Issue #21104 has been updated by chokkoy (Naoyuki Yamada).
For those experiencing this problem, can you successfully run the following script?
``` ➜ ruby-sandbox ruby -v ruby 3.4.2 (2025-02-15 revision d2930f8e7a) +PRISM [arm64-darwin24] ➜ ruby-sandbox cat socket_test.rb require "socket" s = Socket.tcp("example.com", 80) s.write "GET / HTTP/1.1\r\nHost: example.com\r\nConnection: close\r\n\r\n" puts s.gets(nil) s.close ➜ ruby-sandbox ruby socket_test.rb socket_test.rb:4:in 'IO#gets': Connection reset by peer (Errno::ECONNRESET) from socket_test.rb:4:in '<main>' ```
Additionally, could you provide the OS versions of both machines?
- MacOS 15.3.2 ( no issue in MacOS 13.6.2 which is another machine)
And could you provide the output of sudo pfctl -s all ?
``` ➜ ruby-sandbox sudo pfctl -s all Password: No ALTQ support in kernel ALTQ related functions disabled TRANSLATION RULES: nat-anchor "com.apple/*" all rdr-anchor "com.apple/*" all FILTER RULES: scrub-anchor "com.apple/*" all fragment reassemble anchor "com.apple/*" all DUMMYNET RULES: dummynet-anchor "com.apple/*" all INFO: Status: Disabled Debug: Urgent State Table Total Rate current entries 0 searches 0 0.0/s inserts 0 0.0/s removals 0 0.0/s Counters match 0 0.0/s bad-offset 0 0.0/s fragment 0 0.0/s short 0 0.0/s normalize 0 0.0/s memory 0 0.0/s bad-timestamp 0 0.0/s congestion 0 0.0/s ip-option 0 0.0/s proto-cksum 0 0.0/s state-mismatch 0 0.0/s state-insert 0 0.0/s state-limit 0 0.0/s src-limit 0 0.0/s synproxy 0 0.0/s dummynet 0 0.0/s invalid-port 0 0.0/s TIMEOUTS: tcp.first 120s tcp.opening 30s tcp.established 86400s tcp.closing 900s tcp.finwait 45s tcp.closed 90s tcp.tsdiff 30s udp.first 60s udp.single 30s udp.multiple 60s icmp.first 20s icmp.error 10s grev1.first 120s grev1.initiating 30s grev1.estblished 1800s esp.first 120s esp.estblished 900s other.first 60s other.single 30s other.multiple 60s frag 30s interval 10s adaptive.start 6000 states adaptive.end 12000 states src.track 0s LIMITS: states hard limit 10000 app-states hard limit 10000 src-nodes hard limit 10000 frags hard limit 5000 tables hard limit 1000 table-entries hard limit 200000 OS FINGERPRINTS: 696 fingerprints loaded ```
One more request, but if possible, could you try booting the Mac where the issue occurs in Safe Mode and check whether the script that triggers the issue runs successfully?
When safemode, output of the script was the same(not changed, failed). I hope it helps. ---------------------------------------- Bug #21104: Net::HTTP connections failing in Ruby >= 3.4.0 on macOS with Happy Eyeballs enabled https://bugs.ruby-lang.org/issues/21104#change-112628 * Author: mjt58 (Mike Thompson) * Status: Open * ruby -v: ruby 3.4.1 (2024-12-25 revision 48d4efcb85) +PRISM [arm64-darwin24] * Backport: 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN ---------------------------------------- A project I work on recently upgraded Ruby to 3.4.1 from 3.3.5. Following the upgrade, and when running locally on my Mac, all attempts to connect to an external service within the project over http(s) fail. We use `mise` for managing development tool dependencies, including Ruby, and I am using macOS 15.3. For example running something as simple as: ``` require 'net/http' puts Net::HTTP.get(URI('https://bbc.co.uk')) ``` Will fail with the following stack trace: ``` /path/to/.local/share/mise/installs/ruby/3.4.1/lib/ruby/3.4.0/net/protocol.rb:46:in 'OpenSSL::SSL::SSLSocket#connect_nonblock': Connection reset by peer - SSL_connect (Errno::ECONNRESET) from /path/to/.local/share/mise/installs/ruby/3.4.1/lib/ruby/3.4.0/net/protocol.rb:46:in 'Net::Protocol#ssl_socket_connect' from /path/to/.local/share/mise/installs/ruby/3.4.1/lib/ruby/3.4.0/net/http.rb:1736:in 'Net::HTTP#connect' from /path/to/.local/share/mise/installs/ruby/3.4.1/lib/ruby/3.4.0/net/http.rb:1636:in 'Net::HTTP#do_start' from /path/to/.local/share/mise/installs/ruby/3.4.1/lib/ruby/3.4.0/net/http.rb:1625:in 'Net::HTTP#start' from /path/to/.local/share/mise/installs/ruby/3.4.1/lib/ruby/3.4.0/net/http.rb:1064:in 'Net::HTTP.start' from /path/to/.local/share/mise/installs/ruby/3.4.1/lib/ruby/3.4.0/net/http.rb:824:in 'Net::HTTP.get_response' from /path/to/.local/share/mise/installs/ruby/3.4.1/lib/ruby/3.4.0/net/http.rb:805:in 'Net::HTTP.get' from request.rb:2:in '<main>' ``` I tried different versions of Ruby and confirmed that the issue appears with 3.4.0. After reading the release notes for this version, I tried setting `RUBY_TCP_NO_FAST_FALLBACK=1` and this worked, allowing me to work around the problem. This issue has also been encountered by others, please see: https://github.com/rubygems/rubygems/issues/8390 -- https://bugs.ruby-lang.org/