From: Lars Christensen <larsch@...>
Date: 2008-04-22T20:20:07+09:00
Subject: Deadlock in DRb

In a program with two DRb servers running (two time start_service), i
get the following deadlock after a while of running with a client
connecting to both servers:

deadlock 0x284c748: sleep:J(0x2c84f7c) (main) - server.rb:54
deadlock 0x2c84f7c: sleep:F(4)  - c:/lang/ruby/lib/ruby/1.8/drb/drb.rb:
944
deadlock 0x2d01338: sleep:F(5)  - c:/lang/ruby/lib/ruby/1.8/drb/drb.rb:
566
deadlock 0x2c854cc: sleep:F(3)  - c:/lang/ruby/lib/ruby/1.8/drb/drb.rb:
944
deadlock 0x2cff81c: sleep:S  - c:/lang/ruby/lib/ruby/1.8/drb/drb.rb:
626
c:/lang/ruby/lib/ruby/1.8/drb/drb.rb:626: Thread(0x2cff81c): deadlock
(fatal)

How can I debug this issue? I don't understand why it is a deadlock at
all, since drb.rb:944 is a call to Socket#accept, which does not
depend purely on other Ruby threads.

Any ideas?

Lars