PendingReleaseNotes: warning about 'osd rm ...' and #19119

See http://tracker.ceph.com/issues/19119

Signed-off-by: Sage Weil <sage@redhat.com>

diff --git a/PendingReleaseNotes b/PendingReleaseNotes
index 6386dd9770fa5c7c8ccc424399f29fbe39196ac7..f4718eb179f10c3f0c9d17e93f2cfff41964e66c 100644 (file)
--- a/PendingReleaseNotes
+++ b/PendingReleaseNotes
@@ -121,3 +121,15 @@
 * The 'rados df' JSON output now prints numeric values as numbers instead of
   strings.
 
+* There was a bug introduced in Jewel (#19119) that broke the mapping behavior
+  when an "out" OSD that still existed in the CRUSH map was removed with 'osd rm'.
+  This could result in 'misdirected op' and other errors.  The bug is now fixed,
+  but the fix itself introduces the same risk because the behavior may vary between
+  clients and OSDs.  To avoid problems, please ensure that all OSDs are removed
+  from the CRUSH map before deleting them.  That is, be sure to do::
+
+     ceph osd crush rm osd.123
+
+  before::
+
+     ceph osd rm osd.123