【发布时间】：2021-02-08 16:19:20
【问题描述】：
所以从 ruby 2.4.6 到 ruby 2.7.2 和 rails 4.2.8 到 rails 5，我升级了我的应用程序并在本地对其进行了测试，现在我尝试部署到 heroku，Web 服务器一完成就崩溃了部署。
网络服务器日志有以下内容：
2020-10-26T11:37:57.946836+00:00 app[web.1]: /app/vendor/bundle/ruby/2.7.0/gems/puma-5.0.2/lib/puma/configuration.rb:256:in `app'
2020-10-26T11:37:57.946836+00:00 app[web.1]: /app/vendor/bundle/ruby/2.7.0/gems/puma-5.0.2/lib/puma/runner.rb:131:in `load_and_bind'
2020-10-26T11:37:57.946836+00:00 app[web.1]: /app/vendor/bundle/ruby/2.7.0/gems/puma-5.0.2/lib/puma/cluster.rb:501:in `run'
2020-10-26T11:37:57.946837+00:00 app[web.1]: /app/vendor/bundle/ruby/2.7.0/gems/puma-5.0.2/lib/puma/launcher.rb:171:in `run'
2020-10-26T11:37:57.946837+00:00 app[web.1]: /app/vendor/bundle/ruby/2.7.0/gems/puma-5.0.2/lib/puma/cli.rb:80:in `run'
2020-10-26T11:37:57.946837+00:00 app[web.1]: /app/vendor/bundle/ruby/2.7.0/gems/puma-5.0.2/bin/puma:10:in `<top (required)>'
2020-10-26T11:37:57.946837+00:00 app[web.1]: /app/vendor/bundle/ruby/2.7.0/bin/puma:23:in `load'
2020-10-26T11:37:57.946837+00:00 app[web.1]: /app/vendor/bundle/ruby/2.7.0/bin/puma:23:in `<top (required)>'
2020-10-26T11:37:58.074574+00:00 heroku[web.1]: Process exited with status 1
2020-10-26T11:37:58.109882+00:00 heroku[web.1]: State changed from starting to crashed
构建日志有以下内容
-----> Detecting rails configuration
###### WARNING:
Your app was upgraded to bundler 2.1.4.
Previously you had a successful deploy with bundler 1.17.3.
If you see problems related to the bundler version please refer to:
https://devcenter.heroku.com/articles/bundler-version#known-upgrade-issues
###### WARNING:
Detecting rails configuration failed
set HEROKU_DEBUG_RAILS_RUNNER=1 to debug
-----> Discovering process types
Procfile declares types -> release, web, worker
Default types for buildpack -> console, rake
-----> Compressing...
Done: 387.5M
-----> Launching...
罪魁祸首可能是什么？
【问题讨论】：
-
set HEROKU_DEBUG_RAILS_RUNNER=1 to debug使用该值添加该环境变量并再次为构建过程加注星标。同时分享您的Gemfile以及任何其他相关的 ruby 文件。
标签： ruby-on-rails ruby heroku rubygems