From: "Iñaki Baz Castillo" <ibc@...>
Date: 2008-06-30T01:41:35+09:00
Subject: Why can't I return "Threads.list" Array in DRb?

Hi, I can't understand why I can't return the current "Threads.list" array in 
a DRb server method.

- In the DRb server object I just do:

  def current_threads
    Thread.list
  end

- And the DRb client calls:

  drb_client.current_threads

but instead of an Array object I get a DRb::DRbObject, and in each call to 
this method I get a different "id":

irb> drb_client.current_threads
=> #<DRb::DRbObject:0xb7b8d384 @ref=-608642478, @uri="druby://0.0.0.0:10001">
irb> drb_client.current_threads
=> #<DRb::DRbObject:0xb7b8b675 @ref=-608644410, @uri="druby://0.0.0.0:10001">

Of course, I'm 100% sure that "Thread.list" returns an Array. If I return any 
other Array all works ok:

- DRb server:

  def current_threads
    [1,2,3,4,5]
  end

irb> drb_client.current_threads
[1,2,3,4,5]


Why does this issue occur when returning "Thread.list"?

Thanks for any help.


-- 
Iñaki Baz Castillo