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  • test_reduce[None-True-var-True-float32-2] fails on i386 · 9 ✖
id html_url issue_url node_id user created_at updated_at ▲ author_association body reactions performed_via_github_app issue
408590300 https://github.com/pydata/xarray/issues/2063#issuecomment-408590300 https://api.github.com/repos/pydata/xarray/issues/2063 MDEyOklzc3VlQ29tbWVudDQwODU5MDMwMA== ginggs 1970404 2018-07-28T07:50:43Z 2018-07-28T07:50:43Z CONTRIBUTOR

This issue has gone away. Weirdly, it seems to have happened after NumPy was upgraded to 1.14, and Dask was still at 0.16.

 
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   test_reduce[None-True-var-True-float32-2] fails on i386 314670220
384776509 https://github.com/pydata/xarray/issues/2063#issuecomment-384776509 https://api.github.com/repos/pydata/xarray/issues/2063 MDEyOklzc3VlQ29tbWVudDM4NDc3NjUwOQ== ginggs 1970404 2018-04-26T20:20:59Z 2018-04-26T20:20:59Z CONTRIBUTOR

Same results with dask: 0.17.2. Thanks for your help.

 
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   test_reduce[None-True-var-True-float32-2] fails on i386 314670220
384756623 https://github.com/pydata/xarray/issues/2063#issuecomment-384756623 https://api.github.com/repos/pydata/xarray/issues/2063 MDEyOklzc3VlQ29tbWVudDM4NDc1NjYyMw== ginggs 1970404 2018-04-26T19:07:24Z 2018-04-26T19:07:24Z CONTRIBUTOR

I have dask: 0.16.0 installed and there is a 0.17.2 out. I'll try upgrading that and see if it helps.

 
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   test_reduce[None-True-var-True-float32-2] fails on i386 314670220
384741776 https://github.com/pydata/xarray/issues/2063#issuecomment-384741776 https://api.github.com/repos/pydata/xarray/issues/2063 MDEyOklzc3VlQ29tbWVudDM4NDc0MTc3Ng== shoyer 1217238 2018-04-26T18:23:11Z 2018-04-26T18:23:11Z MEMBER

OK, so it looks like a dask.array issue. (I got runtime warnings, too, but I think those can be safely ignored.)

 
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   test_reduce[None-True-var-True-float32-2] fails on i386 314670220
384707323 https://github.com/pydata/xarray/issues/2063#issuecomment-384707323 https://api.github.com/repos/pydata/xarray/issues/2063 MDEyOklzc3VlQ29tbWVudDM4NDcwNzMyMw== shoyer 1217238 2018-04-26T16:35:24Z 2018-04-26T18:21:40Z MEMBER

I think the following script should reproduce the issue and identify which library is the source of the issue: ``` import dask.array as da import numpy as np import pandas as pd import bottleneck

rng = np.random.RandomState(0) x = np.concatenate([rng.randn(16, 8).astype(np.float32), np.nan * np.zeros((4, 8)).astype(np.float32)])

print('numpy', np.nanvar(x)) print('dask', da.nanvar(da.from_array(x, 4)).compute()) print('pandas', pd.Series(x.ravel()).var(ddof=0)) print('bottleneck', bottleneck.nanvar(x)) ```

On my laptop, this prints: numpy 1.0792575 dask 1.0792574 pandas 1.0792568922042847 bottleneck 1.0792568922042847

 
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   test_reduce[None-True-var-True-float32-2] fails on i386 314670220
384729424 https://github.com/pydata/xarray/issues/2063#issuecomment-384729424 https://api.github.com/repos/pydata/xarray/issues/2063 MDEyOklzc3VlQ29tbWVudDM4NDcyOTQyNA== ginggs 1970404 2018-04-26T17:48:31Z 2018-04-26T17:48:31Z CONTRIBUTOR

Thanks!

After adding: import dask.array as da I get: numpy 1.07926 /usr/lib/python3/dist-packages/dask/array/reductions.py:297: RuntimeWarning: invalid value encountered in true_divide u = total / n /usr/lib/python3/dist-packages/dask/array/numpy_compat.py:46: RuntimeWarning: invalid value encountered in true_divide x = np.divide(x1, x2, out) dask 1.09559 pandas 1.0792573690414429 bottleneck 1.0792573690414429

 
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   test_reduce[None-True-var-True-float32-2] fails on i386 314670220
384631112 https://github.com/pydata/xarray/issues/2063#issuecomment-384631112 https://api.github.com/repos/pydata/xarray/issues/2063 MDEyOklzc3VlQ29tbWVudDM4NDYzMTExMg== ginggs 1970404 2018-04-26T12:56:06Z 2018-04-26T12:56:06Z CONTRIBUTOR

Hi, any ideas, please?

 
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   test_reduce[None-True-var-True-float32-2] fails on i386 314670220
381666083 https://github.com/pydata/xarray/issues/2063#issuecomment-381666083 https://api.github.com/repos/pydata/xarray/issues/2063 MDEyOklzc3VlQ29tbWVudDM4MTY2NjA4Mw== ginggs 1970404 2018-04-16T16:29:56Z 2018-04-16T16:29:56Z CONTRIBUTOR

Thanks, here you go: ```

xarray.show_versions()

INSTALLED VERSIONS

commit: None python: 3.6.5.candidate.1 python-bits: 32 OS: Linux OS-release: 4.15.0-12-generic machine: i686 processor: athlon byteorder: little LC_ALL: None LANG: en_ZA.UTF-8 LOCALE: en_ZA.UTF-8

xarray: 0.10.3 pandas: 0.22.0 numpy: 1.13.3 ... bottleneck: 1.2.0 ... ```

 
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   test_reduce[None-True-var-True-float32-2] fails on i386 314670220
381651113 https://github.com/pydata/xarray/issues/2063#issuecomment-381651113 https://api.github.com/repos/pydata/xarray/issues/2063 MDEyOklzc3VlQ29tbWVudDM4MTY1MTExMw== shoyer 1217238 2018-04-16T15:44:05Z 2018-04-16T15:44:05Z MEMBER

Thanks for the report. This is likely an upstream bug but I can help direct this to the appropriate place.

Can you please share the output of xarray.show_versions()? At least, which versions (if any) of bottleneck, numpy and pandas do you have installed?

 
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   test_reduce[None-True-var-True-float32-2] fails on i386 314670220

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