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https://issues.apache.org/jira/browse/KAFKA-12811?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17347257#comment-17347257
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Luke Chen commented on KAFKA-12811:
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[~rjoerger], I've helped you move this ticket into "patch available"
> kafka-topics.sh should let the user know they cannot adjust the replication
> factor for a topic using the --alter flag and not warn about missing the
> --partition flag
> ---------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: KAFKA-12811
> URL: https://issues.apache.org/jira/browse/KAFKA-12811
> Project: Kafka
> Issue Type: Improvement
> Components: admin
> Reporter: Richard Joerger
> Priority: Trivial
>
> Currently the kafka-topics.sh tool will return the following message when
> trying to alter the replication factor for a topic:
>
> {code:java}
> $ ./bin/kafka-topics.sh --bootstrap-server
> {code}
> _host_
> {code:java}
> :9092 --alter --topic testTopic --replication-factor 4
> 21/05/18 13:23:54 INFO utils.Log4jControllerRegistration$: Registered
> kafka:type=kafka.Log4jController MBean
> Missing required argument "[partitions]"
> {code}
> But, what I believe it should do, since the appropriate way to adjust
> replication factor is to use the kafka-reassign-partitions tool should be to
> let the user know that this is not the appropriate way to adjust the
> replication factor. It would look like this:
> {code:java}
> $ ./bin/kafka-topics.sh --bootstrap-server
> {code}
> _host_
> {code:java}
> :9092 --alter --topic testTopic --replication-factor 4
> Option "[replication-factor]" can't be used with option "[alter]"{code}
> Very minor improvement but should help alleviate what seems a little
> unintuitive to some.
>
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