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authorQuincey Koziol <koziol@hdfgroup.org>2002-06-01 03:09:59 (GMT)
committerQuincey Koziol <koziol@hdfgroup.org>2002-06-01 03:09:59 (GMT)
commit3d8696ae55cbefed0ed1a39747ec37752628da16 (patch)
treef4089d1ca65c5d05b5d34d34f91e85d266d91cc4
parentdfe2b45ee1727fab82127e1890917e2d7d7c25c9 (diff)
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[svn-r5500] Purpose:
Document Bug Fix Description: Under certain [obscure] circumstances, an object header would get paged out of the metadata cache, and when it was accessed again and brought back into the cache, and immediately had additional metadata added to it (an attribute, usually, or perhaps adding an object to a group), and needed to be extended with a continuation message, but there was no room in any existing object header chunks for the continuation message and an existing object header message needed to be moved to the new object header chunk (I told you it was obscure :-), the object header message moved to the new chunk (not the new metadata being added) would get corrupted. *whew* :-) Solution: Actually copy the "raw" object header message information of the object header message being moved to the new chunk, instead of relying on the "native" object header message information being re-encoded when the object header is flushed. This is because when an object header is paged out of the metadata cache and subsequently brought back in, the "native" information pointer in memory is reset to NULL and only the "raw" information exists. Platforms tested: Solaris 2.7 (arabica) & FreeBSD 4.5 (sleipnir)
-rw-r--r--release_docs/RELEASE.txt4
1 files changed, 3 insertions, 1 deletions
diff --git a/release_docs/RELEASE.txt b/release_docs/RELEASE.txt
index 4fab066..95475e9 100644
--- a/release_docs/RELEASE.txt
+++ b/release_docs/RELEASE.txt
@@ -30,12 +30,14 @@ CONTENTS
- Platforms Tested
- Known Problems
-Bug Fixes since HDF5-1.4.2
+Bug Fixes since HDF5-1.4.0
==========================
Library
-------
+ * Fixed bug where an object's header could get corrupted in certain obscure
+ situations where many objects were created in the file. QAK - 2002/05/31
* Fixed bug where read/write intent in file IDs created with H5Freopen
was not being kept the same as the original file. QAK - 2002/05/14
* Fixed bug where selection offsets were not being used when iterating