[2021-10-20T12:33:45+0530] [ALPM] upgraded guile (2.2.7-1 -> 2.2.7-2)
[2021-10-20T12:33:45+0530] [ALPM] upgraded libp11-kit (0.24.0-1 -> 0.24.0-2)
[2021-10-20T12:33:45+0530] [ALPM] upgraded p11-kit (0.24.0-1 -> 0.24.0-2)
[2021-10-20T12:33:45+0530] [ALPM] upgraded libfilezilla (0.34.0-1 -> 0.34.1-1)
[2021-10-20T12:33:45+0530] [ALPM] upgraded llvm-libs (12.0.1-4 -> 12.0.1-5)
[2021-10-20T12:33:46+0530] [ALPM] upgraded llvm (12.0.1-4 -> 12.0.1-5)
[2021-10-20T12:33:46+0530] [ALPM] upgraded ocaml-ctypes (0.17.1-6 -> 0.17.1-8)
[2021-10-20T12:33:46+0530] [ALPM] upgraded llvm-ocaml (12.0.1-4 -> 12.0.1-5)
[2021-10-20T12:33:46+0530] [ALPM] upgraded mpg123 (1.29.0-1 -> 1.29.1-1)
[2021-10-20T12:33:46+0530] [ALPM] upgraded python-cffi (1.14.6-1 -> 1.14.6-2)
[2021-10-20T12:33:46+0530] [ALPM] upgraded python-gobject (3.40.1-1 -> 3.40.1-2)
[2021-10-20T12:33:47+0530] [ALPM] upgraded python2 (2.7.18-4 -> 2.7.18-5)
[2021-10-20T12:33:47+0530] [ALPM] upgraded wayland (1.19.0-1 -> 1.19.0-2)
[2021-10-20T12:33:47+0530] [ALPM] upgraded qt5-base (5.15.2+kde+r243-1 -> 5.15.2+kde+r247-1)
[2021-10-20T12:33:48+0530] [ALPM] upgraded qscintilla-qt5 (2.13.0-1 -> 2.13.1-1)
[2021-10-20T12:33:48+0530] [ALPM] upgraded ruby (3.0.2-1 -> 3.0.2-2)
[2021-10-20T12:33:49+0530] [ALPM] upgraded ruby-docs (3.0.2-1 -> 3.0.2-2)

As you can see there's a libffi update and the Archlinux community built Ruby, Python, LLVM and even Glibc on the new libffi. So, for RVM ruby's ffi gem, it was a soname bump.

So I downgraded libffi and it's working. But this might break the system when you reboot it because glibc is built against the new libffi. So I have to keep latest libffi and rebuild the ffi gem that the bundler specifies. So this will solve the issue:

$ gem uninstall ffi -aI

# If you have Gemfile
$ bundle install

# If you don't have Gemfile
$ gem install ffi

So libffi bump was a different reason for the problem. And rebuilding FFI native extension will fix this.

I ran into the same problem after upgrading from Ubuntu 18.04 to 20.04. The solution in Ruby Forum DID NOT WORK for me with Ruby 2.7.0 and Rails 6.0.3.2

However this How to get FFI working on Ruby 2.7.2 image worked for me.

Basically, this works if it was an upgraded

sudo ln -s /usr/lib/x86_64-linux-gnu/libffi.so.7 /usr/lib/x86_64-linux-gnu/libffi.so.6

i removed 'spring' gem, then it worked

Do the following steps:

1. Remove Spring gem from gemfile.
2. bundle install
3. Delete Vendor file from project.
4. bundle install.
5. then rails s.

bundle pristine or gem pristine --all worked for me.

Maybe regenerate your gemspecs try running ...

gem pristine --all
bundle install
bundle exec spring binstub --all

I had the same after updating my app to rails 6.1.4.1.

1. Delete Gemfile.lock
2. bundle install