Sure, we can wait on completion of the work to add a protobuf datatype
Viraj. What is the JIRA for that?

On Wed, Oct 14, 2026 at 8:31 AM Viraj Jasani <[email protected]> wrote:

> Thank you for starting the thread, Andrew.
>
> Thank you for also taking the role of RM for 5.4.0 release.
>
> I agree with the above scope. I don’t have strong opinion on dropping JDK 8
> support in minor release line, but given that we have significantly larger
> features getting released in minor releases (5.3.0, 5.4.0), it should be
> okay to drop JDK 8 support.
>
> In addition to the above listed features and improvements, one more
> upcoming feature is support for Protobuf data type. This would enhance
> Phoenix document database capability.
>
>
> On Fri, Oct 9, 2026 at 1:49 PM Andrew Purtell <[email protected]> wrote:
>
> > Hi all,
> >
> > I propose that we start work toward Phoenix 5.4.0. As such, I
> > volunteer myself as your RM for the 5.4.0 release and will start
> > the tasks required to complete it.
> >
> > Please give your feedback on the plan, and on the questions toward
> > the end of this mail.
> >
> > SCOPE
> >
> > 5.4.0 contains everything that has landed on master so far
> > and including these additional in-flight features:
> >
> >   - EXPLAIN improvements (PHOENIX-7876) -- committed to master
> >   - V2 WHERE optimizer (PHOENIX-6791) -- PR #2428 is approved.
> >   - Consistent Failover (PHOENIX-7562) -- in development on the
> >     PHOENIX-7562-feature-new branch.
> >   - Vector indexes, Phase 1 and Phase 2 (PHOENIX-7998 and
> >     PHOENIX-8009, umbrella PHOENIX-8008) -- Both are in review.
> >
> > Master also has TRUNCATE TABLE (PHOENIX-300), and numerous other
> > changes that are not on 5.3, committed over the intervening time.
> >
> > The V2 WHERE optimizer is off by default in 5.4.0. Users will enable
> > it per their discretion with phoenix.where.optimizer.v2.enabled=true.
> > Consistent Failover and Vector Indexes are also opt-in features that
> > do not have an impact unless configured and enabled.
> >
> > We will cut the 5.4 branch only after all of the features above are
> > merged to master. For this reason, the date of the cut depends on the
> > readiness of the features, with the possible exception of Consistent
> > Failover, which has 21 open subtasks. Stabilization of 5.4 branch can
> > begin with most everything else in place and Consistent Failover can
> > come in at any point as a backport of the merge commit to master
> > branch.
> >
> > MINIMUM JAVA VERSION POLICY
> >
> > 5.4.0 as proposed changes the minimum supported Java version policy:
> >
> >   - Minimum: Java 11. 5.4.0 will not build or run on Java 8.
> >   - Recommended: Java 17.
> >   - Suggested for vector indexes: Java 21.
> >
> > Phoenix ships multi-release jars. On Java 21, the JVM loads vector
> > kernels that use the Panama Vector API. On Java 11 and 17, it loads
> > portable kernels.
> >
> > Although this is a significant change for users, it is unlikely users
> > remain on Java 8 for a myriad of technical and compliance related
> > reasons. The release notes will state the policy clearly. Users who
> > must stay on Java 8 can continue with the 5.3 release line.
> >
> > PLAN
> >
> >   Phase 1. Land the features on master. PHOENIX-6791 merges first.
> >     PHOENIX-7998 and PHOENIX-8009 merge in sequence. PHOENIX-8009
> >     also moves the build and CI to Java 11. Consistent Failover
> >     merges last.
> >
> >   Phase 2. Cut the 5.4 branch. Master moves to 5.5.0-SNAPSHOT. We
> >     triage the unresolved 5.4.0 issues in JIRA, and keep only the
> >     release blockers.
> >
> >   Phase 3. Stabilize. The work includes these items:
> >     - Fix or quarantine flaky tests.
> >     - Harden each new feature.
