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Bug #22286 ยป tcpserver-close-bug.rb

docelic (Davor Ocelic), 09/02/2026 08:55 AM

 
require 'socket'
mode= ARGV[0]
fds= ->{ Dir.children('/proc/self/fd').size }
stats= Hash.new(0); n= 300; fd0= fds.()
n.times do
l= TCPServer.new '127.0.0.1', 0
socks= []
th= Thread.new { begin; loop { s= l.accept; socks<< s }; rescue IOError, SystemCallError; end }
c= TCPSocket.new '127.0.0.1', l.addr[1]
case mode
when 'shutdown-join-close' then (l.shutdown rescue nil); th.join; l.close
when 'shutdown' then (l.shutdown rescue nil); l.close; th.join
else l.close; th.join
end
socks.each(&:close)
r= IO.select [c], nil, nil, 0.5
stats[[r ? :ok : :hang, socks.empty? ? :not_accepted : :accepted]]+= 1
c.close
end
GC.start
puts "#{mode}: #{stats.inspect} fd delta after GC: #{fds.()- fd0}"
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