The Less-Told Story of Socket Timeouts

on YouTube ↗29m

" summary

Ruby 4.0 adds open_timeout to Socket.tcp/TCPSocket.new so a single timeout covers name resolution through connection, solving cases where resolv_timeout and connect_timeout alone couldn’t bound total time under Fast Fallback (Happy Eyeballs v2). The implementation required switching name resolution to interruptible threads after abandoning getaddrinfo_a (which caused fork hangs), rejecting combinations of open_timeout with other timeouts, and enables Net::HTTP to drop the Timeout library.

AI-written summary · about

" chapters (9)

1. 0:00Introduction to socket timeouts
2. 1:59Ruby 2.0 and early timeouts
3. 4:34Ruby 2.7 and name resolution timeout
4. 6:55Ruby 3.0 and getaddrinfo_a issues
5. 9:47Ruby 3.3 and interruptible resolution
6. 11:19Happy Eyeballs version 2
7. 18:20Ruby 4.0 and open_timeout
8. 27:08Net::HTTP timeout resolution
9. 28:15Conclusion and thanks

" related talks

• 26mTCP Sockets Programming in RubySebastian Sogamoso · WindyCityRails 2016
• 36mThe Little Server That CouldStella Cotton · RubyConf 2016
• 23mStatistically Optimal API TimeoutsDaniel Ackerman · RubyConf 2019
• 35mLet's build a simple HTTP server with RubyEsther Olatunde · RubyConf 2019
• 33mI Made a Slow Thing FastBen Hamill · LoneStarRuby Conf 2013
• 35mThe little server that couldStella Cotton · RubyConf AU 2017
• 30mOn Sockets and System Calls: Minimizing Context Switches for the Socket APIHerbert Bos, Tomas Hruby, Andrew S. Tanenbaum, Teodor Crivat · TRIOS ’14
• 44mOutside the Web Box: Using Ruby for Other ProtocolsDanielle Adams · RubyConf AU 2018