From: Aaron Patterson <tenderlove@...>
Date: 2012-06-24T05:49:44+09:00
Subject: [ruby-core:45811] Re: [ruby-trunk - Bug #6634][Open] Deadlock with join and ConditionVariable


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On Sat, Jun 23, 2012 at 11:49:14PM +0900, meh. (meh. I don't care) wrote:
>=20
> Issue #6634 has been reported by meh. (meh. I don't care).
>=20
> ----------------------------------------
> Bug #6634: Deadlock with join and ConditionVariable
> https://bugs.ruby-lang.org/issues/6634
>=20
> Author: meh. (meh. I don't care)
> Status: Open
> Priority: Normal
> Assignee:=20
> Category: core
> Target version:=20
> ruby -v: ruby 1.9.3p194 (2012-04-20 revision 35410) [x86_64-linux]
>=20
>=20
> I'm getting a fatal deadlock in one of my gems, it's a simple threadpool =
implementation.
>=20
> The library works both in Rubinius and JRuby, so I guess it's a bug.
>=20
> The gem is here: https://github.com/meh/ruby-threadpool
>=20
> The example that crashes is attached.
>=20
> Basically it raises a fatal deadlock if you join a thread and then call C=
onditionVariable#wait, I'm not 100% sure if the bug is in the ConditionVari=
able or what, all I know is that it happens in that situation and that it w=
orks on Rubinius and JRuby.

I can't seem to reproduce this error:

  http://www.youtube.com/watch?v=3D8J_eBXZ7ud4

Can you reduce the error to a self contained example that reliably
fails?

--=20
Aaron Patterson
http://tenderlovemaking.com/

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