From: David Rodriguez <david.francisco.rodriguez@...>
Date: 2009-12-15T10:31:41+09:00
Subject: Multithread TCPServer not dequeueing packets

Hi All

I am moving a software from ruby 1.8.5 to 1.9.1. We have a multi thread
TCP server and the code looks like:
        @csock = TCPServer.new(@host, port)
        @server_thread_id = Thread.new { server() }
        def server()
           while (session_sock = @csock.accept)
               worker_thread = Thread.new {
handle_connection(session_sock)}
           end
        end

But when I moved to 1.9.1, I downloaded 1.9.1p376, it accepted all the
connections but sometimes some of then, the thread did not dequeue any
packets after all. So I google and I found a bug
http://redmine.ruby-lang.org/issues/show/1525

which seems related.So I applied the patch suggested on that thread (I
attached the patch) and everything worked just fine after that. My
question is: should I code the server in a different way to make it
multithread safe using ruby 1.9.1?

Thanks,

David Rodriguez

Attachments:
http://www.ruby-forum.com/attachment/4322/vm_deadlock_fix.diff

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