[Python-Dev] Buildbot failures

[Jean-Paul Calderone]

On Thu, 7 Feb 2008 09:08:26 -0500, "A.M. Kuchling" <amk at amk.ca> wrote:
>On Wed, Feb 06, 2008 at 08:34:21PM -0500, Raymond Hettinger wrote:
>> Also, test_docxmlrpc hasn't been happy. One of the tests isn't
>> getting the exact response string it expected.  Any ideas what is
>> causing this?
>
>My fault; it should be fixed now.
>
>> There is also a recurring failure in SocketServer.py returning
>> "ValueError: list.remove(x): x not in list" during attempts to
>> remove a PID from the list of active_children.  Any ideas about what
>> is causing this?
>
>I couldn't find a current build that was showing this error, but
>searching python.org turned up one that had been indexed:
>
>http://www.python.org/dev/buildbot/trunk/ppc%20Debian%20unstable%20trunk/builds/726/step-test/0
>
>I don't see what could be causing this failure, though; the test isn't
>starting any subprocesses outside of what the ForkingServer class
>does.  I don't see how this could be an artifact of the buildbot
>environment, either.
>
>It would be easy to add an 'if pid in self.active_children' to the
>code, but I don't want to do that without understanding the problem.

You could instrument fork() so that it logs the call stack and the child
PID and instrument ForkingServer so that it reports which PID it is about
to try to remove from active_children.  Perhaps this will point to the
problem.

Jean-Paul