issues: 1299316581

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id node_id number title user state locked assignee milestone comments created_at updated_at closed_at author_association active_lock_reason draft pull_request body reactions performed_via_github_app state_reason repo type
1299316581 I_kwDOAMm_X85Ncf9l 6766 xr.open_dataset(url) gives NetCDF4 (lru_cache.py) error "oc_open: Could not read url" 10137 closed 0     8 2022-07-08T18:15:18Z 2022-07-11T14:49:10Z 2022-07-11T14:49:09Z NONE      

What is your issue?

This code I use was working about a year ago but today gives me an error:

import xarray as xr url = 'http://psl.noaa.gov/thredds/dodsC/Datasets/NARR/monolevel/uwnd.10m.2000.nc' ds = xr. open_dataset(url) The Traceback includes the following: File "C:\Users\Codiga_D\AppData\Local\Continuum\miniconda3\envs\EQ\lib\site-packages\xarray\backends\lru_cache.py", line 53, in __getitem__ value = self._cache[key] and ``` OSError: [Errno -68] NetCDF: I/O failure: b'http://psl.noaa.gov/thredds/dodsC/Datasets/NARR/monolevel/uwnd.10m.2000.nc'

Note:Caching=1 Error:curl error: SSL connect error curl error details: Warning:oc_open: Could not read url ``` I have confirmed that the file I am trying to read is on the server and the server is not requiring a password (nothing I am aware of, about the server, has changed since my code used to work successfully).

I am on Windows using a conda virtual env (no pip). My xarray is 0.20.2 and my netCDF4 is 1.6.0-- these are almost certainly more recent than the ones I was using when my code used to succeed, but I didn't record which version(s) used to work.

It was suggested that I pin netcdf4 to 1.5.8, so I tried this but got the same error.

Recently I had to update security certificates locally here, and this could be related, but I'm not sure.

Any suggestions for how I should troubleshoot this?

Also, should I post an issue at https://github.com/Unidata/netcdf4-python instead of, and/or in addition to, this one?

I found these issues, which seem possibly related, but don't seem to be resolved well yet: https://github.com/Unidata/netcdf4-python/issues/755 https://github.com/pydata/xarray/issues/4925

(I also opened 'discussion' #6742 but so far there has been little response there.)

 
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