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Add a note on replication factor value (#3348) 

* Add a note on replication factor value

We've got a bug [1] report for a misconfiguration of
`default.topic.replication.factor`.
This PR adds a note that could alert users on the
value of this configuration.

[1] https://github.com/knative-sandbox/eventing-kafka-broker/issues/720

* Update docs/eventing/broker/kafka-broker.md

Co-authored-by: Ashleigh Brennan <40172997+abrennan89@users.noreply.github.com>

Co-authored-by: Ashleigh Brennan <40172997+abrennan89@users.noreply.github.com>
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Pierangelo Di Pilato 2021-03-16 00:00:41 +01:00 committed by GitHub
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@ -105,6 +105,8 @@ The above `ConfigMap` is installed in the cluster. You can edit
the configuration or create a new one with the same values
depending on your needs.
**NOTE:** The `default.topic.replication.factor` value must be less than or equal to the number of Kafka broker instances in your cluster. For example, if you only have one Kafka broker, the `default.topic.replication.factor` value should not be more than `1`.
## Set as default broker implementation
To set the Kafka broker as the default implementation for all brokers in the Knative deployment,