Ruby Net: :Opentimeout: Execution Expired
I'm Consistently Getting This Error on Several Hosts on My Machine, E. G. : Require 'Open-Uri' Open('). Read Net: :Opentimeout: Execution Expired from...
I'm consistently getting this error on several hosts on my machine, e.g.:
require 'open-uri'
open(').read
Net::OpenTimeout: execution expired
from /usr/local/opt/rbenv/versions/2.4.0/lib/ruby/2.4.0/net/http.rb:904:in `initialize'
from /usr/local/opt/rbenv/versions/2.4.0/lib/ruby/2.4.0/net/http.rb:904:in `open'
from /usr/local/opt/rbenv/versions/2.4.0/lib/ruby/2.4.0/net/http.rb:904:in `block in connect'
from /usr/local/opt/rbenv/versions/2.4.0/lib/ruby/2.4.0/timeout.rb:103:in `timeout'
from /usr/local/opt/rbenv/versions/2.4.0/lib/ruby/2.4.0/net/http.rb:902:in `connect'
from /usr/local/opt/rbenv/versions/2.4.0/lib/ruby/2.4.0/net/http.rb:887:in `do_start'
from /usr/local/opt/rbenv/versions/2.4.0/lib/ruby/2.4.0/net/http.rb:876:in `start'
from /usr/local/opt/rbenv/versions/2.4.0/lib/ruby/2.4.0/open-uri.rb:323:in `open_http'
from /usr/local/opt/rbenv/versions/2.4.0/lib/ruby/2.4.0/open-uri.rb:741:in `buffer_open'
from /usr/local/opt/rbenv/versions/2.4.0/lib/ruby/2.4.0/open-uri.rb:212:in `block in open_loop'
from /usr/local/opt/rbenv/versions/2.4.0/lib/ruby/2.4.0/open-uri.rb:210:in `catch'
from /usr/local/opt/rbenv/versions/2.4.0/lib/ruby/2.4.0/open-uri.rb:210:in `open_loop'
from /usr/local/opt/rbenv/versions/2.4.0/lib/ruby/2.4.0/open-uri.rb:151:in `open_uri'
from /usr/local/opt/rbenv/versions/2.4.0/lib/ruby/2.4.0/open-uri.rb:721:in `open'
from /usr/local/opt/rbenv/versions/2.4.0/lib/ruby/2.4.0/open-uri.rb:35:in `open'
from (irb):3
from /usr/local/opt/rbenv/versions/2.4.0/bin/irb:11:in `<main>'
Doesn't happen on others such as
open(').read
Ruby 2.4.0 from rbenv and macOS 10.12.3. Tested also with Ruby 2.0.0 - the system version on macOS.
I get no error, and expected results when I curl or use Node's request. So this is not a blocked host, and my IP isn't blocked either.
Tried to reinstall Ruby, restart machine, and issue still occurs.
Any pointers?
3 Answers
Looks like it's a an issue with how Ruby resolves DNS.
Added require 'resolv-replace' and now it's opening connections immediately.
Sources:
I've hit another reason for this issue. Had a network where IPv6 is announced as routable but is not. That lead to IPv6 trying to be used resulting in the error.
So I had to disable IPv6.
For Red Hat Enterprise Linux 7:
# cat /etc/sysctl.d/10-ipv6.conf
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
# sysctl -p
The require 'resolv-replace' also helped but my guess is that it just resolved to IPv4 instead so I don't want to limit app in such a way.
I received error from rails application in docker container, and restarting docker service solved the problem:
sudo service docker start
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