[Buildbot-devel] Zombie process warning

Jean-Paul Calderone exarkun at divmod.com
Tue Sep 23 13:35:41 UTC 2008

On Tue, 23 Sep 2008 12:18:54 +0200, Axel Hecht <l10n.moz at googlemail.com> wrote:
>I see this consistantly on at least mac and linux when using twisted 8.1.
>Actually, I wonder if that isn't even intentional, because you don't
>want to see the child process die from the starter, right?
>I guess the right way to fix this is to explicitly handle that
>exception and silence it.

The way to fix this is to call reactor.run() before making any calls
to reactor.spawnProcess().

>> PotentialZombieWarning: spawnProcess called, but the SIGCHLD handler is
>> not installed. This probably means you have not yet called reactor.run,
>> or called reactor.run(installSignalHandler=0). You will probably never
>> see this process finish, and it may become a zombie process.


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