From: Adam Beguelin <adam@...>
Date: 2005-10-14T02:16:15+09:00
Subject: Thread leak?

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The following code seems to leak threads.  Is there a better way to handle
timeouts so they don't leak threads?  I tested it on both windows and linux
and the results are the same.  

 

If you set t to nil in the rescue the result is the same.

 

      Adam

 

 

require 'timeout'

include ObjectSpace

 

begin

  execLine = "sleep 100"

  while true do

    t = Thread.new  {

      begin

        e = IO.popen(execLine)

        e.readlines

      ensure

        e.close if (e && !e.closed?)

      end

    }

    

    begin

      timeout(1) { t.join }

    rescue TimeoutError => e

      puts "timeout: "+e.to_s

      t.kill

    end

    c = 0

    ObjectSpace.garbage_collect

    ObjectSpace.each_object{|t| c += 1 if t.class == Thread}

    puts "num threads #{c}"

    break if c > 20

  end  

end


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