Joblib heisen bug failure

[arjoly]

Hi,

I got the following joblib heisen-bug failure while working on a scikit-learn pull request
scikit-learn/scikit-learn#3173. It's not the first time.

The full travis log is at https://travis-ci.org/scikit-learn/scikit-learn/jobs/25871214

======================================================================
FAIL: sklearn.externals.joblib.test.test_parallel.test_dispatch_multiprocessing('threading',)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/travis/virtualenv/python2.7_with_system_site_packages/local/lib/python2.7/site-packages/nose/case.py", line 197, in runTest
    self.test(*self.arg)
  File "/home/travis/build/scikit-learn/scikit-learn/sklearn/externals/joblib/test/test_parallel.py", line 270, in check_dispatch_multiprocessing
    'Consumed any', ])
AssertionError: Lists differ: ['Produced 0', 'Produced 1', '... != ['Produced 0', 'Produced 1', '...
First differing element 2:
Consumed any
Produced 2
- ['Produced 0', 'Produced 1', 'Consumed any', 'Consumed any']
+ ['Produced 0', 'Produced 1', 'Produced 2', 'Consumed any']
    """Fail immediately, with the given message."""
>>  raise self.failureException("Lists differ: ['Produced 0', 'Produced 1', '... != ['Produced 0', 'Produced 1', '...\n\nFirst differing element 2:\nConsumed any\nProduced 2\n\n- ['Produced 0', 'Produced 1', 'Consumed any', 'Consumed any']\n+ ['Produced 0', 'Produced 1', 'Produced 2', 'Consumed any']")

Hope it helps.

[ogrisel]

I think I have fixed it in joblib master: 6c4abdb although I thing I still observed on joblib's travis once after the fix, but I am not 100% sure either... So my fix might not be 100% correct.

I plan to do a release of joblib soon and synchronize the scikit-learn version to include that fix.

[arjoly]

thanks !

[ogrisel]

I think this one is fixed now. Occurrences I saw where in old branches that did not have that fix.