DOCSP-16202 reconfigs that would change the implicit default write concern require that a prior cluster-wide write concern be set

Author: jmd-mongo

source/includes/fact-set-global-write-concern-before-reconfig.rst

@@ -0,0 +1,6 @@
+Starting in MongoDB 5.0, you must explicitly set the global default
+:ref:`write concern <write-concern>` before attempting to reconfigure a
+:term:`replica set <replica set>` with a 
+:doc:`configuration </reference/replica-configuration>` 
+that would change the implicit default write concern. To set the global
+default write concern, use the :dbcommand:`setDefaultRWConcern` command.

source/reference/command/replSetReconfig.txt

@@ -72,6 +72,11 @@ replSetReconfig
 Behavior
 --------
 
+Global Write Concern
+~~~~~~~~~~~~~~~~~~~~
+
+.. include:: /includes/fact-set-global-write-concern-before-reconfig.rst
+
 ``term`` Replica Configuration Field
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 

source/reference/method/rs.reconfig.txt

@@ -96,6 +96,11 @@ Definition
 Behavior
 --------
 
+Global Write Concern
+~~~~~~~~~~~~~~~~~~~~
+
+.. include:: /includes/fact-set-global-write-concern-before-reconfig.rst
+
 ``term`` Replica Configuration Field
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 

source/release-notes/5.0-compatibility.txt

@@ -288,6 +288,8 @@ General Changes
   currently logged in as an existing user will write a warning to the 
   log once per authentication attempt.
 
+- .. include:: /includes/fact-set-global-write-concern-before-reconfig.rst
+
 Deprecations
 ~~~~~~~~~~~~