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Nov 7, 2025
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MINOR: add docs for streams kip #20834

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add docs for streams kip
RaidenE1 Nov 5, 2025
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RaidenE1 Nov 7, 2025
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9 changes: 9 additions & 0 deletions docs/streams/upgrade-guide.html
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Expand Up @@ -137,6 +137,15 @@ <h3><a id="streams_api_changes_420" href="#streams_api_changes_420">Streams API
More details can be found in <a href="https://cwiki.apache.org/confluence/x/8AxJFg">KIP-1195</a>.
</p>

<p>
Kafka Streams now provides rebalance listener metrics for "streams" groups to monitor the latency of rebalance callbacks.
The following metrics are available at the thread level: <code>tasks-revoked-latency-avg</code>, <code>tasks-revoked-latency-max</code>,
<code>tasks-assigned-latency-avg</code>, <code>tasks-assigned-latency-max</code>, <code>tasks-lost-latency-avg</code>, and <code>tasks-lost-latency-max</code>.
Note that these metrics are only populated when the Streams Rebalance Protocol (KIP-1071) is enabled.
Users migrating from the consumer rebalance listener metrics should update their monitoring dashboards and alerts to use these new streams-specific metrics.
More details can be found in <a href="https://cwiki.apache.org/confluence/x/ywnxFg">KIP-1216</a>.
</p>

<h3><a id="streams_api_changes_410" href="#streams_api_changes_410">Streams API changes in 4.1.0</a></h3>

<p><b>Note:</b> Kafka Streams 4.1.0 contains a critical memory leak bug (<a href="https://issues.apache.org/jira/browse/KAFKA-19748">KAFKA-19748</a>) that affects users of range scans and certain DSL operators (session windows, sliding windows, stream-stream joins, foreign-key joins). Users running Kafka Streams should consider upgrading directly to 4.1.1 when available.</p>
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