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DOCS-14644-assert CWWC is set on server start | DOCS-14643 on sh.add… #6146

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Nov 16, 2021
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DOCS-14644-assert CWWC is set on server start | DOCS-14643 on sh.add… #6146

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12 changes: 12 additions & 0 deletions source/includes/fact-5.1-fassert-shard-restart-add-CWWC.rst
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@@ -0,0 +1,12 @@
Starting in MongoDB 5.1, when starting, restarting or adding a
:doc:`shard server</sharding>` with :method:`sh.addShard()` the
:ref:`Cluster Wide Write Concern (CWWC) <set_global_default_write_concern>`
must be set.

If the ``CWWC`` is not set and the shard is configured
such that the :ref:`default write concern <write-concern>` is
``{ w : 1 }`` the shard server will fail to start or be added
and returns an error.

See :ref:`default write concern calculations <default-wc-formula>` for
details on how the default write concern is calculated.
2 changes: 2 additions & 0 deletions source/reference/mongodb-defaults.txt
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Expand Up @@ -215,6 +215,8 @@ Write Concern
:alt: Read/Write Concern Inheritance
:figwidth: 500px

.. _default-wc-formula:

Default Write Concern
~~~~~~~~~~~~~~~~~~~~~

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5 changes: 5 additions & 0 deletions source/release-notes/5.1-compatibility.txt
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Expand Up @@ -52,6 +52,11 @@ Shell Changes
Replica Sets
------------

Assert Cluster Wide Write Concern is Set When Starting or Adding Shard
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. include:: /includes/fact-5.1-fassert-shard-restart-add-CWWC.rst

``rs.reconfig`` Cluster Wide Write Concern Validation
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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5 changes: 5 additions & 0 deletions source/release-notes/5.1.txt
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Expand Up @@ -137,6 +137,11 @@ For an example, see :ref:`validation-description-example`.
Replica Sets
------------

Assert Cluster Wide Write Concern is Set When Starting or Adding Shard
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. include:: /includes/fact-5.1-fassert-shard-restart-add-CWWC.rst

``rs.reconfig`` Cluster Wide Write Concern Validation
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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2 changes: 2 additions & 0 deletions source/sharding.txt
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Expand Up @@ -237,6 +237,8 @@ a :ref:`broadcast operation <sharding-mongos-broadcast>`, querying
*all* shards in the sharded cluster. These scatter/gather queries can
be long running operations.

.. include:: /includes/fact-5.1-fassert-shard-restart-add-CWWC.rst

.. note::

If you have an active support contract with MongoDB, consider contacting
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