[Twisted-Python] Incorrect "Another twistd server is running..."

[Jean-Paul Calderone]

On Tue, 21 Jul 2009 19:33:26 +0800, Peter Cai <newptcai at gmail.com> wrote:
>When my server reboot after an unexpected power cut,
>supervisord tried to start a twisted app after an unexpected power cut,
>but it fails because "Another twistd server is running, PID 4607"
>4607 is the PID of the twisted app before power cut.
>
>After I stopped and restart supervisord, everything is OK.
>
>What might cause twistd to think that an non-exist process is running?
>

This is probably due to <http://twistedmatrix.com/trac/ticket/3851>.  It's
not clear what the best solution is yet.

Jean-Paul