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| author | jhendersonHDF <jhenderson@hdfgroup.org> | 2022-01-22 14:40:33 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2022-01-22 14:40:33 (GMT) |
| commit | 99d3962a831167298ebc087f0b8e8b6209034d95 (patch) | |
| tree | 5c879275551180b76d0b14be52cdbf0a1b98ad8c /release_docs | |
| parent | d45124d7085de2771c0157f5d48d71b21a10de1f (diff) | |
| download | hdf5-99d3962a831167298ebc087f0b8e8b6209034d95.zip hdf5-99d3962a831167298ebc087f0b8e8b6209034d95.tar.gz hdf5-99d3962a831167298ebc087f0b8e8b6209034d95.tar.bz2 | |
Parallel rank0 deadlock fixes (#1183)
* Fix several places where rank 0 can skip past collective MPI operations on failure
* Committing clang-format changes
Co-authored-by: github-actions <41898282+github-actions[bot]@users.noreply.github.com>
Diffstat (limited to 'release_docs')
| -rw-r--r-- | release_docs/RELEASE.txt | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/release_docs/RELEASE.txt b/release_docs/RELEASE.txt index d059fb3..bba27c9 100644 --- a/release_docs/RELEASE.txt +++ b/release_docs/RELEASE.txt @@ -1083,6 +1083,18 @@ Bug Fixes since HDF5-1.12.0 release (DER - 2021/11/23, HDFFV-11286) + - Fixed several potential MPI deadlocks in library failure conditions + + In the parallel library, there were several places where MPI rank 0 + could end up skipping past collective MPI operations when some failure + occurs in rank 0-specific processing. This would lead to deadlocks + where rank 0 completes an operation while other ranks wait in the + collective operation. These places have been rewritten to have rank 0 + push an error and try to cleanup after the failure, then continue to + participate in the collective operation to the best of its ability. + + (JTH - 2021/11/09) + - Fixed an issue with collective metadata reads being permanently disabled after a dataset chunk lookup operation. This would usually cause a mismatched MPI_Bcast and MPI_ERR_TRUNCATE issue in the library for |