30539
87%

Ran 08 Jun 2021 03:07PM UTC

Jobs 1

Files 874

Run time 3min

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Build # 30539

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travis-ci-com

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web-flow

Commit Message

Don't enable multiprocessing by default on Python 3.9 (#6524)

We've recently been hitting a slew of job timeouts in python 3.9 CI jobs
recently. This was originally reported in #6188 but the frequency of
these timeouts have spiked since #6270 merged which added sympy to the
default mulitprocessing path (for pickling symengine expressions by
first converting it to a sympy expression). Trying to debug this locally
is tricky but when I've reproduced it seems to be just hanging
indefinitely on pickling. I think whatever is causing the issue as
reported in #6188 was just made worse by adding a sympy import to the
pickling process (assuming there is a parameter expression in the
circuit). To workaround this issue until we can come up with a solution
for whatever is causing things to hang this commit disables
multiprocessing on python 3.9 by default (it can still be enabled by
users if they desire.

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

Coverage Stats

44583 of 54528 relevant lines covered (81.76%)

0.82 hits per line

Jobs

ID	Job ID	Ran	Files	Coverage
1	30539.1 (PYTHON="coverage run --source qiskit --parallel-mode" QISKIT_TEST_CAPTURE_STREAMS=1)	08 Jun 2021 03:07PM UTC	0	81.76	Travis Job 30539.1

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