From: Joel VanderWerf <vjoel@...>
Date: 2006-10-23T04:12:01+09:00
Subject: Re: thread dump?

cs5b@yahoo.com wrote:
> Hi there, I have a process that seems to be stuck somewhere. Is there
> the possibility of doing a thread dump to show where it is hanging on?
> Cheers -
> Christian

Not in general, without a Thread#backtrace method. I've asked for it...

http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/159482

As noted in that post, you can destructively find out where the thread 
is by calling #raise on it. Just make sure the thread has an exception 
handler somewhere to print out the exception and backtrace.

-- 
       vjoel : Joel VanderWerf : path berkeley edu : 510 665 3407