Consuming messages sent with v3 API results in an empty array when using v2 API

[rasert]

I noticed that if I send a message using the rest proxy v3 API, I can't consume it using the v2 API. I always get an empty array no matter how many times I send the request.

I am working with AVRO. When producing the message through v3 api, I set the Content-Type to application/json and set AVRO in the value.type property of the body.

When consuming, I create a consumer with format = avro and I set Accept and Content-Type to "application/vnd.kafka.avro.v2+json" in subsequent requests.

I am running locally with docker compose.

• Rest proxy is v7.1.1;
• Schema Registry is v5.1.2;
• Kafka is v5.1.2;
• Zookeeper is v5.1.2;

[dimitarndimitrov]

@rasert Thank you for reporting this!

When you say "Rest proxy is v7.1.1" does that indicate the v7.1.1 tag from this repo?

When you say "Kafka is v5.1.2", does that indicate a Confluent Platform version? The same question also applies for Schema Registry.

• Apache Kafka is currently at version 3.2.0, so the above doesn't seem to be an AK version.
• Apache ZooKeeper is currently at version 3.8.0, and I don't think there's a Confluent Platform version for it, so I don't understand what "Zookeeper is v5.1.2" means - can you please clarify that as well?

I will wait for your response on these, but in case 5.1.x is a Confluent Platform version:

• 5.1.x is an old, no longer supported version (see https://docs.confluent.io/platform/current/installation/versions-interoperability.html).
• The Kafka REST v7.1.1 tag relates to Confluent Platform versioning. Do you have access to Confluent Platform with the same (or at least much closer to that than 5.1.2) version? Can you rerun your experiment then?