Closed
Description
Describe the bug
The xarray open_mfdataset function dies with an error when trying to read more than one file created by GCHP using the new MAPL v1.0.0 (i.e. in GCHP 12.5.0 and later versions).
To Reproduce
import xarray as xr
filelist = [ '/path/to/GCHP/file1.nc', '/path/to/GCHP/file2.nc']
ds = xr.open_mfdataset(filelist)
Expected behavior
The returned dataset should contain the merged data from e.g. file1.nc and file2.nc.
Screenshots
Instead, this error occurs:
File "./run_1mo_benchmark.py", line 479, in <module>
ds = xr.open_mfdataset([gchp_vs_gchp_refspc, gchp_vs_gchp_refaod])
File "/net/seasasfs02/srv/export/seasasfs02/share_root/ryantosca/python/geo/miniconda/envs/geo/lib/python3.6/site-packages/xarray/backends/api.py", line 719, in open_mfdataset
ids=ids)
File "/net/seasasfs02/srv/export/seasasfs02/share_root/ryantosca/python/geo/miniconda/envs/geo/lib/python3.6/site-packages/xarray/core/combine.py", line 553, in _auto_combine
data_vars=data_vars, coords=coords)
File "/net/seasasfs02/srv/export/seasasfs02/share_root/ryantosca/python/geo/miniconda/envs/geo/lib/python3.6/site-packages/xarray/core/combine.py", line 475, in _combine_nd
compat=compat)
File "/net/seasasfs02/srv/export/seasasfs02/share_root/ryantosca/python/geo/miniconda/envs/geo/lib/python3.6/site-packages/xarray/core/combine.py", line 493, in _auto_combine_all_along_first_dim
data_vars, coords)
File "/net/seasasfs02/srv/export/seasasfs02/share_root/ryantosca/python/geo/miniconda/envs/geo/lib/python3.6/site-packages/xarray/core/combine.py", line 514, in _auto_combine_1d
merged = merge(concatenated, compat=compat)
File "/net/seasasfs02/srv/export/seasasfs02/share_root/ryantosca/python/geo/miniconda/envs/geo/lib/python3.6/site-packages/xarray/core/merge.py", line 532, in merge
variables, coord_names, dims = merge_core(dict_like_objects, compat, join)
File "/net/seasasfs02/srv/export/seasasfs02/share_root/ryantosca/python/geo/miniconda/envs/geo/lib/python3.6/site-packages/xarray/core/merge.py", line 451, in merge_core
variables = merge_variables(expanded, priority_vars, compat=compat)
File "/net/seasasfs02/srv/export/seasasfs02/share_root/ryantosca/python/geo/miniconda/envs/geo/lib/python3.6/site-packages/xarray/core/merge.py", line 170, in merge_variables
merged[name] = unique_variable(name, var_list, compat)
File "/net/seasasfs02/srv/export/seasasfs02/share_root/ryantosca/python/geo/miniconda/envs/geo/lib/python3.6/site-packages/xarray/core/merge.py", line 90, in unique_variable
% (name, out, var))
xarray.core.merge.MergeError: conflicting values for variable 'anchor' on objects to be combined:
first value: <xarray.Variable (nf: 6, ncontact: 4)>
dask.array<shape=(6, 4, 4), dtype=int32, chunksize=(6, 4, 4)>
Attributes:
long_name: anchor point
second value: <xarray.Variable (nf: 6, ncontact: 4)>
dask.array<shape=(6, 4, 4), dtype=int32, chunksize=(6, 4, 4)>
Attributes:
long_name: anchor point
Required information:
- OS: CentOS 7
- python 3.6.9
- xarray 0.12.1
- netcdf-fortran 4.4.4
- netcdf4 1.4.2
- dask 2.3.0
- dask-core 2.3.0
- numpy 1.16.4
- numpy-base 1.16.4
- scipy 1.3.1
Additional context
The problem seems to be caused by a single variable called "anchor".