Hey all, A contributor just pointed out a small but noticeable flaw in the implementation of KIP-581 https://cwiki.apache.org/confluence/display/KAFKA/KIP-581%3A+Value+of+optional+null+field+which+has+default+value which is planned for this release. Impact: the feature works for root values in a record, but does not work for any fields within structs. Fields within structs will continue to have their previous, backwards-compatible behavior. The contributor has submitted a bug-fix PR which reports the problem and does not yet have a merge-able solution, but they are actively responding and interested in having this fixed: https://github.com/apache/kafka/pull/13748 The overall fix should be a one-liner + some unit tests. While this is not a regression, it does make the feature largely useless, as the majority of use-cases will be for struct fields.
Thanks! Greg Harris On Wed, May 24, 2023 at 7:05 PM Ismael Juma <ism...@juma.me.uk> wrote: > > I agree the migration should be functional - it wasn't obvious if the > migration issues are edge cases or not. If they are edge cases, I think > 3.5.1 would be fine given the preview status. > > I understand that a new RC is needed, but that doesn't mean we should let > everything in. Each change carries some risk. And if we don't agree on the > bar for the migration work, we may be having the same discussion next week. > :) > > Ismael > > On Wed, May 24, 2023, 12:00 PM Josep Prat <josep.p...@aiven.io.invalid> > wrote: > > > Hi there, > > Is the plan described in KIP-833[1] still valid? In there it states that > > 3.5.0 should aim at deprecation of Zookeeper, so conceptually, the path to > > migrate to Kraft should be somewhat functional (in my opinion). If we don't > > want to deprecate Zookeeper in 3.5.0, then I share Ismael's opinion that > > these could be fixed in subsequent patches of 3.5.x. Just my 5cts. > > > > [1]: > > > > https://cwiki.apache.org/confluence/display/KAFKA/KIP-833:+Mark+KRaft+as+Production+Ready#KIP833:MarkKRaftasProductionReady-Kafka3.5 > > Best, > > > > On Wed, May 24, 2023 at 8:51 PM Ismael Juma <ism...@juma.me.uk> wrote: > > > > > Are all these blockers? For example, zk to kraft migration are is still > > in > > > preview - can we fix some of these in 3.5.1? > > > > > > Ismael > > > > > > On Wed, May 24, 2023, 10:22 AM Colin McCabe <cmcc...@apache.org> wrote: > > > > > > > Hi Mickael, > > > > > > > > Thanks for putting together this RC. Unfortunately, we've identified > > > > several blocker issues in this release candidate. > > > > > > > > KAFKA-15009: New ACLs are not written to ZK during migration > > > > KAFKA-15007: MV is not set correctly in the MetadataPropagator in > > > > migration. > > > > KAFKA-15004: Topic config changes are not synced during zk to kraft > > > > migration (dual-write) > > > > KAFKA-15003: TopicIdReplicaAssignment is not updated in migration > > > > (dual-write) when partitions are changed for topic > > > > KAFKA-14996: The KRaft controller should properly handle overly large > > > user > > > > operations > > > > > > > > We are working on PRs for these issues and will get them in soon, we > > > think! > > > > > > > > So unfortunately I have to leave a -1 here for RC0. Let's aim for > > another > > > > RC next week. > > > > > > > > best, > > > > Colin > > > > > > > > On Wed, May 24, 2023, at 07:05, Mickael Maison wrote: > > > > > Hi David, > > > > > > > > > > We're already quite a bit behind schedule. If you think these fixes > > > > > are really important and can be ready in the next couple of days, I'm > > > > > open to backport them and build another release candidate. Let me > > know > > > > > once you've investigated the severity of KAFKA-15010. > > > > > > > > > > Thanks, > > > > > Mickael > > > > > > > > > > > > > > > On Tue, May 23, 2023 at 6:34 PM David Arthur > > > > > <david.art...@confluent.io.invalid> wrote: > > > > >> > > > > >> Mickael, we have some migration fixes on trunk, is it okay to > > > > cherry-pick > > > > >> these to 3.5? > > > > >> > > > > >> KAFKA-15007 Use the correct MetadataVersion in MigrationPropagator > > > > >> KAFKA-15009 Handle new ACLs in KRaft snapshot during migration > > > > >> > > > > >> There is another issue KAFKA-15010 that I'm also investigating to > > > > determine > > > > >> the impact and likelihood of seeing it in practice. This one may be > > a > > > > >> significant migration blocker > > > > >> > > > > >> Cheers, > > > > >> David > > > > >> > > > > >> On Tue, May 23, 2023 at 9:57 AM Mickael Maison < > > > > mickael.mai...