(kafka) branch trunk updated: MINOR: ELR release note for 4.1 (#19909)

[jo...@apache.org]

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The following commit(s) were added to refs/heads/trunk by this push:
     new b420e4092ef MINOR: ELR release note for 4.1 (#19909)
b420e4092ef is described below

commit b420e4092efab73a428ab53f3011c94e5bb7461f
Author: Calvin Liu <83...@users.noreply.github.com>
AuthorDate: Mon Jun 9 17:05:20 2025 -0700

    MINOR: ELR release note for 4.1 (#19909)
    
    Mention that ELR will be enabled by default on new clusters in 4.1
    
    Reviewers: Justine Olshan <jo...@confluent.io>
---
 docs/ops.html     | 8 ++++----
 docs/upgrade.html | 4 ++++
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/docs/ops.html b/docs/ops.html
index 247c7c00529..09842ee2084 100644
--- a/docs/ops.html
+++ b/docs/ops.html
@@ -4446,10 +4446,10 @@ $ bin/kafka-topics.sh --create --topic tieredTopic --bootstrap-server localhost:
   <h4 class="anchor-heading"><a id="eligible_leader_replicas_overview" class="anchor-link"></a><a href="#eligible_leader_replicas_overview">Overview</a></h4>
 
   <p>Starting from Apache Kafka 4.0, Eligible Leader Replicas (<a href="https://cwiki.apache.org/confluence/x/mpOzDw">KIP-966 Part 1</a>)
-    is available for the users to an improvement to Kafka replication. As the "strict min ISR" rule has been generally applied, which means the high watermark for the data partition can't advance
-    if the size of the ISR is smaller than the min ISR(<code>min.insync.replicas</code>), it makes some replicas that are not in the ISR safe to become the leader. The KRaft controller
-    stores such replicas in the PartitionRecord field called <code>Eligible Leader Replicas</code>. During the leader election, the controller will select the leaders
-    with the following order:</p>
+    is available for the users to an improvement to Kafka replication (ELR is enabled by default on new clusters starting 4.1). As the "strict min ISR" rule has been generally applied,
+    which means the high watermark for the data partition can't advance if the size of the ISR is smaller than the min ISR(<code>min.insync.replicas</code>), it makes some replicas
+    that are not in the ISR safe to become the leader. The KRaft controller stores such replicas in the PartitionRecord field called <code>Eligible Leader Replicas</code>. During the
+    leader election, the controller will select the leaders with the following order:</p>
   <ul>
     <li>If ISR is not empty, select one of them.</li>
     <li>If ELR is not empty, select one that is not fenced.</li>
diff --git a/docs/upgrade.html b/docs/upgrade.html
index ad011aa2587..1be3a20faa7 100644
--- a/docs/upgrade.html
+++ b/docs/upgrade.html
@@ -46,6 +46,10 @@
                         After the removal, <code>log.cleaner.threads</code> will also have a lower bound of 1.
                         For further details, please refer to <a href="https://cwiki.apache.org/confluence/x/XAyWF">KIP-1148</a>.
                     </li>
+                    <li>
+                        The KIP-966 part 1: Eligible Leader Replicas(ELR) will be enabled by default on the new clusters.
+                        For further details, please refer to <a href="/{{version}}/documentation.html#eligible_leader_replicas">here</a>.
+                    </li>
                 </ul>
             </li>
             <li><b>Producer</b>