From: mathew murphy <meta@...>
Date: 2011-05-13T06:44:40+09:00
Subject: [ruby-core:36153] [Ruby 1.9 - Bug #4681][Open] Timeout.timeout doesn't actually time out?


Issue #4681 has been reported by mathew murphy.

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Bug #4681: Timeout.timeout doesn't actually time out?
http://redmine.ruby-lang.org/issues/4681

Author: mathew murphy
Status: Open
Priority: Normal
Assignee: 
Category: 
Target version: 
ruby -v: 1.9.2p180


Documentation for Timeout says "A way of performing a potentially long-running operation in a thread, and terminating its execution if it hasn���t finished by a fixed amount of time."

This doesn't actually seem to be what it does.

Example code:

#!/usr/bin/ruby                                                                 
# encoding: UTF-8                                                               
                                                                                
require 'open3'                                                                 
require 'timeout'                                                               
                                                                                
puts "Time out after 2 seconds. Count them..."                                  
result = Timeout.timeout(2) do                                                  
  stdin, stdout, stderr = Open3.capture3("sleep 30")                            
  output = stdout.read + "\n" + stderr.read                                     
end                                                                             

On my systems, this doesn't time out after 2 seconds. Instead, it runs for 30 seconds, and then throws an error saying it took longer than 2 seconds.


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