Why puma workers constantly hung, and how we fixed by discovering the bug of Ruby v2.5.8 and v2.6.6

22-Apr-2021 1845
While running Rails puma servers in production, we were seeing the incident that some old worker processes suddenly got stuck regardless of no change in the amount or trend of requests.I found out the root cause and reported it to the upstream. This issue still exists in Ruby 2.6.0 and can be found as far back as Ruby 2.5.0. If you just want a summary of the bug, see ruby-lang.
Use coupon code:

RUBYONRAILS

to get 30% discount on our bundle!
Prepare for your next tech interview with our comprehensive collection of programming interview guides. Covering JavaScript, Ruby on Rails, React, and Python, these highly-rated books offer thousands of essential questions and answers to boost your interview success. Buy our 'Ultimate Job Interview Preparation eBook Bundle' featuring 2200+ questions across multiple languages. Ultimate Job Interview Preparation eBook Bundle