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DOCS-14182 clarify retryable writes default #4914

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Feb 10, 2021
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DOCS-14182 clarify retryable writes default #4914

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12 changes: 9 additions & 3 deletions source/includes/extracts-4.2-changes.yaml
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Expand Up @@ -704,9 +704,15 @@ content: |
---
ref: 4.2-changes-drivers-retryWrites-default
content: |
The official MongoDB 3.6 and 4.0-compatible drivers required including the
:urioption:`retryWrites=true <retryWrites>` option in the :ref:`connection
string <mongodb-uri>` to enable retryable writes for that connection.
MongoDB 3.6 introduced support for :ref:`retryable-writes`, but most
official MongoDB 3.6 and 4.0-compatible drivers disabled this feature
by default. For such drivers, retryable writes could be enabled per
connection by including the :urioption:`retryWrites=true
<retryWrites>` option in the :ref:`connection string <mongodb-uri>`
for that connection. Refer to the `MongoDB Driver Documentation
<https://docs.mongodb.com/drivers/?tck=docs_server>`_ to determine
the correct default state of :urioption:`retryWrites` for your
specific driver and version.

The official MongoDB 4.2-compatible drivers enable :ref:`retryable-writes` by
default. Applications upgrading to the 4.2-compatible drivers that require
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