@gmail.com> > > > > >> wrote: > > > > >> > > > > >> > Hi Christo, > > > > >> > > > > > >> > Yes this is expected. This happens when nested fields also accept > > > > >> > optional tagged fields. The tables list all fields, so they may > > > > >> > include _tagged_fields multiple times. > > > > >> > Clearly the layout of this page could be improved, if you have > > ideas > > > > >> > how to describe the protocol in a better way, feel free to share > > > them. > > > > >> > > > > > >> > Thanks, > > > > >> > Mickael > > > > >> > > > > > >> > On Tue, May 23, 2023 at 3:50 PM Mickael Maison < > > > > mickael.mai...@gmail.com> > > > > >> > wrote: > > > > >> > > > > > > >> > > Hi Josep, > > > > >> > > > > > > >> > > Good catch! I opened a PR to fix this: > > > > >> > > https://github.com/apache/kafka-site/pull/514 > > > > >> > > > > > > >> > > Thanks, > > > > >> > > Mickael > > > > >> > > > > > > >> > > > > > > >> > > On Tue, May 23, 2023 at 3:36 PM Christo Lolov < > > > > christolo...@gmail.com> > > > > >> > wrote: > > > > >> > > > > > > > >> > > > Hey Mickael! > > > > >> > > > > > > > >> > > > I am giving a +1 (non-binding) for this candidate release. > > > > >> > > > > > > > >> > > > * Built from the binary tar.gz source with Java 17 and Scala > > > 2.13 > > > > on > > > > >> > Intel > > > > >> > > > (m5.4xlarge) and ARM (m6g.4xlarge) machines. > > > > >> > > > * Ran unit and integration tests on Intel and ARM machines. > > > > >> > > > * Ran the Quickstart in both Zookeeper and KRaft modes on > > Intel > > > > and ARM > > > > >> > > > machines. > > > > >> > > > > > > > >> > > > Question: > > > > >> > > > * I went through https://kafka.apache.org/35/protocol.html > > and > > > > there > > > > >> > are > > > > >> > > > quite a few repetitive __tagged_fileds fields within the same > > > > >> > structures - > > > > >> > > > is this expected? > > > > >> > > > > > > > >> > > > On Tue, 23 May 2023 at 12:01, Josep Prat > > > > <josep.p...@aiven.io.invalid> > > > > >> > > > wrote: > > > > >> > > > > > > > >> > > > > Hi Mickael, > > > > >> > > > > I just wanted to point out that I think the documentation > > you > > > > >> > recently > > > > >> > > > > merged on Kafka site regarding the 3.5.0 version has a > > problem > > > > when > > > > >> > it > > > > >> > > > > states the version number and the sub-menu that links to > > > > previous > > > > >> > versions. > > > > >> > > > > Left a comment here: > > > > >> > > > > > > > > >> > > > > > > > > > > https://github.com/apache/kafka-site/pull/513#pullrequestreview-1438927939 > > > > >> > > > > > > > > >> > > > > Best, > > > > >> > > > > > > > > >> > > > > On Tue, May 23, 2023 at 9:29 AM Josep Prat < > > > josep.p...@aiven.io > > > > > > > > > >> > wrote: > > > > >> > > > > > > > > >> > > > > > Hi Mickael, > > > > >> > > > > > > > > > >> > > > > > I can +1 this candidate. I verified the following: > > > > >> > > > > > - Built from source with Java 17 and Scala 2.13 > > > > >> > > > > > - Signatures and hashes of the artifacts generated > > > > >> > > > > > - Navigated through Javadoc including links to JDK classes > > > > >> > > > > > - Run the unit tests > > > > >> > > > > > - Run integration tests > > > > >> > > > > > - Run the quickstart in KRaft and Zookeeper mode > > > > >> > > > > > > > > > >> > > > > > Best, > > > > >> > > > > > > > > > >> > > > > > On Mon, May 22, 2023 at 5:30 PM Mickael Maison < > > > > >> > mimai...@apache.org> > > > > >> > > > > > wrote: > > > > >> > > > > > > > > > >> > > > > >> Hello Kafka users, developers and client-developers, > > > > >> > > > > >> > > > > >> > > > > >> This is the first candidate for release of Apache Kafka > > > > 3.5.0. > > > > >> > Some of > > > > >> > > > > the > > > > >> > > > > >> major features include: > > > > >> > > > > >> - KIP-710: Full support for distributed mode in dedicated > > > > >> > MirrorMaker > > > > >> > > > > >> 2.0 clusters > > > > >> > > > > >> - KIP-881: Rack-aware Partition Assignment for Kafka > > > > Consumers > > > > >> > > > > >> - KIP-887: Add ConfigProvider to make use of environment > > > > variables > > > > >> > > > > >> - KIP-889: Versioned State Stores > > > > >> > > > > >> - KIP-894: Use incrementalAlterConfig for syncing topic > > > > >> > configurations > > > > >> > > > > >> - KIP-900: KRaft kafka-storage.sh API additions to > > support > > > > SCRAM > > > > >> > for > > > > >> > > > > >> Kafka Brokers > > > > >> > > > > >> > > > > >> > > > > >> Release notes for the 3.5.0 release: > > > > >> > > > > >> > > > > >> > > > > https://home.apache.org/~mimaison/kafka-3.5.0-rc0/RELEASE_NOTES.html > > > > >> > > > > >> > > > > >> > > > > >> *** Please download, test and vote by Friday, May 26, 5pm > > > PT > > > > >> > > > > >> > > > > >> > > > > >> Kafka's KEYS file containing PGP keys we use to sign the > > > > release: > > > > >> > > > > >> https://kafka.apache.org/KEYS > > > > >> > > > > >> > > > > >> > > > > >> * Release artifacts to be voted upon (source and binary): > > > > >> > > > > >> https://home.apache.org/~mimaison/kafka-3.5.0-rc0/ > > > > >> > > > > >> > > > > >> > > > > >> * Maven artifacts to be voted upon: > > > > >> > > > > >> > > > > >> > > > > > https://repository.apache.org/content/groups/staging/org/apache/kafka/ > > > > >> > > > > >> > > > > >> > > > > >> * Javadoc: > > > > >> > > > > >> > > https://home.apache.org/~mimaison/kafka-3.5.0-rc0/javadoc/ > > > > >> > > > > >> > > > > >> > > > > >> * Tag to be voted upon (off 3.5 branch) is the 3.5.0 tag: > > > > >> > > > > >> https://github.com/apache/kafka/releases/tag/3.5.0-rc0 > > > > >> > > > > >> > > > > >> > > > > >> The PR adding the 35 documentation is not merged yet > > > > >> > > > > >> (https://github.com/apache/kafka-site/pull/513) > > > > >> > > > > >> * Documentation: > > > > >> > > > > >> https://kafka.apache.org/35/documentation.html > > > > >> > > > > >> * Protocol: > > > > >> > > > > >> https://kafka.apache.org/35/protocol.html > > > > >> > > > > >> > > > > >> > > > > >> * Successful Jenkins builds for the 3.5 branch: > > > > >> > > > > >> Unit/integration tests: Jenkins is not detecting the 3.5 > > > > branch, > > > > >> > > > > >> working with INFRA to sort it out: > > > > >> > > > > >> https://issues.apache.org/jira/browse/INFRA-24577 > > > > >> > > > > >> System tests: The build is still running, I'll send an > > > update > > > > >> > once I > > > > >> > > > > >> have the results > > > > >> > > > > >> > > > > >> > > > > >> Thanks, > > > > >> > > > > >> Mickael > > > > >> > > > > >> > > > > >> > > > > > > > > > >> > > > > > > > > > >> > > > > > -- > > > > >> > > > > > [image: Aiven] <https://www.aiven.io> > > > > >> > > > > > > > > > >> > > > > > *Josep Prat* > > > > >> > > > > > Open Source Engineering Director, *Aiven* > > > > >> > > > > > josep.p...@aiven.io | +491715557497 > > > > >> > > > > > aiven.io <https://www.aiven.io> | > > > > >> > > > > > <https://www.facebook.com/aivencloud> > > > > >> > > > > > <https://www.linkedin.com/company/aiven/> < > > > > >> > > > > https://twitter.com/aiven_io> > > > > >> > > > > > *Aiven Deutschland GmbH* > > > > >> > > > > > Alexanderufer 3-7, 10117 Berlin > > > > >> > > > > > Geschäftsführer: Oskari Saarenmaa & Hannu Valtonen > > > > >> > > > > > Amtsgericht Charlottenburg, HRB 209739 B > > > > >> > > > > > > > > > >> > > > > > > > > >> > > > > > > > > >> > > > > -- > > > > >> > > > > [image: Aiven] <https://www.aiven.io> > > > > >> > > > > > > > > >> > > > > *Josep Prat* > > > > >> > > > > Open Source Engineering Director, *Aiven* > > > > >> > > > > josep.p...@aiven.io | +491715557497 > > > > >> > > > > aiven.io <https://www.aiven.io> | < > > > > >> > https://www.facebook.com/aivencloud > > > > >> > > > > > > > > > >> > > > > <https://www.linkedin.com/company/aiven/> < > > > > >> > > > > https://twitter.com/aiven_io> > > > > >> > > > > *Aiven Deutschland GmbH* > > > > >> > > > > Alexanderufer 3-7, 10117 Berlin > > > > >> > > > > Geschäftsführer: Oskari Saarenmaa & Hannu Valtonen > > > > >> > > > > Amtsgericht Charlottenburg, HRB 209739 B > > > > >> > > > > > > > > >> > > > > > >> > > > > >> > > > > >> -- > > > > >> -David > > > > > > > > > > > > > -- > > [image: Aiven] <https://www.aiven.io> > > > > *Josep Prat* > > Open Source Engineering Director, *Aiven* > > josep.p...@aiven.io | +491715557497 > > aiven.io <https://www.aiven.io> | <https://www.facebook.com/aivencloud > > > > > <https://www.linkedin.com/company/aiven/> < > > https://twitter.com/aiven_io> > > *Aiven Deutschland GmbH* > > Alexanderufer 3-7, 10117 Berlin > > Geschäftsführer: Oskari Saarenmaa & Hannu Valtonen > > Amtsgericht Charlottenburg, HRB 209739 B > >
