MINOR: add note about KS memory leak bug (#729)
diff --git a/41/streams/upgrade-guide.html b/41/streams/upgrade-guide.html
index 02c0587..3831c2f 100644
--- a/41/streams/upgrade-guide.html
+++ b/41/streams/upgrade-guide.html
@@ -141,6 +141,8 @@
<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>
+
<h4>Early Access of the Streams Rebalance Protocol</h4>
<p>
diff --git a/41/upgrade.html b/41/upgrade.html
index 722a250..0ef6e63 100644
--- a/41/upgrade.html
+++ b/41/upgrade.html
@@ -21,6 +21,8 @@
<h4><a id="upgrade_4_1_0" href="#upgrade_4_1_0">Upgrading to 4.1.0</a></h4>
+<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>
+
<h5><a id="upgrade_4_1_0_from" href="#upgrade_4_1_0_from">Upgrading Servers to 4.1.0 from any version 3.3.x through 4.0.x</a></h5>
<h5><a id="upgrade_410_notable" href="#upgrade_410_notable">Notable changes in 4.1.0</a></h5>
<ul>
