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Added information re: mpich version 4.2.0 and related 'error' messages. #3023

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Sep 12, 2024
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Added information re: mpich version 4.2.0 and related 'error' messages. #3023

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8 changes: 8 additions & 0 deletions RELEASE_NOTES.md
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Expand Up @@ -7,6 +7,14 @@ This file contains a high-level description of this package's evolution. Release

## 4.9.3 - TBD

## Known Issue

* Parallel operation using `mpich 4.2.0` (the default on `Ubuntu 24.04`) results in 'unexpected results' when running `nc_test4/run_par_test.sh`. This can be fixed by removing `mpich` and associated libraries and development packages and installing `mpich 4.2.2` by hand, or by using `openmpi` provided via `apt`.

## Release Notes

### Release Candidate 2 - TBD

* Provide better documentation for the .rc file mechanism and API. See [Github #2956](https://github.com/Unidata/netcdf-c/pull/2956) for more information.
* Convert NCZarr V2 to store all netcdf-4 specific info as attributes. This improves interoperability with other Zarr implementations by no longer using non-standard keys. The price to be paid is that lazy attribute reading cannot be supported. See [Github #2836](https://github.com/Unidata/netcdf-c/pull/2936) for more information.
* Cleanup the option code for NETCDF_ENABLE_SET_LOG_LEVEL\[_FUNC\] See [Github #2931](https://github.com/Unidata/netcdf-c/pull/2931) for more information.
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