> >     - Test compatibility and upgrade from 5.2 and 5.3.
> >     - Build and test each HBase profile on JDK 11, 17, and 21.
> >     - Review licenses for the new dependencies.
> >     - Update the release tooling to JDK 17.
> >     - Check the downstream projects.
> >     - Write the release notes and documentation.
> >
> >   Phase 4. Release candidates and vote.
> >
> > The Critical issues PHOENIX-7279 and PHOENIX-7596 currently block
> > releasing.
> >
> > The work of stabilizing the tests is expected to be the bulk of the
> > required time and effort.
> >
> > On the 5.4 branch, bug fixes, test fixes, and documentation can go in
> > after review. New features and behavior changes need the consent of
> > the release manager.
> >
> > PHASE 3 WORKSTREAMS
> >
> > 1. Test health
> >
> > - Fix flaky tests, or quarantine them with a JIRA.
> > - Get the nightly results clean.
> >
> > 2. Feature hardening
> >
> > - V2 WHERE optimizer: Add a CI run of the full integration test
> >   suite with the V2 WHERE optimizer enabled.
> > - Consistent Failover: Run the cross-cluster integration tests.
> >   Test a rolling upgrade while clients that use the ZooKeeper-
> >   based HA connection continue to have service. Finish the HA client
> >   documentation.
> > - Vector indexes: Make sure that each shaded jar preserves the multi-
> >   release manifest.
> >
> > 3. Compatibility and upgrade
> >
> > - Use the backward compatibility test framework (PHOENIX-7702).
> >   Test 5.3 clients against 5.4 servers, and 5.4 clients against 5.3
> >   servers.
> > - Test the upgrade of the SYSTEM tables from 5.3.
> > - Test a rolling upgrade of the region servers from 5.3 to 5.4.
> >
> > 4. Supported JDK matrix
> >
> > - Build and test each HBase profile (2.5.0, 2.5, 2.6.0, 2.6) on JDKs
> >   11, 17, and 21.
> > - Record the supported combinations in the release notes.
> >
> > 5. Dependencies and legal requirements
> >
> > - Review LICENSE and NOTICE for the new dependencies and their
> >   transitive dependencies.
> > - Do a CVE scan of the binary artifacts.
> > - Ensure Apache RAT audits are successful.
> >
> > 6. Release tooling
> >
> > - The release image `dev/create-release/phoenix-rm/Dockerfile` uses
> >   JDK 8. Move it to JDK 11 at least, although JDK 17 is recommended.
> > - Do a dry run of the release scripts before RC0.
> >
> > 7. Downstream projects
> >
> > - Build `phoenix-queryserver` and `phoenix-connectors` against
> >   `5.4.0-SNAPSHOT` with Java 11 or later and document any changes
> >   required. Note that the 5.4.0 core release is not blocked by these
> >   downstreamers, who can continue with 5.3.
> >
> > 8. Documentation
> >
> > - The release notes will include these items:
> >   - The new minimum Java version policy.
> >   - The EXPLAIN format changes.
> >   - The new features, their flags or configuration options, and
> >     defaults.
> >   - The supported HBase versions and JDKs.
> > - Update the website documentation for vector indexes, Consistent
> >   Failover, and EXPLAIN improvements.
> >
> > The exit criteria for Phase 3 are as follows:
> >
> > - No release blockers are open.
> > - The nightly builds pass on the full platform matrix.
> > - The compatibility and upgrade tests pass.
> > - The release notes and documentation are complete.
> > - The release tooling dry run passes.
> >
> > QUESTIONS
> >
> > Do we agree on the scope?
> >
> > Do we accept the minimum Java version policy for the 5.4 code line:
> > Java 11 minimum, Java 17 recommended, Java 21 suggested for vector
> > indexes?
> >
> > Are there other current blockers in addition to PHOENIX-7279 and
> > PHOENIX-7596?
> >
> > --
> > Best regards,
> > Andrew
> >

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