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-rw-r--r--release_docs/RELEASE.txt7
-rw-r--r--src/H5Dchunk.c28
2 files changed, 28 insertions, 7 deletions
diff --git a/release_docs/RELEASE.txt b/release_docs/RELEASE.txt
index c5f2e6a..fbdbf3f 100644
--- a/release_docs/RELEASE.txt
+++ b/release_docs/RELEASE.txt
@@ -1039,6 +1039,13 @@ Bug Fixes since HDF5-1.12.0 release
===================================
Library
-------
+ - 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
+ simple cases of H5Dcreate() -> H5Dwrite() -> H5Dcreate().
+
+ (JTH - 2021/11/08, HDFFV-11090)
+
- Fixed cross platform incompatibility of references within variable length
types
diff --git a/src/H5Dchunk.c b/src/H5Dchunk.c
index 9a9121a..8d32744 100644
--- a/src/H5Dchunk.c
+++ b/src/H5Dchunk.c
@@ -3166,11 +3166,14 @@ H5D__chunk_hash_val(const H5D_shared_t *shared, const hsize_t *scaled)
herr_t
H5D__chunk_lookup(const H5D_t *dset, const hsize_t *scaled, H5D_chunk_ud_t *udata)
{
- H5D_rdcc_ent_t * ent = NULL; /* Cache entry */
- H5O_storage_chunk_t *sc = &(dset->shared->layout.storage.u.chunk);
- unsigned idx = 0; /* Index of chunk in cache, if present */
- hbool_t found = FALSE; /* In cache? */
- herr_t ret_value = SUCCEED; /* Return value */
+ H5D_rdcc_ent_t * ent = NULL; /* Cache entry */
+ H5O_storage_chunk_t *sc = &(dset->shared->layout.storage.u.chunk);
+ unsigned idx = 0; /* Index of chunk in cache, if present */
+ hbool_t found = FALSE; /* In cache? */
+#ifdef H5_HAVE_PARALLEL
+ hbool_t reenable_coll_md_reads = FALSE;
+#endif
+ herr_t ret_value = SUCCEED; /* Return value */
FUNC_ENTER_PACKAGE
@@ -3241,8 +3244,13 @@ H5D__chunk_lookup(const H5D_t *dset, const hsize_t *scaled, H5D_chunk_ud_t *udat
* highly unlikely that users would read the same chunks from all
* processes.
*/
- if (H5F_HAS_FEATURE(idx_info.f, H5FD_FEAT_HAS_MPI))
- H5CX_set_coll_metadata_read(FALSE);
+ if (H5F_HAS_FEATURE(idx_info.f, H5FD_FEAT_HAS_MPI)) {
+ hbool_t do_coll_md_reads = H5CX_get_coll_metadata_read();
+ if (do_coll_md_reads) {
+ H5CX_set_coll_metadata_read(FALSE);
+ reenable_coll_md_reads = TRUE;
+ }
+ }
#endif /* H5_HAVE_PARALLEL */
/* Go get the chunk information */
@@ -3285,6 +3293,12 @@ H5D__chunk_lookup(const H5D_t *dset, const hsize_t *scaled, H5D_chunk_ud_t *udat
} /* end else */
done:
+#ifdef H5_HAVE_PARALLEL
+ /* Re-enable collective metadata reads if we disabled them */
+ if (reenable_coll_md_reads)
+ H5CX_set_coll_metadata_read(TRUE);
+#endif /* H5_HAVE_PARALLEL */
+
FUNC_LEAVE_NOAPI(ret_value)
} /* H5D__chunk_lookup() */