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Diffstat (limited to 'release_docs/RELEASE.txt')
| -rw-r--r-- | release_docs/RELEASE.txt | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/release_docs/RELEASE.txt b/release_docs/RELEASE.txt index ef3bda0..316798d 100644 --- a/release_docs/RELEASE.txt +++ b/release_docs/RELEASE.txt @@ -264,6 +264,22 @@ Bug Fixes since HDF5-1.10.3 release Library ------- + - Fix hangs with collective metadata reads during chunked dataset I/O + + In the parallel library, it was discovered that when a particular + sequence of operations following a pattern of: + + "write to chunked dataset" -> "flush file" -> "read from dataset" + + occurred with collective metadata reads enabled, hangs could be + observed due to certain MPI ranks not participating in the collective + metadata reads. + + To fix the issue, collective metadata reads are now disabled during + chunked dataset raw data I/O. + + (JTH - 2019/02/11, HDFFV-10563, HDFFV-10688) + - Performance issue when closing an object The slow down is due to the search of the "tag_list" to find |