html_url,issue_url,id,node_id,user,created_at,updated_at,author_association,body,reactions,performed_via_github_app,issue https://github.com/pydata/xarray/pull/4823#issuecomment-777706069,https://api.github.com/repos/pydata/xarray/issues/4823,777706069,MDEyOklzc3VlQ29tbWVudDc3NzcwNjA2OQ==,17162724,2021-02-11T18:42:59Z,2021-02-11T18:42:59Z,CONTRIBUTOR,"I think my Q on SO is related to this PR https://stackoverflow.com/questions/66145459/open-mfdataset-on-remote-zarr-store-giving-zarr-errors-groupnotfounderror Was looking at reading a remote zarr store using `open_mfdataset` @martindurant suggested putting the single ""file"" (mapping) in a list which works `ds = xr.open_mfdataset([file], engine=""zarr"")` but I also wanted to test the other suggestion `ds = xr.open_mfdataset(uri, engine=""zarr"", backend_kwargs=dict(storage_options={'anon': True}))` On current xarray master I get ``` Traceback (most recent call last): File """", line 1, in File ""/Users/ray.bell/Documents/PYTHON_dev/xarray/xarray/backends/api.py"", line 884, in open_mfdataset raise OSError(""no files to open"") OSError: no files to open ``` On this branch it works ``` git clone https://github.com/martindurant/xarray.git git checkout fsspec_mk2 conda create -c conda-forge -n xarray-tests python=3.8 conda env update -f ci/requirements/environment.yml conda activate xarray-tests pip install -e . pip install s3fs import xarray as xr uri = ""s3://era5-pds/zarr/2020/12/data/eastward_wind_at_10_metres.zarr"" ds = xr.open_mfdataset(uri, engine=""zarr"", backend_kwargs=dict(storage_options={'anon': True})) ``` ","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,788398518