Merge pull request #2285 from aiven/inc-623-kstream-customer-facing-m…

…essage

customer facing recommendation to prevent KStream data write issue

_toc.yml

@@ -433,6 +433,8 @@ entries:
             title: Advanced parameters
           - file: docs/products/kafka/reference/kafka-metrics-prometheus
             title: Metrics available via Prometheus
+          - file: docs/products/kafka/reference/kstream-data-write-issue
+            title: Resolving Data Write Issues with Kafka Streams 3.6.0
 
       - file: docs/products/kafka/kafka-connect
         title: Apache Kafka Connect

docs/products/kafka/reference/kstream-data-write-issue.rst

@@ -0,0 +1,21 @@
+Resolving data write issue on Apache Kafka® Streams 3.6.0
+=========================================================
+
+Issue description
+------------------
+If you are encountering an ``UNKNOWN_SERVER_ERROR`` while producing data using Apache Kafka® Streams version 3.6.0, it may result in the prevention of data writing. This issue has been identified and logged in the Apache Kafka® project's issue tracker with the reference: `Kafka-15653 <https://issues.apache.org/jira/browse/KAFKA-15653>`_.
+
+This could lead to errors in broker logs as,
+
+.. code-block:: bash
+
+    "Error processing append operation on partition XXXX (kafka.server.ReplicaManager) java.lang.NullPointerException."
+
+
+Solution
+--------
+To address this issue, it is recommended to upgrade your Apache Kafka® Streams clients to version 3.6.1. This version contains the necessary fixes to resolve the ``UNKNOWN_SERVER_ERROR``.
+
+
+.. Note::
+    If the issue persists even after upgrading Apache Kafka® Streams to 3.6.1 version, please reach out to our support team for further assistance.