[Buildbot-devel] Defunct processes in buildslave after ShellCommand completion

[John Pye]

Hi there

I've just seen this problem as well. I wonder if there might be a fix
that doesn't involve upgrading Python?

I'm thinking it could be a problem with the 'popen' routines in Python,
which were improved a lot with the release of 2.4.

Cheers
JP

On Thu, 16 Nov 2006 09:12:35 -0500, "Mitch Oliver"
<mitch.oliver at gmail.com> said:
> I wanted to reply to this as I found a solution.  Upgrading to Python
> 2.5 has resolved the issue.  It appears that the issue itself is in
> Twisted and not buildbot.
> 
> On 11/10/06, Mitch Oliver <mitch.oliver at gmail.com> wrote:
> > After a ShellCommand completes I frequently end up with defunct
> > processes in my process list, and the commands always end up with the
> > following exception in my buildmaster waterfall:
> >   command timed out: 1200 seconds without output, killing pid [pid]
> >   SIGKILL failed to kill process
> >   using fake rc=-1
> >   program finished with exit code -1
> >
> >   remoteFailed: [Failure instance: Traceback from remote host --
> > Traceback (most recent call last):
> >   Failure: buildbot.slave.commands.TimeoutError: SIGKILL failed to kill process
> >   ]
> >
> > This occurs using buildbot 0.7.4 in Python 2.3.3 with Twisted 2.4.0 on
> > Solaris 10 (Sparc).
> >
> > Has anyone else run into this problem?  I saw a message in the
> > archives about something similar on NetBSD, but the thread seems to
> > have died.
> >
> > Thanks,
> > Mitch Oliver
> >
> 
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-- 
John Pye
john at curioussymbols.com