From: Clemens Wyss <clemens.wyss@...>
Date: 2009-05-18T14:39:01+09:00
Subject: Re: "Too many open files - socket(2)" when invoking Socket.new

Dear Sandor,
I don't see why your exception handling code should be of any help. The 
exception per se is the problem.

Why (on XP embedded only) do I get
  Too many open files - socket(2) (Errno::EMFILE)
on the line
 socket = Socket.new( AF_INET, SOCK_STREAM, 0 )
?
Also: opening the very same port with a simple VB App works, even on XP 
embedded...

Still any help/advice appreciated
Clemens

Sandor Szücs wrote:
> On 13.05.2009, at 16:41, Clemens Wyss wrote:
> 
>> Given the follwing code snippet:
>>
>>
>> require 'socket'
>> include Socket::Constants
> begin
>>
>> socket = Socket.new( AF_INET, SOCK_STREAM, 0 )
>> sockaddr = Socket.pack_sockaddr_in( 1313, 'localhost' )
>> socket.bind( sockaddr )
>> socket.listen( 5 )
>> client, client_sockaddr = socket.accept
>> client.puts "Hello from script one!"
>> puts "The client said, '#{client.readline.chomp}'"
>> client.puts "Hello from script one!"
> ensure
>>
>> socket.close
> end
> 
> 
> Try to add these statements in your code and reboot your box,
> then it should not happen.
> 
>> On my WinXP development machine this script runs as expected.  
>> Running it
>> on a WinXpEmbedded machine throws a
>>  Too many open files - socket(2) (Errno::EMFILE)
>> exception on the line
>>  socket = Socket.new( AF_INET, SOCK_STREAM, 0 )
>> What could cause this exception?
> 
> 
> Too many open files for your OS results in such an exception.
> 
> regards, Sandor 
> Sz�cs

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