issues: 717217552

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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
717217552 MDU6SXNzdWU3MTcyMTc1NTI= 4495 `combine_by_coords` fails giving StopIteration error 20053498 closed 0     5 2020-10-08T10:24:42Z 2020-10-13T07:03:24Z 2020-10-13T07:03:24Z NONE      

The dataset is WFDEI historical tasmax downloaded from ESGF. (isimip2a.input.clim_atm_obs.WFDEI.historical.tasmax.daily.v20190812|esg.pik-potsdam.de) Can provide a wget script if necessary.

The code is as follows: import xarray as xr from pathlib import Path directory = Path("/gws/nopw/j04/bas_climate/users/champs/WFDEI") input_paths = list(directory.glob('tasmax_*nc')) xr.open_mfdataset(input_paths, combine='by_coords', use_cftime=True)

The error message ```

StopIteration Traceback (most recent call last) <ipython-input-2-5f457963cf48> in <module> 4 directory = Path("/gws/nopw/j04/bas_climate/users/champs/WFDEI") 5 input_paths = list(directory.glob('tasmax_*nc')) ----> 6 xr.open_mfdataset(input_paths, combine='by_coords', use_cftime=True)

~/miniconda3/envs/ucd/lib/python3.7/site-packages/xarray/backends/api.py in open_mfdataset(paths, chunks, concat_dim, compat, preprocess, engine, lock, data_vars, coords, combine, autoclose, parallel, join, attrs_file, **kwargs) 957 # previously 958 combined = combine_by_coords( --> 959 datasets, compat=compat, data_vars=data_vars, coords=coords, join=join 960 ) 961 else:

~/miniconda3/envs/ucd/lib/python3.7/site-packages/xarray/core/combine.py in combine_by_coords(datasets, compat, data_vars, coords, fill_value, join) 700 compat=compat, 701 fill_value=fill_value, --> 702 join=join, 703 ) 704

~/miniconda3/envs/ucd/lib/python3.7/site-packages/xarray/core/combine.py in _combine_nd(combined_ids, concat_dims, data_vars, coords, compat, fill_value, join) 180 """ 181 --> 182 example_tile_id = next(iter(combined_ids.keys())) 183 184 n_dims = len(example_tile_id)

StopIteration: ```

Each of the files can be opened individually with xr.open_dataset.

Environment:

INSTALLED VERSIONS

commit: None python: 3.7.7 (default, Mar 23 2020, 22:36:06) [GCC 7.3.0] python-bits: 64 OS: Linux OS-release: 3.10.0-1127.19.1.el7.x86_64 machine: x86_64 processor: x86_64 byteorder: little LC_ALL: None LANG: en_GB.UTF-8 LOCALE: en_GB.UTF-8 libhdf5: 1.10.4 libnetcdf: 4.6.1

xarray: 0.15.1 pandas: 1.0.3 numpy: 1.18.1 scipy: 1.3.2 netCDF4: 1.4.2 pydap: None h5netcdf: 0.8.0 h5py: 2.10.0 Nio: None zarr: None cftime: 1.1.2 nc_time_axis: 1.2.0 PseudoNetCDF: None rasterio: 1.0.21 cfgrib: None iris: 2.4.0 bottleneck: None dask: 2.11.0 distributed: 2.11.0 matplotlib: 3.1.3 cartopy: 0.17.0 seaborn: None numbagg: None setuptools: 46.2.0.post20200511 pip: 20.0.2 conda: None pytest: None IPython: 7.13.0 sphinx: None

 
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