issue_comments: 1059121536

Effectively I have unstable results with sometimes errors with timesteps refusing to write I systematically have this warning python /opt/conda/lib/python3.7/site-packages/xarray/core/dataset.py:2050: SerializationWarning: saving variable None with floating point data as an integer dtype without any _FillValue to use for NaNs safe_chunks=safe_chunks, the crashes are related to dimension of time itself but time is always of size 1, so it is hard to understand

``` python /tmp/ipykernel_1629/1269180709.py in aggregate_with_time(farm_name, resolution_M, canvas, W, H, master_raster_coordinates) 39 raster.drop( 40 ['x','y']).to_zarr( ---> 41 uri, mode='a', append_dim='time') 42 #except: 43 #print('something went wrong')

/opt/conda/lib/python3.7/site-packages/xarray/core/dataset.py in to_zarr(self, store, chunk_store, mode, synchronizer, group, encoding, compute, consolidated, append_dim, region, safe_chunks, storage_options) 2048 append_dim=append_dim, 2049 region=region, -> 2050 safe_chunks=safe_chunks, 2051 ) 2052

/opt/conda/lib/python3.7/site-packages/xarray/backends/api.py in to_zarr(dataset, store, chunk_store, mode, synchronizer, group, encoding, compute, consolidated, append_dim, region, safe_chunks, storage_options) 1406 _validate_datatypes_for_zarr_append(dataset) 1407 if append_dim is not None: -> 1408 existing_dims = zstore.get_dimensions() 1409 if append_dim not in existing_dims: 1410 raise ValueError(

/opt/conda/lib/python3.7/site-packages/xarray/backends/zarr.py in get_dimensions(self) 450 if d in dimensions and dimensions[d] != s: 451 raise ValueError( --> 452 f"found conflicting lengths for dimension {d} " 453 f"({s} != {dimensions[d]})" 454 )

ValueError: found conflicting lengths for dimension time (2 != 1) ```