Maybe it could of interest for users as well.
Paolo Patierno Senior Software Engineer (IoT) @ Red Hat Microsoft MVP on Windows Embedded & IoT Microsoft Azure Advisor Twitter : @ppatierno<http://twitter.com/ppatierno> Linkedin : paolopatierno<http://it.linkedin.com/in/paolopatierno> Blog : DevExperience<http://paolopatierno.wordpress.com/> ________________________________ From: Paolo Patierno <ppatie...@live.com> Sent: Wednesday, September 13, 2017 11:40 AM To: d...@kafka.apache.org Subject: Admin Client : no way to create topic with default partitions and replication factor Hi devs, taking a look at the Admin Client API and the related implementation it seems that : * the CreateTopics request allows you to have "num_partitions" and "replication_factor" with -1 as value (it means unset) which is used when you specify the "replica_assignment" instead * the NewTopic available constructor doesn't allow you to use such a feature. Even trying to pass null as "replicaAssignments" throws an exception because a collection is built there. I think that it could be useful from an administrative point of view having this possibility as it already happens when you have auto creation enabled and a topic is created with default partitions and replicas when a consumer/producer asks for metadata (and the topic doesn't exist). Of course this proposal needs a KIP because we are changing the Admin Client API (but not breaking). Other than a change in the admin client side it will need a change in the broker as well because the current path (when a create topic request comes) doesn't handle the -1 values for "num_partitions" and "replication_factor", so it needs to set default values in this case. What do you think about that ? Thanks. Paolo Patierno Senior Software Engineer (IoT) @ Red Hat Microsoft MVP on Windows Embedded & IoT Microsoft Azure Advisor Twitter : @ppatierno<http://twitter.com/ppatierno> Linkedin : paolopatierno<http://it.linkedin.com/in/paolopatierno> Blog : DevExperience<http://paolopatierno.wordpress.com/>
