Can not start redmine 6.0.1 server

I followed the installation tutorial and deployed on CentOS, and no errors were reported in the previous steps.
But after execute this command bundle exec rails server -e production , redmine did not start.

This is the information returned by the terminal:

WARN: Unresolved or ambiguous specs during Gem::Specification.reset:
      stringio (>= 0)
      Available/installed versions of this gem:
      - 3.1.2
      - 3.1.0
WARN: Clearing out unresolved specs. Try 'gem cleanup <gem>'
Please report a bug if this causes problems.
WARN: Unresolved or ambiguous specs during Gem::Specification.reset:
      stringio (>= 0)
      Available/installed versions of this gem:
      - 3.1.2
      - 3.1.0
WARN: Clearing out unresolved specs. Try 'gem cleanup <gem>'
Please report a bug if this causes problems.
/usr/local/lib/ruby/gems/3.3.0/gems/zeitwerk-2.7.1/lib/zeitwerk/core_ext/kernel.rb:34: warning: webrick was loaded from the standard library, but is not part of the default gems since Ruby 3.0.0. Add webrick to your Gemfile or gemspec. Also contact author of zeitwerk-2.7.1 to add webrick into its gemspec.
Could not find a server gem. Maybe you need to add one to the Gemfile?

  gem "puma" 

Run `bin/rails server --help` for more options.

this is my env infomation:

ruby -v
ruby 3.3.0 (2023-12-25 revision 5124f9ac75) [x86_64-linux]

gem -v
3.5.3

Replies (3)

RE: Can not start redmine 6.0.1 server - Added by Cloud S3n 6 days ago

What's more:

rails --version
WARN: Unresolved or ambiguous specs during Gem::Specification.reset:
      stringio (>= 0)
      Available/installed versions of this gem:
      - 3.1.2
      - 3.1.0
WARN: Clearing out unresolved specs. Try 'gem cleanup <gem>'
Please report a bug if this causes problems.
Rails 7.2.2

System: Linux version 3.10.0-1160.119.1.el7.x86_64 (mockbuild@kbuilder.bsys.centos.org) (gcc version 4.8.5 20150623 (Red Hat 4.8.5-44) (GCC) )

DB: Mysql5.7

RE: Can not start redmine 6.0.1 server - Added by Bernhard Rohloff 5 days ago

Based on the error message from your first post I assume there's no webserver gem (webrick, or puma) installed. It's not installed by default. What you can do is to create a textfile Gemfile.local next to the Gemfile of Redmine and put gem 'puma' in it. Then run bundle install again.

RE: Can not start redmine 6.0.1 server - Added by Cloud S3n 5 days ago

Thank you for the help! I followed your suggestion, added gem 'puma' to the Gemfile.local , and ran bundle install . The issue is now resolved! Your guidance saved me a lot of time—really appreciate it!

Additionally, for newcomers deploying Redmine for the first time, it might not be obvious that puma needs to be installed manually. I think it would be helpful to add this step to the installation guide.

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