Hi Anton, I have a quick question: how does this setting interact with auto.create.topics.enable? If I set internal.topics.creation=false while auto.create.topics.enable is true, will the Connect internal topic still be created automatically?
Best, Kuan-Po Tseng On 2025/09/02 08:44:27 Anton Liauchuk wrote: > Hi, > > I finalized the implementation https://github.com/apache/kafka/pull/20384: > if auto-creation of topics is disabled, an exception is thrown when a > required topic does not exist. If the topic exists, there is an additional > validation to ensure that it has the correct cleanup policy. > > Please review the KIP > https://cwiki.apache.org/confluence/display/KAFKA/KIP-1209%3A+Add+configuration+to+control+internal+topic+creation+in+Kafka+Connect > and PR. I’ll start the voting if there are no concerns > > On Tue, Aug 26, 2025 at 4:58 PM Anton Liauchuk <anton93...@gmail.com> wrote: > > > Hello everyone > > > > I'd like to discuss a KIP > > https://cwiki.apache.org/confluence/display/KAFKA/KIP-1209%3A+Add+configuration+to+control+internal+topic+creation+in+Kafka+Connect > > > > small POC with discussion: https://github.com/apache/kafka/pull/20384 > > > > Motivation: > > > > Kafka Connect requires several internal topics (config, offsets, and > > status) for storing connector metadata and state. By default, these topics > > are automatically created by the worker if they are missing. > > However, in some scenarios this behavior can be problematic: > > - internal topics may already contain information about a large number of > > connectors. > > - if one or more of the original topics are accidentally removed or > > renamed, Kafka Connect will create them silently. > > - this can lead to unexpected states — e.g., if the config topic exists > > but the offsets topic was removed, all connectors may start from scratch. > > We are going to introduce safer mode where Kafka Connect fails fast > > instead of silently creating new topics, allowing to troubleshoot > > misconfigurations and prevent accidental data loss or resets. > > > > Thank you! > > >
