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new b6cda68fcd3 MINOR: Update the AK doc to include changes in KIP-1291
(#22527)
b6cda68fcd3 is described below
commit b6cda68fcd3bd61e01e2e3449c585cd12ad5ae4b
Author: Sahil Devgon <[email protected]>
AuthorDate: Wed Jul 1 21:19:04 2026 +0530
MINOR: Update the AK doc to include changes in KIP-1291 (#22527)
- docs/getting-started/upgrade.md : Added
[KAFKA-20223](https://github.com/apache/kafka/pull/22454) fix to 4.4.0
notable changes section.
Reviewers: Ken Huang <[email protected]>, PoAn Yang
<[email protected]>, Chia-Ping Tsai <[email protected]>
---
docs/getting-started/upgrade.md | 1 +
1 file changed, 1 insertion(+)
diff --git a/docs/getting-started/upgrade.md b/docs/getting-started/upgrade.md
index 74550aa322c..50648c1fc22 100644
--- a/docs/getting-started/upgrade.md
+++ b/docs/getting-started/upgrade.md
@@ -35,6 +35,7 @@ type: docs
* The `ClientQuotaCallback#updateClusterMetadata` method is deprecated and
will be removed in Kafka 5.0. Custom implementations of `ClientQuotaCallback`
no longer need to override this method, as a default no-op implementation is
now provided. For further details, please refer to
[KIP-1200](https://cwiki.apache.org/confluence/x/axBJFg).
* The in-memory keystores (used for PEM certificates) now use the default
type provided by `KeyStore.getDefaultType()` instead of the hardcoded PKCS12
type.
* Storage directories formatted by the `kafka-storage` tool are no longer
forward-compatible. A Kafka broker must be the same version as, or newer than,
the `kafka-storage` tool that formatted its directory, regardless of the
`--release-version` chosen at format time. For further details, please refer to
[KIP-1170](https://cwiki.apache.org/confluence/x/ZYoEFQ).
+ * The Linux I/O metrics collector now exposes all 7 fields from
/proc/self/io via JMX, adding linux-disk-rchar, linux-disk-wchar,
linux-disk-syscr, linux-disk-syscw, and linux-disk-cancelled-write-bytes
alongside the existing linux-disk-read-bytes and linux-disk-write-bytes. These
additional metrics let operators calculate page-cache hit ratios, detect write
amplification from filesystem overhead, identify inefficient syscall patterns,
and monitor log-compaction I/O activity. For furth [...]
* The `kafka-share-groups.sh` tool can be used to initialize share group
offsets from a file. This enables a share group to be initialized from the
committed offsets of a consumer group. For further details, please refer to
[KIP-1323](https://cwiki.apache.org/confluence/x/vY0mGQ).
* Several Yammer-based group coordinator metrics are deprecated and will be
removed in Kafka 5.0 in favor of equivalent Kafka Metrics.
Please use
`kafka.server:type=group-coordinator-metrics,name=group-count,protocol=classic`
instead of `kafka.coordinator.group:type=GroupMetadataManager,name=NumGroups`,
