cpopen missing again?

[Dan Kenigsberg]

On Thu, Apr 24, 2014 at 01:04:56PM -0400, Nir Soffer wrote:
> ----- Original Message -----
> > From: "Nir Soffer" <nsoffer at redhat.com>
> > To: "infra" <infra at ovirt.org>
> > Sent: Thursday, April 24, 2014 7:47:10 PM
> > Subject: cpopen missing again?
> > 
> > Didn't we resolved the issues with cpopen?
> > 
> > nosetests tests.py
> > E
> > ======================================================================
> > ERROR: Failure: ImportError (No module named cpopen)
> > ----------------------------------------------------------------------
> > Traceback (most recent call last):
> >   File "/usr/lib/python2.7/site-packages/nose/loader.py", line 413, in
> >   loadTestsFromName
> >     addr.filename, addr.module)
> >   File "/usr/lib/python2.7/site-packages/nose/importer.py", line 47, in
> >   importFromPath
> >     return self.importFromDir(dir_path, fqname)
> >   File "/usr/lib/python2.7/site-packages/nose/importer.py", line 94, in
> >   importFromDir
> >     mod = load_module(part_fqname, fh, filename, desc)
> >   File
> >   "/home/jenkins/workspace/vdsm_master_unit_tests_gerrit/vdsm/lib/zombiereaper/tests.py",
> >   line 24, in <module>
> >     from cpopen import CPopen
> > ImportError: No module named cpopen
> > 
> > See http://jenkins.ovirt.org/job/vdsm_master_unit_tests_gerrit/8419/console
> 
> Note that triggering again was successful on the same host:
> http://jenkins.ovirt.org/job/vdsm_master_unit_tests_gerrit/8420/
> 
> Looks like there is a race in the test setup/teardown code, removing and installing cpopen.

This problem would persist until we mutex jobs that mess with thr rpm
database. Yes: if a job removes an rpm, no other job that adds that rpm
should be scheduled. Yes, even if this means to serialize all jobs on a
single slave.

Eyal - it's better to have a slow CI environment than having a
non-reliable one.