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new be36babf556 KAFKA-20536 Fix empty heading - Adding upgrade
instructions for 4.1 - in trunk (#22153)
be36babf556 is described below
commit be36babf5567d34de5ec8aaf67de16c5fbc8932d
Author: Murali Basani <[email protected]>
AuthorDate: Thu Apr 30 19:58:40 2026 +0200
KAFKA-20536 Fix empty heading - Adding upgrade instructions for 4.1 - in
trunk (#22153)
Ref : https://issues.apache.org/jira/browse/KAFKA-20536 Fix empty
heading.
Based on
https://github.com/apache/kafka/pull/22149/changes#diff-c5e3efa4452ee71b237606125679318121ab54a9491902bebf0b7e54e7c35c33R52,
adding upgrade instruction to 4.3 branch as well.
Reviewers: Chia-Ping Tsai <[email protected]>
---
docs/getting-started/upgrade.md | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/docs/getting-started/upgrade.md b/docs/getting-started/upgrade.md
index 1f30f2b2e7f..bcfe9e76700 100644
--- a/docs/getting-started/upgrade.md
+++ b/docs/getting-started/upgrade.md
@@ -118,12 +118,31 @@ For further details, please refer to
[KIP-1120](https://cwiki.apache.org/conflue
* Added an optional `--node-id` flag to the `FeatureCommand` command. It
specifies the node to describe. If not provided, an arbitrary node is used.
+## Upgrading to 4.1.2
+
+### Notable changes in 4.1.2
+
+* Includes a fix for the rare Kafka producer bug
([KAFKA-19012](https://issues.apache.org/jira/browse/KAFKA-19012)), in which a
record could end up on the incorrect topic.
+
+
+
+## Upgrading to 4.1.1
+
+### Notable changes in 4.1.1
+
+* Includes a fix for the critical Kafka Streams bug
([KAFKA-19748](https://issues.apache.org/jira/browse/KAFKA-19748)), solving the
memory leak issues that affected users of range scans and certain DSL operators
(session windows, sliding windows, stream-stream joins, foreign-key joins).
+* Includes a fix for the critical Kafka Streams bug
([KAFKA-19479](https://issues.apache.org/jira/browse/KAFKA-19479)), related to
potential data loss.
+
+
+
## Upgrading to 4.1.0
**Note:** Kafka Streams 4.1.0 contains a critical memory leak bug
([KAFKA-19748](https://issues.apache.org/jira/browse/KAFKA-19748)) 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, which includes the fix for it.
### Upgrading Servers to 4.1.0 from any version 3.3.x through 4.0.x
+The rolling upgrade procedure for 4.1.x is identical to the 4.0 upgrade.
Please refer to the [Upgrading Servers to
4.0.x](#upgrading-servers-to-401-from-any-version-33x-through-39x) section for
detailed step-by-step instructions.
+
### Notable changes in 4.1.0
* Apache Kafka 4.1 ships with a preview of Queues for Kafka
([KIP-932](https://cwiki.apache.org/confluence/x/4hA0Dw)). This feature
introduces a new kind of group called share groups, as an alternative to
consumer groups. Consumers in a share group cooperatively consume records from
topics, without assigning each partition to just one consumer. Share groups
also introduce per-record acknowledgement and counting of delivery attempts.
Use share groups in cases where records are processed [...]
