From: Marc Soda <marcantoniosr@...>
Date: 2007-01-23T00:53:58+09:00
Subject: Socket issue

Hey all,

While testing some edge cases in an app I came across a strange socket
issue.  If I have a server that dies unexpectedly, and then try to
write to it from an already connected client, it doesn't raise an
exception until the next time I try to write it.

Example:

Server
---------
require 'socket'

include Socket::Constants

sock = Socket.new(AF_INET, SOCK_STREAM, 0)
sock.setsockopt(SOL_SOCKET, SO_REUSEADDR, true)
sockaddr = Socket.pack_sockaddr_in(7000, 'localhost')
sock.bind(sockaddr)
sock.listen(0)

client, client_sockaddr = sock.accept
print "Connected\n"
print ">>> #{client.readline}"
abort



Client
--------
require 'socket'
include Socket::Constants

$sock = Socket.new(AF_INET, SOCK_STREAM, 0)
sockaddr = Socket.pack_sockaddr_in(7000, 'localhost')
$sock.connect(sockaddr)

def send_msg
  begin
    $sock.write("Hello\n")
  rescue StandardError => err
    p err
  end
end

puts "1"
send_msg
sleep 0.5
puts "2"
send_msg   # Should error here.
sleep 0.5
puts "3"
send_msg

Any suggestions?  I'm running on Linux, BTW.

Thanks,
Marc