# fgcmcal failure Ubuntu

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## Details

• Type: Story
• Status: Done
• Resolution: Done
• Fix Version/s: None
• Component/s:
• Labels:
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• Story Points:
1
• Urgent?:
No

## Description

fgcmcal fails on master with the latest conda environment on Ubuntu 18.04.4. The failure is in one of the new tests comparing the photoCalib.getCalibrationErr() with the fgcmZptGrayErr:

 tests/test_fgcmcal_hsc.py:154:  _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _  tests/fgcmcalTestBase.py:407: in _testFgcmOutputProducts  (np.log(10.0)/2.5)*testCal.getCalibrationMean()*fgcmZptGrayErr) ../../stack/Linux64/utils/19.0.0-7-g686a884+2/python/lsst/utils/tests.py:656: in assertFloatsAlmostEqual  testCase.assertFalse(failed, msg="\n".join(errMsg)) E AssertionError: True is not false : 1/1 elements differ with rtol=2.220446049250313e-16, atol=2.220446049250313e-16 E 0.00223844323512219 != 0.0022384434 (diff=2.3283064e-10/0.0022384434=1.0401453e-07) 

We are not seeing this on other machines (CentOS, macOS), so there's probably a "fun" interaction with system libraries going on here. Adding rtol=2e-7, atol=None to the above test prevents the error, but may not be the actual solution we want. This suggests to me that there's a float32 calculation going on under the hood somewhere.

I can provide an Ubuntu account to test on.

## People

• Assignee:
Eli Rykoff
Reporter:
John Parejko
Reviewers:
John Parejko
Watchers:
Eli Rykoff, John Parejko, John Swinbank, Krzysztof Findeisen