Dears good evening, Hope you are doing great !! I am trying to upgrade Discourse on my self hosted instance but get the following error message: ******************************************************** *** Please be patient, next steps might take a while *** ******************************************************** ABORTING, you do not have enough Unicorn workers running Docker Manager: FAILED TO UPGRADE # /var/www/discourse/plugins/docker_manager/lib/docker_manager/upgrader.rb:41:in `upgrade' /var/www/discourse/plugins/docker_manager/scripts/docker_manager_upgrade.rb:19:in `block in ' /var/www/discourse/plugins/docker_manager/scripts/docker_manager_upgrade.rb:6:in `fork' /var/www/discourse/plugins/docker_manager/scripts/docker_manager_upgrade.rb:6:in ` ' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/railties-8.0.4/lib/rails/commands/runner/runner_command.rb:44:in `load' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/railties-8.0.4/lib/rails/commands/runner/runner_command.rb:44:in `block in perform' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/activesupport-8.0.4/lib/active_support/execution_wrapper.rb:91:in `wrap' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/railties-8.0.4/lib/rails/commands/runner/runner_command.rb:70:in `conditional_executor' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/railties-8.0.4/lib/rails/commands/runner/runner_command.rb:43:in `perform' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/thor-1.4.0/lib/thor/command.rb:28:in `run' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/thor-1.4.0/lib/thor/invocation.rb:127:in `invoke_command' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/railties-8.0.4/lib/rails/command/base.rb:178:in `invoke_command' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/thor-1.4.0/lib/thor.rb:538:in `dispatch' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/railties-8.0.4/lib/rails/command/base.rb:73:in `perform' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/railties-8.0.4/lib/rails/command.rb:65:in `block in invoke' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/railties-8.0.4/lib/rails/command.rb:143:in `with_argv' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/railties-8.0.4/lib/rails/command.rb:63:in `invoke' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/railties-8.0.4/lib/rails/commands.rb:18:in ` ' /usr/local/lib/ruby/3.3.0/bundled_gems.rb:69:in `require' /usr/local/lib/ruby/3.3.0/bundled_gems.rb:69:in `block (2 levels) in replace_require' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/bootsnap-1.19.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:30:in `require' bin/rails:18:in ` ' Could anyone help me troubleshooting this error so I can upgrade my instance ? I am currently running on 2025.12.0-latest Thank you all for your help and support, Cheers BR Terenui

After You’ve ssh’d into your server, Usually it is cd /var/discourse ./launcher rebuild app

Did you try rebuilding from command line?

[image] itsbhanusharma: Did you try rebuilding from command line? Nope but I can try, what would be the command line I should use exactly ? Ideally to upgrade everything ? I am rather new on Discourse and sometimes confused with all the commands (e.g. rebuild, rake etc…) :smiley:

Thank you so much, it worked :wink:

Upgrade abort - not enough Unicorn workers running

Product Support Self-hosting

m_terenui (Terenui) January 8, 2026, 8:33pm 5

Thank you so much, it worked

Topic		Replies	Views
Sorry, there was an error upgrading Discourse Product Support	2	627	November 26, 2022
Browser upgrade fails when discourse is configured to use one unicorn worker Bug	5	550	October 18, 2023
"Waiting for unicorn to reload", then update stops Product Support	30	5160	June 20, 2021
Sorry, there was an error updating Discourse. Please check the logs below: Docker Manager: FAILED TO UPGRADE Self-hosting	1	299	May 18, 2024
Failed upgrade from 2.9.0.beta14 to 3.1.0.beta Self-hosting	10	1374	January 25, 2023

Upgrade abort - not enough Unicorn workers running

Related topics