From: ptkwt@... (Phil Tomson)
Date: 2005-12-02T06:07:31+09:00
Subject: Re: DRb Crashing (on OS X Tiger)

In article <C30FFBD3-4115-47B1-B772-8BF5A73998C0@grayproductions.net>,
James Edward Gray II  <james@grayproductions.net> wrote:
>If I launch this server:
>
>#!/usr/local/bin/ruby
>
>require "drb"
>require "rinda/tuplespace"
>
>tuplespace = Rinda::TupleSpace.new
>DRb.start_service("druby://localhost:61676", tuplespace)
>
>loop do
>   nums    = Array.new(rand(9) + 2) { rand(10) + 1 }
>   ops     = Array.new(nums.size - 1) { %w{+ - * /}[rand(4)] }
>   problem = nums.zip(ops).flatten.compact.join(" ")
>
>   tuplespace.write(["Problem", problem])
>   puts tuplespace.take(["Result", String]).last
>end
>
>__END__
>
>Then run this client:
>
>#!/usr/local/bin/ruby -w
>
>require "drb"
>require "rinda/tuplespace"
>
>DRb.start_service
>tuplespace = Rinda::TupleSpaceProxy.new(
>   DRbObject.new_with_uri("druby://localhost:61676")
>)
>
>while problem = tuplespace.take(["Problem", %r{^\d+(?: [-+*/] \d+)+$}])
>   tuplespace.write(["Result", "#{problem.last} = #{eval  
>problem.last}"])
>end
>
>__END__
>
>The client crashes, generally within a few seconds.  Adding a sleep  
>inside the server loop seems to resolve the issue.
>
>Anyone know why?
>
>James Edward Gray II
>
>
>

Just wondering if you've gotten any resolution on this?  I'm seeing the same 
thing on Tiger both with your test code and my own DRb code.  While the same 
code runs fine for hours on Linux and FreeBSD.  It seems that DRb cannot be 
used reliably on OSX.  Anyone have any idea what might be going on?

Phil