From: Dave Thomas <dave@...>
Date: 2003-05-03T04:54:40+09:00
Subject: Re: Ruby (1.6.7) Net::FTP/OS call hang

Sean Gilbertson wrote:

>     I think Ruby is a great language, and I would love to use it, but 
> for one problem.  I am creating an FTP program to hone my Ruby skills, 
> using RubyCocoa as a platform.  Everything is working well so far, 
> except when I connect to an FTP server, all the threads hang.  I 
> remember reading in the book that this is something to be expected in 
> Ruby, as OS calls like this hang all threads when they dont return 
> immediately.  Obviously this is going to be a huge problem, as all the 
> benefits of multithreading are moot, when most of my threads will be 
> doing FTP transactions.  My question is: Have and subsequent versions of 
> Ruby remedied this problem?  I understand it is a symptom of how Ruby 
> works, but knowing that does not help me.  I have looked for changelogs 
> and such, with no luck so far.

You're probably hanging doing the DNS lookup. Perhaps using the thread 
aware resolv.rb library might help.

Cheers


Dave