Why axon-kafka-4.0-RC3 remove KafkaProperties groupid property?

hello,please answer my questions ?
when i use axon-kafka-4.0-RC3, Configuration group id invaild, i want to fixed group id,
It’s not fixed group id.
like this:Axon.Streamable.Consumer-153a129e-ac3b-43db-9110-5bcc84b64999image

The properties on paths axon.kafka, axon.kafka.consumer and axon.kafka.producer resemble key-value pairs. So from an implementation perspective, you are looking at a Map. Due to this, the keys aren’t known up front so are no described through javadoc either.
Know that the properties folders are intended to provide any Kafka specific configuration which are not opened up through distinct keys.

The groupId property you are mentioning has however been removed for quite sometime know, which required me to dig in a little too. I tracked it towards this commit message. So more specifically, there is no means to define a default groupId anymore, as the structure of the extension has changed.

Right now the implementation will need to provide the groupId when setting up the consumer (as specified in this) commit message. From your end this means you will need to provide the groupId when you create the message source for an Event Processor. How this is done, can be found in the Reference Guide on this page.

By the way, we introduced this breaking change as the Kafka Extension has no seen a final release yet (as specified with RC, Release Candidate). I am not anticipating any major breaking changes for the following release though.

Trusting this helps you out sufficiently @Vinson!

Cheers,
Steven

Are there any examples? The documentation is not very readable

The extension-kafka has an example app inside it, check it out.

If any portion of the documentation is unclear, providing suggested adjustments would be more than welcome actually. You can simply draft up an issue, favorably a pull request actually, over here.

When drafting that page we felt everything was provided sufficiently enough.
However apparently you’ve found some missing pointers here, so your insights would be much appreciated on the matter too. Hope to see a PR from you soon @Vinson :slight_smile:

First of all, thanks for your help. :grinning:
Use this framework for the first time, It’s hard to avoid some confusion, hope you will understand.
One more question. Help me out.
Query side multi server consumer kafka message,How to code and set?Is the subscribing mode ?how?

application.properties:
axon.eventhandling.processors.kafka-group.mode=subscribing
axon.kafka.client-id=@axon.kafka.client-id@
axon.kafka.default-topic=@axon.kafka.default-topic@
axon.kafka.consumer.bootstrap-servers=@axon.kafka.consumer.bootstrap-servers@
axon.kafka.consumer.event-processor-mode=subscribing
axon.kafka.consumer.auto-offset-reset=earliest
axon.distributed.enabled=true