Good catch.

For the PMD rule:

https://issues.apache.org/jira/browse/NIFI-15678
https://github.com/apache/nifi/pull/10977

On Fri, Mar 6, 2026 at 8:00 AM Pierre Villard
<[email protected]> wrote:
>
> Thanks Marton,
>
> For the switch issue, it is a result of this commit [1] where we added
> a PMD rule to avoid the default branch when all cases are covered.
> This is in place since 2.6.0 but I agree with you that this is
> problematic for situations where we bring an enum from the API.
>
> [1] 
> https://github.com/apache/nifi/commit/87f8445823d55b2fec8253d6bc669423e08e9bd4
>
> Le ven. 6 mars 2026 à 13:05, Marton Szasz <[email protected]> a écrit :
> >
> > Thanks Pierre. I can confirm that your PR fixes the issue, but:
> >
> > 1. I can't judge if other NIP-21 discussion participants would like the
> > new structure, so I'm hesitant to +1 your PR.
> >
> > 2. I see another (seemingly unrelated) issue pop up with API 2.7.0 when
> > building NiFi git main with it:
> >
> > [ERROR] Failed to execute goal
> > org.apache.maven.plugins:maven-compiler-plugin:3.14.1:compile
> > (default-compile) on project nifi-web-api: Compilation failure:
> > Compilation failure:
> > [ERROR]
> > /home/szaszm/verify-nifi-release/work/nifi_repo/nifi-framework-bundle/nifi-framework/nifi-web/nifi-web-api/src/main/java/org/apache/nifi/web/StandardNiFiServiceFacade.java:[4094,27]
> > error: the switch expression does not cover all possible input values
> > [ERROR]
> > /home/szaszm/verify-nifi-release/work/nifi_repo/nifi-framework-bundle/nifi-framework/nifi-web/nifi-web-api/src/main/java/org/apache/nifi/web/StandardNiFiServiceFacade.java:[6439,27]
> > error: the switch expression does not cover all possible input values
> >
> > The problem is that the ComponentType enum got a new value CONNECTOR,
> > and now switch blocks that don't handle that case no longer compile. I'm
> > not confident enough around NiFi to know the exact backwards
> > compatibility guarantees we provide, but treating new public enum values
> > as a breaking change seems a bit too restrictive.
> >
> > Let's discuss these and save the work of another RC. :)
> >
> > Thanks,
> > Marton
> >
> > On 3/6/26 10:15 AM, Pierre Villard wrote:
> > > -1, I just love doing RCs :)
> > >
> > > Thanks to Marton for reporting an issue with JAXB. I submitted a fix for 
> > > it [1].
> > >
> > > The TL;DR is that the NiFi Registry framework includes a
> > > FlowContentSerializer that supports multiple data model versions for
> > > reading stored flow snapshots. Data model version 1 uses a JAXB-based
> > > serializer (it's probably something that should go away...) and it has
> > > some limitations (it can't handle interfaces).
> > >
> > > [1] https://github.com/apache/nifi-api/pull/76
> > >
> > > Thanks,
> > > Pierre
> > >
> > > Le jeu. 5 mars 2026 à 21:02, Pierre Villard
> > > <[email protected]> a écrit :
> > >> Team,
> > >>
> > >> I am pleased to be calling this vote for the source release of Apache
> > >> NiFi API 2.7.0.
> > >>
> > >> Please review the following guide for how to verify a release candidate 
> > >> build:
> > >>
> > >> https://cwiki.apache.org/confluence/display/NIFI/Release+Candidate+Verification+for+NiFi+API
> > >>
> > >> The source being voted on the and the convenience binaries are
> > >> available on the Apache Distribution Repository:
> > >>
> > >> https://dist.apache.org/repos/dist/dev/nifi/nifi-api-2.7.0
> > >>
> > >> The build artifacts are available on the Apache Nexus Repository:
> > >>
> > >> https://repository.apache.org
> > >>
> > >> Git Tag: nifi-api-2.7.0-RC3
> > >> Git Commit ID: 83b33d7fe57fbcc359516266c978459366166faf
> > >> GitHub Commit Link:
> > >> https://github.com/apache/nifi-api/commit/83b33d7fe57fbcc359516266c978459366166faf
> > >>
> > >> Hashes of nifi-api-2.7.0-source-release.zip
> > >>
> > >> SHA512: 
> > >> b89b0231f430de99d19915eafb494aafdb7e1b5c1ee500d8ad4a2ff768171eb243b68d3c55af08c5a966d70ac2a0a6d0de519c35df23abe2cb7ef099b569aeb6
> > >>
> > >> Release artifacts are signed with the following key:
> > >>
> > >> https://people.apache.org/keys/committer/pvillard31.asc
> > >>
> > >> KEYS file is available on the Apache Distribution Repository:
> > >>
> > >> https://dist.apache.org/repos/dist/release/nifi/KEYS
> > >>
> > >> Issues resolved for this version: 14
> > >>
> > >> https://issues.apache.org/jira/secure/ReleaseNote.jspa?projectId=12316020&version=12356655
> > >>
> > >> Release note highlights can be found on the project wiki:
> > >>
> > >> https://cwiki.apache.org/confluence/display/NIFI/Release+Notes#ReleaseNotes-NiFiAPIVersion2.7.0
> > >>
> > >> The vote will be open for 72 hours.
> > >>
> > >> Please download the release candidate and evaluate the necessary items
> > >> including checking hashes, signatures, build from source, and test.
> > >> Then please vote:
> > >>
> > >> [] +1 Release this package as nifi-api-2.7.0
> > >> [] +0 no opinion
> > >> [] -1 Do not release this package because...

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