From 1973d867c84f34ada4d361126b75bc485a69609d Mon Sep 17 00:00:00 2001
From: Dana Robinson <43805+derobins@users.noreply.github.com>
Date: Fri, 23 Dec 2022 12:10:25 -0800
Subject: Updated RELEASE.txt with known MPI problems (#2359)

---
 release_docs/RELEASE.txt | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/release_docs/RELEASE.txt b/release_docs/RELEASE.txt
index fcf94f8..ebdd2e8 100644
--- a/release_docs/RELEASE.txt
+++ b/release_docs/RELEASE.txt
@@ -2158,6 +2158,25 @@ Known Problems
        *                                                          *
        ************************************************************
 
+    There is a bug in OpenMPI 4.1.0-4.1.4 that can result in incorrect
+    results from MPI I/O requests unless one of the following parameters
+    is passed to mpirun:
+
+        --mca io ^ompio
+
+        --mca fbtl_posix_read_data_sieving 0
+
+    This bug has been fixed in later versions of OpenMPI.
+
+    Further discussion can be found here:
+
+    https://www.hdfgroup.org/2022/11/workarounds-for-openmpi-bug-exposed-by-make-check-in-hdf5-1-13-3/
+
+    There is a bug in MPICH 4.0.0-4.0.3 where using device=ch4:ofi (the default)
+    can cause failures in the testphdf5 test program. Using ch4:ucx or ch3
+    allows the test to pass. The bug appears to be fixed in the upcoming 4.1
+    release.
+
     The accum test fails on MacOS 12.6.2 (Monterey) with clang 14.0.0. The
     reason for this failure and its impact are unknown.
 
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