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/issues/2278#issuecomment-404873326,https://api.github.com/repos/pydata/xarray/issues/2278,404873326,MDEyOklzc3VlQ29tbWVudDQwNDg3MzMyNg==,11750960,2018-07-13T15:48:46Z,2018-07-13T15:48:46Z,CONTRIBUTOR,Could you please be more specific about where this is done for netCDF?,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,340192831
https://github.com/pydata/xarray/issues/2278#issuecomment-404503718,https://api.github.com/repos/pydata/xarray/issues/2278,404503718,MDEyOklzc3VlQ29tbWVudDQwNDUwMzcxOA==,11750960,2018-07-12T12:59:44Z,2018-07-12T13:00:01Z,CONTRIBUTOR,Note that there is also a fix for case 2 that is simply `del ds['v'].encoding['chunks']` prior to data storage.,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,340192831
https://github.com/pydata/xarray/issues/2278#issuecomment-404503025,https://api.github.com/repos/pydata/xarray/issues/2278,404503025,MDEyOklzc3VlQ29tbWVudDQwNDUwMzAyNQ==,11750960,2018-07-12T12:57:17Z,2018-07-12T12:57:35Z,CONTRIBUTOR,"With the same case, I have another error message which may reflect the same issue (or not), maybe you can tell me. The error message is different which is the reason I am posting this.

Starting from the same dataset:
```
nx, ny, nt = 32, 32, 64
ds = xr.Dataset({}, coords={'x':np.arange(nx),'y':np.arange(ny), 't': np.arange(nt)})
ds = ds.assign(v=ds.t*np.cos(np.pi/180./100*ds.x)*np.cos(np.pi/180./50*ds.y))
ds = ds.chunk({'t': 1, 'x': nx/2, 'y': ny/2})
ds.to_zarr('data.zarr', mode='w')
```

Case 1 works fine:
```
ds = ds.chunk({'t': nt, 'x': nx/4, 'y': ny/4})
ds.to_zarr('data_rechunked.zarr', mode='w')
```

Case 2 breaks:
```
ds = xr.open_zarr('data.zarr')
ds = ds.chunk({'t': nt, 'x': nx/4, 'y': ny/4})
ds.to_zarr('data_rechunked.zarr', mode='w')
```
with the following error message:
```
 ....
NotImplementedError: Specified zarr chunks (1, 16, 16) would overlap multiple dask chunks ((64,), (8, 8, 8, 8), (8, 8, 8, 8)). This is not implemented in xarray yet.  Consider rechunking the data using `chunk()` or specifying different chunks in encoding.
```","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,340192831
https://github.com/pydata/xarray/issues/2278#issuecomment-404415760,https://api.github.com/repos/pydata/xarray/issues/2278,404415760,MDEyOklzc3VlQ29tbWVudDQwNDQxNTc2MA==,11750960,2018-07-12T07:25:36Z,2018-07-12T07:25:36Z,CONTRIBUTOR,"thanks for the workaround suggestion.
Apparently you also need to delete chunks for the `t` singleton coordinate though.
The workaround looks at the end like:
```
ds = xr.open_zarr('data.zarr')
del ds['v'].encoding['chunks']
del ds['t'].encoding['chunks']
ds.isel(t=0).to_zarr('data_t0.zarr', mode='w')
```
Any idea about how serious this is and/or where it's coming from?","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,340192831