[openstack-dev] Taskflow for Juno RC1 effectively require Kombu 3.x

Joshua Harlow harlowja at outlook.com
Wed Oct 1 15:59:29 UTC 2014


I'm fine with this if it works (seems pretty simple).

Let me know. I can get out an adjusted release if needed...

On Wed, Oct 1, 2014 at 6:10 AM, Ian Cordasco 
<ian.cordasco at RACKSPACE.COM> wrote:
> There just needs to be a fallback import. In v2.5.0 the Message class
> (which is the only item used from kombu.message) was in
> kombu.transport.base. Thomas, can you confirm that something like
> 
> try:
>     from kombu import message
> except ImportError:
>     from kombu.transport import base as message
> 
> Allows the tests to pass?
> 
> On 10/1/14, 6:09 AM, "Ihar Hrachyshka" <ihrachys at redhat.com> wrote:
> 
>> -----BEGIN PGP SIGNED MESSAGE-----
>> Hash: SHA512
>> 
>> On 01/10/14 12:55, Thomas Goirand wrote:
>>>  Hi,
>>>  
>>>  When building the latest release (eg: Juno RC1) of Taskflow 0.4,
>>>  needed by Cinder, I've notice failures due to the impossibility to
>>>  do:
>>>  
>>>  from kombu import message
>>>  
>>>  More in details, the failure is:
>>>  
>>>  
>>> ======================================================================
>>> 
>>>  
>> FAIL:
>>>  
>>> unittest.loader.ModuleImportFailure.taskflow.tests.unit.worker_based.test
>>> _dispatcher
>>> 
>>>  
>> unittest.loader.ModuleImportFailure.taskflow.tests.unit.worker_based.test_
>> dispatcher
>>>  
>>> ----------------------------------------------------------------------
>>> 
>>>  
>> _StringException: Traceback (most recent call last):
>>>  ImportError: Failed to import test module:
>>>  taskflow.tests.unit.worker_based.test_dispatcher Traceback (most
>>>  recent call last): File "/usr/lib/python2.7/unittest/loader.py",
>>>  line 252, in _find_tests module = self._get_module_from_name(name)
>>>  File "/usr/lib/python2.7/unittest/loader.py", line 230, in
>>>  _get_module_from_name __import__(name) File
>>>  "taskflow/tests/unit/worker_based/test_dispatcher.py", line 17, in
>>>  <module> from kombu import message ImportError: cannot import name
>>>  message
>> 
>> Does it show up in unit tests only?
>> 
>>>  
>>>  The thing is, there's no message.py in the latest Kombu 2.x, this
>>>  appears in version 3.0. Though in our global-requirements.txt, we
>>>  only have kombu>=2.5.0, which IMO is just completely wrong,
>>>  considering what Taskflow does in .
>>>  
>>>  Changing the requirement to be kombu>=3.0 means that we also need
>>>  to import new dependencies, as kombu 3.x needs python-beanstalkc.
>>>  
>>>  So here, we have 2 choices:
>>>  
>>>  1/ Fix Taskflow so that it really supports Kombu 2.5, as per our
>>>  decided Juno requirements.
>> 
>> Should be doable.
>> 
>>>  
>>>  2/ Accept beanstalkc and kombu>=3.0, modify our
>>>  global-requirements.txt and add these 2.
>> 
>> This will be a major pain point for both upstream and downstream.
>> Let's stick to the first option. I don't see why we should bump the
>> version unless there is no other way from it.
>> 
>>>  
>>>  Since Ubuntu is already in a deep freeze, probably 2/ isn't a very
>>>  good solution. Also, python-beanstalkc fails to build in Wheezy
>>>  (when doing its doc tests). I didn't investigate a lot why (yet),
>>>  but that's annoying.
>>>  
>>>  On my test system (eg: a cowbuilder chroot), I have just added a
>>>  Debian patch to completely remove
>>>  taskflow/tests/unit/worker_based/test_dispatcher.py from taskflow,
>>>  and everything works again (eg: no unit test errors). This is maybe
>>>  a bit more drastic than what we could do, probably... :)
>>>  
>>>  Joshua, I've CC-ed you because git blame told me that you were the
>>>  person writing these tests. Could you patch it quickly (eg: before
>>>  the final release of Juno) so that it works with the older Kombu?
>>>  
>>>  Thoughts anyone?
>>>  
>>>  Cheers,
>>>  
>>>  Thomas Goirand (zigo)
>>>  
>>>  _______________________________________________ OpenStack-dev
>>>  mailing list OpenStack-dev at lists.openstack.org
>>>  http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
>>>  
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