From: han.holl@... (Han Holl)
Date: 2004-07-07T03:32:41+09:00
Subject: Druby and garbage collection

Hello,

I must be doing something quite wrong, but I'm stumped by this:

The server:

require 'drb'


class Server
  def pgproxy
    return DatabaseProxy.new
  end
end

class DatabaseProxy
  include DRbUndumped

  def exec(q, *methods)
      a = Array.new(10000)
      STDERR.puts "Created #{a.object_id}"; STDERR.flush
      ObjectSpace::define_finalizer(a, proc {|id|  STDERR.puts
"Finalizer #{id}"; STDERR.flush } )
      a
  end
  def gc
      GC.start
  end
end
DRb.start_service("drbunix:/tmp/testdrb", Server.new)
DRb.thread.join
### end of server.rb

And the client:


require 'drb'

DRb.start_service
b = DRbObject.new(nil, "drbunix://tmp/testdrb").pgproxy
100.times do 
  a = b.exec('aa')
end
b.gc
### end of client.rb

If I run them I don't see any garbage collection going on in the
server process, and the process size grows considerably.
Who is holding references to these arrays ?

Thanks in advance for any light shed on this.

Cheers,

Han Holl