PendingReleaseNotes: add release note for 62338

See https://tracker.ceph.com/issues/62338 and
2fc5486e.

Signed-off-by: Samuel Just <sjust@redhat.com>
(cherry picked from commit dfb4b26a715bf2cc20e116c9bee4dad507383f3b)

Conflicts:
   PendingReleaseNotes
- Moved note under ">=17.2.7" section

diff --git a/PendingReleaseNotes b/PendingReleaseNotes
index f6bdf4dcc9d8dd9d90289ba9f18f88958093971d..6c2519998ba81c3db0ff9d2e80134f1d4171d3e8 100644 (file)
--- a/PendingReleaseNotes
+++ b/PendingReleaseNotes
@@ -67,6 +67,14 @@
   "mgr/prometheus/x/server_port" will be displayed instead of
   "mgr/prometheus/server_port". This matches the output of the non pretty-print
   formatted version of the command.
+* RADOS: For bug 62338 (https://tracker.ceph.com/issues/62338), we did not choose
+  to condition the fix on a server flag in order to simplify backporting.  As
+  a result, in rare cases it may be possible for a PG to flip between two acting
+  sets while an upgrade to a version with the fix is in progress.  If you observe
+  this behavior, you should be able to work around it by completing the upgrade or
+  by disabling async recovery by setting osd_async_recovery_min_cost to a very
+  large value on all OSDs until the upgrade is complete:
+  ``ceph config set osd osd_async_recovery_min_cost 1099511627776``
 
 >=17.2.6
 --------