[Buildbot-devel] Buildbot unable to kill processes on windows slaves

Marcus Lindblom macke at yar.nu
Tue Jul 28 17:55:21 UTC 2009

Jonathan Rogers wrote:
> Hi,
> We are having trouble with buildbot being unable to kill off processes 
> on a windows slave.
> The slave is running on windows vista in a command shell (not as a service).
> The error we get is "buildbot.slave.commands.TimeoutError: SIGKILL 
> failed to kill process". It seems to occur any time buildbot tries to 
> kill a process (be it via the "Stop Build" button or timing out).
> The annoying thing is that it requires someone to manually kill off the 
> process before another build can run because the next build is unable to 
> delete the directory due to the executable being locked.
> Any ideas on how to solve this issue would be appreciated.

There is a ticket in Twisted's Trac for this. That contains a patch that 
helps with killing off spawned subprocesses.

Why it hasn't been folded into the core after a few years, I don't know.


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