[RUBY] 500 Internal Server Error occurs in Rails production environment

** Introduction ** I was messed up with a 500 Internal Server Error while creating a portfolio in Rails and would like to share with you how to solve the problem.

environment

Conclusion

Maybe due to the asset pipeline

Status

I've been developing in the development environment for a long time, and the application has been completed to some extent, so when I tried to deploy it in the production environment in the production environment, I got ** 500 Internal Server Error ** and could not solve it for 3 days. ..

What I did to solve the problem

--Changing the settings of the conf file of the web server (Nginx)
=> Not resolved --Around the socket such as deleting the puma socket
=> Not resolved --Review of other parts that may be related such as database.yml and Gemfile
=> Not resolved --Check the contents of production.log
=> Check for errors around the asset pipeline

The solution procedure I did

--First clean the asset pipeline with rake assets: clobber --bundle exec rake assets: precompile RAILS_ENV = production to precompile the asset pipeline
=> In my case, I was asked to install yarn, so install it. ――It started up well after restarting
=> In my case here was also done.

At the end

At first I decided it was a problem around the web server, but I should have looked at production.log from the beginning to see the error. It was a very educational error resolution.

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