What happened?

I have set up a ipynb notebook that may be a clear explanation:

https://github.com/jerabaul29/misc/blob/main/BugReports/OpeningIssueXarray/issue_opening_2018_03_b.ipynb

Short report:

• I have a netcdf file that is not specially big (around 1.6GB)
• When I try to fully open one of its variables, it crashes, ie this crashes:

```

for some reason, this does not work; crash

xr_file["accD"][0, 0:3235893].data ```

but opening in several passes works, i.e. this works:

xr_file["accD"][0, 1000000:2000000].data xr_file["accD"][0, 2000000:3000000].data xr_file["accD"][0, 3000000:3235893].data

Any idea why?

What did you expect to happen?

Opening the variable in full should work.

Minimal Complete Verifiable Example

https://github.com/jerabaul29/misc/blob/main/BugReports/OpeningIssueXarray/issue_opening_2018_03_b.ipynb

MVCE confirmation

• [x] Minimal example — the example is as focused as reasonably possible to demonstrate the underlying issue in xarray.
• [x] Complete example — the example is self-contained, including all data and the text of any traceback.
• [x] Verifiable example — the example copy & pastes into an IPython prompt or Binder notebook, returning the result.
• [x] New issue — a search of GitHub Issues suggests this is not a duplicate.

Relevant log output

No response

Anything else we need to know?

The netcdf file uses unlimited dimensions, can this be a problem? I am not the author of the file, but I think it was generated from some Matlab netCDF package.

Environment

Ubuntu 20.04, python 3.8.10, xarray 0.20.2.