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Diffstat (limited to 'release_docs')
| -rw-r--r-- | release_docs/RELEASE.txt | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/release_docs/RELEASE.txt b/release_docs/RELEASE.txt index 579308c..516010f 100644 --- a/release_docs/RELEASE.txt +++ b/release_docs/RELEASE.txt @@ -199,6 +199,24 @@ Bug Fixes since HDF5-1.10.2 release Library ------- + - A bug was discovered in the parallel library where an application + would hang if a collective read/write of a chunked dataset occurred + when collective metadata reads were enabled and some of the ranks + had no selection in the dataset's dataspace. The ranks which had no + selection in the dataset's dataspace called H5D__chunk_addrmap() to + retrieve the lowest chunk address in the dataset. This is because we + require reads/writes to be performed in strictly non-decreasing order + of chunk address in the file. + + When the chunk index used was a version 1 or 2 B-tree, these + non-participating ranks would issue a collective MPI_Bcast() call + that the participating ranks would not issue, causing the hang. Since + the non-participating ranks are not actually reading/writing anything, + the H5D__chunk_addrmap() call can be safely removed and the address used + for the read/write can be set to an arbitrary number (0 was chosen). + + (JTH - 2018/08/25, HDFFV-10501) + - Java HDF5LibraryException class The error minor and major values would be lost after the |