DOCS-10539 geoNear and distinct may return orphans

Author: kevinAlbs

source/reference/command/distinct.txt

@@ -48,6 +48,9 @@ Definition
 Behavior
 --------
 
+In a :term:`sharded cluster`, the :dbcommand:`distinct` command may return
+:term:`orphaned documents <orphaned document>`.
+
 .. _distinct-command-array-behavior:
 
 Array Fields

source/reference/command/geoNear.txt

@@ -107,6 +107,10 @@ The :dbcommand:`geoNear` command provides an alternative to the
 :query:`$near`, :dbcommand:`geoNear` returns additional diagnostic
 information.
 
+In a :term:`sharded cluster`, the :dbcommand:`geoNear` command may return
+:term:`orphaned documents <orphaned document>`. To avoid this, consider
+using the :pipeline:`$geoNear` aggregation stage as an alternative.
+
 .. read-lock, slave-ok
 
 Examples

source/reference/method/db.collection.distinct.txt

@@ -39,6 +39,9 @@ Options
 Behavior
 --------
 
+In a :term:`sharded cluster`, the :dbcommand:`distinct` command may return
+:term:`orphaned documents <orphaned document>`.
+
 .. _distinct-method-behavior-array:
 
 Array Fields