![]() And it goes unreported most of the time, because it's very random and pretty much unreproducible since it's hard to actually pin it down to IPv6 being the culprit. There are tons of reports still popping up. There's also a huge thread here: aws-amplify/amplify-js#5539 about an Android only issue that I was also running into, and which was specifically about Happy Eyeballs.Īdditionally, there are many other threads in other JS ecosystems related to Happy Eyeballs: facebook/react-native#29608 (comment) Reddit has recently disabled IPv6 due to issues they were having:Īlso their Android app does not implement Happy Eyeballs, and here's a report specifically pinpointing this to be the problem: Even if 1% of users are affected, depending on the number of users, that can add up quite a bit. I'm not familiar at all with nodejs networking internals.Īs of 2017, IPv6 brokenness is now generally regarded as a non-problem. Since it deals with SYN packets, I'm not sure if this can be implemented in JS land or it needs to touch the C++ networking layer. The first address to reply with a SYN-ACK wins the race, we then cancel the other TCP connection attempts.Roughly speaking, we start the second address around the same time we send out a SYN retransmission Once the list is sorted, we send out the SYN for the first address and start timers based on average and variance of the.Other, we use RFC3484 to pick the best one. That have lower latency - but has a 25ms leeway: if the historical RTT of two compared address are within 25ms of each This algorithm uses historical RTT data to prefer addresses We perform our own address selection algorithm to sort them. When we have a list of IP addresses (either from the DNS cache or by receiving them close together with v4 before v6),.If we get the AAAA during that 25ms window, we move on to address selection.If the timer fires, we send out the v4 SYN.msg361241 - Author: Ido Michael (Ido Michael) Date: 15:09 Created PR added arguments to method signature in doc. Updating the method signature is a big step anyway. If the first reply we get is A and we're expecting a AAAA, we start a 25ms timer Ideally, a small chapter with a description of Happy Eyeballs algorithm would be nice to have but I don't insist.If the first reply we get is AAAA, we send out the v6 SYN immediately. ![]() If the DNS records are not in the cache, the requests are sent back to back on the wire, AAAA first. The updated implementation performs the following: There's a writeup on how this is implemented in OSX here by an Apple engineer: There is an user-land patch here: by which might help as a workaround. What is the feature you are proposing to solve the problem? Restarting the router resolves the issue. I have noticed that Node 17 will then pretty much hang on outgoing connections for up to one minute before eventually being able to connect. More on this here: square/okhttp#6954 (comment) The problem is that consumer routers sometimes glitch out on IPv6.Ī router I manage in one particular location, which is a consumer grade TP-Link router, will routinely hang on IPv6 connections about once per month, until it is restarted. In particular, there are a lot of data points related to similar support lacking from the OkHttp library which is used heavily on Android and results in connectivity issues for a relatively big number of users. The lack of Happy Eyeballs support can result in connections failing. It appears that node 17 has merged this PR: #39987 which may result in IPv6 addresses being sorted first.Īs per an answer in this reddit thread from it appears that Happy Eyeballs is not implemented however. What is the problem this feature will solve?
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |