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/2300#issuecomment-805883595,https://api.github.com/repos/pydata/xarray/issues/2300,805883595,MDEyOklzc3VlQ29tbWVudDgwNTg4MzU5NQ==,1197350,2021-03-24T14:48:55Z,2021-03-24T14:48:55Z,MEMBER,"In #5056, I have implemented the solution of deleting `chunks` from encoding when `chunk()` is called on a variable. A review of that PR would be welcome. ","{""total_count"": 2, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 2, ""rocket"": 0, ""eyes"": 0}",,342531772
https://github.com/pydata/xarray/issues/2300#issuecomment-790088409,https://api.github.com/repos/pydata/xarray/issues/2300,790088409,MDEyOklzc3VlQ29tbWVudDc5MDA4ODQwOQ==,1197350,2021-03-03T21:55:44Z,2021-03-03T21:55:44Z,MEMBER,"> alternatively `to_zarr` could ignore `encoding[""chunks""]` when the data is already chunked?

I would not favor that. A user may choose to define their desired zarr chunks by putting this information in encoding. In this case, it's good to raise the error. (This is the case I had in mind when I wrote this code.)

The problem here is that encoding is often being carried over from the original dataset and persisted across operations that change chunk size.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,342531772
https://github.com/pydata/xarray/issues/2300#issuecomment-789974968,https://api.github.com/repos/pydata/xarray/issues/2300,789974968,MDEyOklzc3VlQ29tbWVudDc4OTk3NDk2OA==,1197350,2021-03-03T18:54:43Z,2021-03-03T18:54:43Z,MEMBER,I think we are all in agreement. Just waiting for someone to make a PR. It's probably just a few lines of code changes.,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,342531772
https://github.com/pydata/xarray/issues/2300#issuecomment-598790404,https://api.github.com/repos/pydata/xarray/issues/2300,598790404,MDEyOklzc3VlQ29tbWVudDU5ODc5MDQwNA==,1197350,2020-03-13T15:51:54Z,2020-03-13T15:51:54Z,MEMBER,"Hi all. I am looking into this issue, trying to figure out if it is still a thing. I just tried @chrisbarber's MRE above using xarray v 0.15.

```python
import xarray as xr
ds=xr.Dataset({'foo': (['bar'], np.zeros((505359,)))})
ds.to_zarr('test.zarr', mode='w')
ds2=xr.open_zarr('test.zarr')
ds2.to_zarr('test2.zarr', mode='w')
```
This now works without error, thanks to #2487.

I can trigger the error in a third step:
```python
ds3 = ds2.chunk({'bar': 10000})
ds3.to_zarr('test3.zarr', mode='w')
```

raises
```
NotImplementedError: Specified zarr chunks (63170,) would overlap multiple dask chunks ((10000, 10000, 10000, 10000, 10000, 10000, 10000, 10000, 10000, 10000, 10000, 10000, 10000, 10000, 10000, 10000, 10000, 10000, 10000, 10000, 10000, 10000, 10000, 10000, 10000, 10000, 10000, 10000, 10000, 10000, 10000, 10000, 10000, 10000, 10000, 10000, 10000, 10000, 10000, 10000, 10000, 10000, 10000, 10000, 10000, 10000, 10000, 10000, 10000, 10000, 5359),). This is not implemented in xarray yet.  Consider rechunking the data using `chunk()` or specifying different chunks in encoding.
```

The problem is that, even though we rechunked the data, `chunks` key is still present in `encoding`.
```python
>>> print(ds3.foo.encoding)
{'chunks': (63170,), 'compressor': Blosc(cname='lz4', clevel=5, shuffle=SHUFFLE, blocksize=0), 'filters': None, '_FillValue': nan, 'dtype': dtype('float64')}
```

This was populated with the variable was read from `test.zarr`.

As a workaround, you can delete the encoding (either just the `chunk` attribute or all of it):
```python
ds3.foo.encoding = {}
ds3.to_zarr('test3.zarr', mode='w')
```
This allows the operation to complete successfully.

For all the users stuck on this problem (e.g. @abarciauskas-bgse):
- update to the latest version of xarray and then
- delete the encoding on your variables, or overwrite it with the `encoding` keyword in `to_zarr`.

For xarray developers, the question is whether the `chunk()` method  should delete existing `chunks` attributes from encoding.","{""total_count"": 3, ""+1"": 3, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,342531772