mimaison commented on code in PR #24014:
URL: https://github.com/apache/kafka/pull/24014#discussion_r4483473795
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docs/getting-started/upgrade.md:
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@@ -57,6 +65,7 @@ type: docs
* Streams groups now support the new broker configuration
`group.streams.rack.aware.assignment.tags` and the new group configuration
`streams.rack.aware.assignment.tags`, which set the client tag keys for
rack-aware standby task assignment. Members missing a listed `client.tag.<key>`
receive the new `StreamsGroupHeartbeat` status `MISSING_CLIENT_TAGS` (6), sent
only on version 1. The built-in `sticky` assignor does not use the tags yet.
For further details, please refer to the [Kafka Streams upgrade
guide](/{version}/streams/upgrade-guide/).
* Kafka Streams now supports static membership (`group.instance.id`) with
the Streams Rebalance Protocol (`group.protocol=streams`). This requires
brokers and clients running 4.4 or newer: brokers older than 4.4 reject
`group.instance.id` on the streams group heartbeat with `INVALID_REQUEST`,
which is a fatal error that shuts down the Kafka Streams client. Make sure to
remove `group.instance.id` from all Streams applications using
`group.protocol=streams` and restart them before downgrading brokers below 4.4.
For further details, please refer to the [Kafka Streams upgrade
guide](/{version}/streams/upgrade-guide/).
* Controllers can now be unregistered from the cluster metadata. A new
`kafka-cluster.sh unregister-controller` command and a `--unregister` flag on
`kafka-metadata-quorum.sh remove-controller` are provided, backed by the new
`Admin#unregisterController` API and the new `UnregisterController` RPC. This
introduces the error code `CONTROLLER_ID_NOT_REGISTERED` (136) and requires
metadata version `4.4-IV2` (`IBP_4_4_IV2`). For further details, please refer
to
[KIP-1312](https://cwiki.apache.org/confluence/spaces/KAFKA/pages/406623954/KIP-1312+Support+unregistering+controllers).
+ * ACL host patterns can now use CIDR notation, for example `192.168.0.0/24`
or `2001:db8::/32`, in addition to a single IP address or the `*` wildcard.
This allows a single ACL to cover a whole IPv4 or IPv6 subnet. Creating an ACL
with a CIDR host pattern requires metadata version `4.4-IV1` (`IBP_4_4_IV1`) or
higher; until the upgrade is finalized to that version, such requests are
rejected with `UNSUPPORTED_VERSION`. For further details, please refer to
KIP-1276 and [KAFKA-20088](https://issues.apache.org/jira/browse/KAFKA-20088).
Review Comment:
Can we link to the KIP (https://cwiki.apache.org/confluence/x/DIY8G) instead
of the JIRA?
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