> For the complete documentation index, see [llms.txt](https://docs.onum.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.onum.com/listeners-changelog/apache-kafka-listener.md).

# Apache Kafka Listener

Learn more about this Listener type in [this article](/listeners/listener-integrations/collect-data-from-apache-kafka.md).

<details>

<summary>v2.1.3</summary>

<mark style="background-color:purple;">**Released on**</mark> <mark style="background-color:purple;"></mark><mark style="background-color:purple;">06/11/2026</mark>

* Fixed messages incorrectly routed to the error port based on payload size.
* Fixed the Listener getting permanently stuck on the error port after a transient broker connect failure. A cached connect error is now cleared on the next successful reconnect.

</details>

<details>

<summary>v2.1.2</summary>

<mark style="background-color:purple;">**Released on**</mark> <mark style="background-color:purple;"></mark><mark style="background-color:purple;">01/28/2026</mark>

Fixed an error that created a Kafka client when the Listener was disabled.

</details>

<details>

<summary>v2.1.1</summary>

<mark style="background-color:purple;">**Released on**</mark> <mark style="background-color:purple;"></mark><mark style="background-color:purple;">12/05/2025</mark>

Improvements in error management.

</details>

<details>

<summary>v2.1.0</summary>

<mark style="background-color:purple;">**Released on**</mark> <mark style="background-color:purple;"></mark><mark style="background-color:purple;">10/22/2025</mark>

New error port added for when the Environment Variable is not enabled in the distributor. In order to use this Listener, you must activate the following environment variable in your distributor using docker compose: `SINGLETON_LISTENER_EXECUTOR=true`

</details>

<details>

<summary>v2.0.0</summary>

<mark style="background-color:purple;">**Released on**</mark> <mark style="background-color:purple;"></mark><mark style="background-color:purple;">06/18/2025</mark>

Added SCRAM auth type.

</details>

<details>

<summary>v1.0.0</summary>

<mark style="background-color:purple;">**Released on**</mark> <mark style="background-color:purple;"></mark><mark style="background-color:purple;">04/09/2025</mark>

Initial version.

</details>