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/4552#issuecomment-720059537,https://api.github.com/repos/pydata/xarray/issues/4552,720059537,MDEyOklzc3VlQ29tbWVudDcyMDA1OTUzNw==,10194086,2020-11-01T09:28:17Z,2020-11-01T09:28:17Z,MEMBER,I am closing this. Feel free to reopen if you think there more we can do.,"{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,732567105
https://github.com/pydata/xarray/issues/4552#issuecomment-719575453,https://api.github.com/repos/pydata/xarray/issues/4552,719575453,MDEyOklzc3VlQ29tbWVudDcxOTU3NTQ1Mw==,10194086,2020-10-30T14:11:38Z,2020-10-30T14:11:38Z,MEMBER,"I don't really see through. The 

```python-traceback
UFuncTypeError: ufunc 'multiply' did not contain a loop with signature matching types (dtype('<U6'), dtype('<U6')) -> dtype('<U6')
```
error hints at a dtype problem. The `B01:scale_factor = ""0.0001""` has `dtype=<U6` so maybe it fails trying to apply the `scale_factor`. The other error
```python traceback
RuntimeError: NetCDF: Attempting netcdf-4 operation on netcdf-3 file
```
sounds like a netCDF3 file is pretending to be a netCDF4 file. Also `file HLS.S30.T13SDD.2020004.v1.4.hdf` tells me it's a `hdf4` file. I thought netCDF4 files have to be hdf5 (but I am not sure).

To summarize
1. the file is maybe not meant to be opened as a netCDF but with a hdf library
2. the file may have an issue, either with the metadata or in the way the file is saved
3. if 2. and 3. are not the case, there _may_ be a bug in the netCDF4 library (because you also get the error using netCDF4 without xarray) So I am tagging this as upstream issue.","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,732567105
https://github.com/pydata/xarray/issues/4552#issuecomment-719072356,https://api.github.com/repos/pydata/xarray/issues/4552,719072356,MDEyOklzc3VlQ29tbWVudDcxOTA3MjM1Ng==,10194086,2020-10-29T23:03:30Z,2020-10-29T23:03:30Z,MEMBER,"Could you try `xr.open_dataset(f, decode_cf=False)`. It could also be helpful to know the output of `ncdump - k <file>` and `ncdump -h <file>`","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,732567105