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-rw-r--r--release_docs/RELEASE.txt12
1 files changed, 12 insertions, 0 deletions
diff --git a/release_docs/RELEASE.txt b/release_docs/RELEASE.txt
index 3251577..024d76b 100644
--- a/release_docs/RELEASE.txt
+++ b/release_docs/RELEASE.txt
@@ -776,6 +776,18 @@ SuSe Linux 2.6.5
Known Problems
==============
+* While working on the 1.8.6 release of HDF5, a bug was discovered that can
+ occur when reading from a dataset in parallel shortly after it has been
+ written to collectively. The issue was exposed by a new test in the parallel
+ HDF5 test suite, but had existed before that. We believe the problem lies with
+ certain MPI implementations and/or filesystems.
+
+ We have provided a pure MPI test program, as well as a standalone HDF5
+ program, that can be used to determine if this is an issue on your system.
+ They should be run across multiple nodes with a varying number of processes.
+ These programs can be found at:
+ http://www.hdfgroup.org/ftp/HDF5/examples/known_problems/
+
* Parallel mode in AIX will fail some of the testcheck_version.sh tests where
it treats "exit(134) the same as if process 0 had received an abort signal.
This is fixed and will be available in the next release. AKC - 2009/11/3