From: brenton leanhardt <brenton.leanhardt@...>
Date: 2007-03-16T00:20:22+09:00
Subject: DRbServerNotFound on TupleSpace#take but not read

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I'm getting a DRbServerNotFound exception on TupleSpace#take but not
TupleSpace#read.  I'm running ruby 1.8.5 on fedora core 6.

Here's a little snippet:

@http_server.mount_proc('/delete') do |req, res|
  id = req.path_info.reverse.chop.reverse
  @seldom_space.read(['pending', nil, id, nil], 2)
  @seldom_space.take(['pending', nil, id, nil], 2)
  res.body = get_status
end

Basically @seldom_space is a TupleSpaceProxy that I'm accessing from within
a Webrick proc servlet.  The read will work as expected and return a
'pending' tuple with the specified id.  The take is throwing the following
exception:

[2007-03-15 11:06:13] ERROR DRb::DRbServerNotFound: DRb::DRbServerNotFound
        /usr/local/lib/ruby/1.8/drb/drb.rb:1650:in `current_server'
        /usr/local/lib/ruby/1.8/drb/drb.rb:1712:in `to_id'
        /usr/local/lib/ruby/1.8/drb/drb.rb:1048:in `initialize'
        /usr/local/lib/ruby/1.8/rinda/rinda.rb:229:in `new'
        /usr/local/lib/ruby/1.8/rinda/rinda.rb:229:in `take'
        ./bin/../lib/seldom.rb:134:in `run'
        /usr/local/lib/ruby/1.8/webrick/httpservlet/prochandler.rb:26:in
`call'
        /usr/local/lib/ruby/1.8/webrick/httpservlet/prochandler.rb:26:in
`do_GET'
        /usr/local/lib/ruby/1.8/webrick/httpservlet/abstract.rb:35:in
`__send__'
        /usr/local/lib/ruby/1.8/webrick/httpservlet/abstract.rb:35:in
`service'
        /usr/local/lib/ruby/1.8/webrick/httpserver.rb:104:in `service'
        /usr/local/lib/ruby/1.8/webrick/httpserver.rb:65:in `run'
        /usr/local/lib/ruby/1.8/webrick/server.rb:173:in `start_thread'
        /usr/local/lib/ruby/1.8/webrick/server.rb:162:in `start'
        /usr/local/lib/ruby/1.8/webrick/server.rb:162:in `start_thread'
        /usr/local/lib/ruby/1.8/webrick/server.rb:95:in `start'
        /usr/local/lib/ruby/1.8/webrick/server.rb:92:in `each'
        /usr/local/lib/ruby/1.8/webrick/server.rb:92:in `start'
        /usr/local/lib/ruby/1.8/webrick/server.rb:23:in `start'
        /usr/local/lib/ruby/1.8/webrick/server.rb:82:in `start'
        ./bin/../lib/seldom.rb:138:in `run'
        bin/seldom:31

Anyone have an idea what's going on?  I've been stepping through DRb with
ruby-debug for hours and I'm not able to wrap my mind around what's
happening (though I have learned a lot about more about DRb).

--Brenton

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