From: juergen@...
Date: 2002-03-22T03:06:14+09:00
Subject: drb weirdness

Hello,

I am using drb-1.3.4 with ruby-1.6.6 and I am trying to get the
examples from 'Programming Ruby' to run.
I have a server that looks like this:

---
#! /usr/bin/ruby -w

require 'drb'

class TestServer
  def doit
    "Hello, Distributed World"
  end
end

aServerObject = TestServer.new
DRb.start_service('druby://cavemaus.fiedlerfamily.net:15986', aServerObject)
DRb.thread.join
---

and a client that looks like this:

---
#! /usr/bin/ruby -w

require 'drb'

DRb.start_service()
obj = DRbObject.new(nil, 'druby://cavemaus.fiedlerfamily.net:15986')
p obj.doit
---

The server starts OK and running the client produces the expected
output. But every time the 'p obj.doit' line of the client executes,
the server prints the following error message:

---
#<TypeError: invalid header>
/usr/lib/ruby/1.6/drb/drb.rb:118:in `load'
/usr/lib/ruby/1.6/drb/drb.rb:143:in `recv_request'
/usr/lib/ruby/1.6/drb/drb.rb:447:in `proc'
/usr/lib/ruby/1.6/drb/drb.rb:488:in `loop'
/usr/lib/ruby/1.6/drb/drb.rb:488:in `proc'
/usr/lib/ruby/1.6/drb/drb.rb:439:in `start'
/usr/lib/ruby/1.6/drb/drb.rb:439:in `proc'
/usr/lib/ruby/1.6/drb/drb.rb:408:in `run'
/usr/lib/ruby/1.6/drb/drb.rb:405:in `start'
/usr/lib/ruby/1.6/drb/drb.rb:405:in `run'
/usr/lib/ruby/1.6/drb/drb.rb:367:in `initialize'
/usr/lib/ruby/1.6/drb/drb.rb:497:in `new'
/usr/lib/ruby/1.6/drb/drb.rb:497:in `start_service'
../server.rb:12
---

Line 12 is the start_service call.
Does anybody know what that means and how I can get rid of this message?
While I'm at it, is there any drb documentation besides the reference
manual that is not in Japanese?

Any help would be greatly appreciated.
Thanks in advance,

Juergen