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https://issues.apache.org/jira/browse/KAFKA-14941?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17780554#comment-17780554
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Jakub Scholz commented on KAFKA-14941:
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The idea with which I opened it was to:
* Have it documented in the first place
* If it is done in the Java code in the same way as for example the current
flag indicating whether an option is read-only or not, it would be a plus as
that can be used in other applications as well.
> Document which configuration options are applicable only to processes with
> broker role or controller role
> ---------------------------------------------------------------------------------------------------------
>
> Key: KAFKA-14941
> URL: https://issues.apache.org/jira/browse/KAFKA-14941
> Project: Kafka
> Issue Type: Improvement
> Reporter: Jakub Scholz
> Priority: Major
>
> When running in KRaft mode, some of the configuration options are applicable
> only to nodes with the broker process role and some are applicable only to
> the nodes with the controller process roles. It would be great if this
> information was part of the documentation (e.g. in the [Broker
> Configs|https://kafka.apache.org/documentation/#brokerconfigs] table on the
> website), but if it was also part of the config classes so that it can be
> used in situations when the configuration is dynamically configured to for
> example filter the options applicable to different nodes. This would allow
> having configuration files with only the actually used configuration options
> and for example, help to reduce unnecessary restarts when rolling out new
> configurations etc.
> For some options, it seems clear and the Kafka node would refuse to start if
> they are set - for example the configurations of the non-controler-listeners
> in controller-only nodes. For others, it seems a bit less clear (Does
> {{compression.type}} option apply to controller-only nodes? Or the
> configurations for the offset topic? etc.).
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