Thanks Lianet!

I was hoping for something earlier, but I agree that we need to give enough time for the two blocker issues.


-Matthias


On 10/8/25 10:04 AM, Lianet M. wrote:
Thanks for the updates Mickael and David! Both jiras in the plan as
blockers.

Lianet

On Wed, Oct 8, 2025, 12:15 p.m. Mickael Maison <[email protected]>
wrote:

Hi,

Thanks Lianet for volunteering.

Regarding the Connect issue, so far we've confirmed there's indeed a
regression introduced in 4.1.0 regarding plugin loading.
In the Jira [0] there is agreement on the expected behavior. I've
started working on a fix.

I'll update you once things have progressed.

Thanks,
Mickael

0: https://issues.apache.org/jira/browse/KAFKA-19758

On Wed, Oct 8, 2025 at 9:32 AM David Jacot <[email protected]>
wrote:

Hi Lianet,

Thanks for volunteering and the plan.

I would like to get KAFKA-19760 in this release too. It is a nasty bug
which impacts the reliability of the group/share coordinators. The PR is
ready, it should be merged by the deadline.

Best,
David

On Wed, Oct 8, 2025 at 3:58 AM Lianet M. <[email protected]> wrote:

Hello,

Based on the previous discussion, here is a proposal of release plan
for
4.1.1

https://cwiki.apache.org/confluence/display/KAFKA/Release+Plan+4.1.1

Aiming for code freeze in a week from now, mainly to allow time to
investigate the Connect  issue Mickael shared (
https://issues.apache.org/jira/browse/KAFKA-19758), but still be able
to
ship this release as soon as possible. Note that there is also an open
blocker but has a PR in review (I will follow-up with them)

Let's wait to hear from Mickael, and we can adjust the target date if
needed. Let me know if you have any thoughts in the meantime.

Thanks!

Lianet


On Tue, Oct 7, 2025 at 1:09 PM Matthias J. Sax <[email protected]>
wrote:

Any idea how much time you will need Mickael?

Personally, I would like to move fast, and delaying the release for
an
uncertain amount of time seems not desirable. We will do a 4.1.2
release
for sure some time later.

But I understand that it's a critical issue for Connect, so I agree
that
it would be great to get into 4.1.1. (Or as a last resort, so a quick
4.1.2 after you figured out a fix, in case you need more time...)


@Lianet: Thanks for volunteering to be the RM! Can you prepare a
release
plan?


-Matthias


On 10/7/25 9:42 AM, Mickael Maison wrote:
Hi,

If we do a 4.1.1 I'd like to include
https://issues.apache.org/jira/browse/KAFKA-19758.
I'm still investigating but it looks like KIP-891 broke plugin
isolation in Connect and thus workloads that worked with Connect
4.0.0
don't work anymore on 4.1.0.

Thanks,
Mickael

On Mon, Oct 6, 2025 at 3:54 PM Chia-Ping Tsai <[email protected]>
wrote:

+1 to release 4.1.1 ASAP



Lianet M. <[email protected]> 於 2025年10月6日 週一 下午9:33寫道:

Hello,

Agree with the proposed 4.1.1 bug fix release to ship this asap.
If
we
all
agree on the need for it, I would like to volunteer to be the
release
manager.

Best,
Lianet

On Fri, Oct 3, 2025 at 5:44 PM Matthias J. Sax <[email protected]

wrote:

Hello,

we now understand the recently reported memory leak bug in Kafka
Streams
4.1.0, and have a PR to fix it.

https://issues.apache.org/jira/browse/KAFKA-19748

I consider this bug severe, as we expect that it affects a large
number
of Kafka Streams user, makes Kafka Streams unusable, and there
is no
workaround.

So I would like to propose to start 4.1.1 bug-fix release
immediately,
and also update the Kafka web page with a note that people
should be
careful and maybe not even upgrade to Kafka Streams 4.1.0.

Looking forward to your feedback.


-Matthias








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