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

[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

itsbhanusharma (Bhanu Sharma) January 8, 2026, 7:48pm 2

Did you try rebuilding from command line?

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Upgrade abort - not enough Unicorn workers running

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