Incompatible with latest v26 Protocol Buffers (GeneratedMessageV3 removal)

[dennisameling]

Protocol Buffers v26.0 was released three weeks ago.

One of the breaking changes is this one:

[Java] The base class for generated messages will be GeneratedMessage, not GeneratedMessageV3.

This library doesn't seem to be compatible anymore now. For example, this PR is broken: #588

    e: Supertypes of the following classes cannot be resolved. Please make sure you have the required dependencies in the classpath:
        class io.grpc.examples.routeguide.Feature, unresolved supertypes: GeneratedMessageV3
        class io.grpc.examples.animals.BaaReply.Builder, unresolved supertypes: Builder<Builder>
        class io.grpc.examples.animals.BarkReply.Builder, unresolved supertypes: Builder<Builder>
        class io.grpc.examples.animals.OinkReply.Builder, unresolved supertypes: Builder<Builder>
        class io.grpc.examples.helloworld.HelloReply.Builder, unresolved supertypes: Builder<Builder>
        class io.grpc.examples.helloworld.HelloRequest.Builder, unresolved supertypes: Builder<Builder>
        class io.grpc.examples.routeguide.FeatureDatabase.Builder, unresolved supertypes: Builder<Builder>
        class io.grpc.examples.routeguide.Feature.Builder, unresolved supertypes: Builder<Builder>
        class io.grpc.examples.routeguide.Point.Builder, unresolved supertypes: Builder<Builder>
        class io.grpc.examples.routeguide.Rectangle.Builder, unresolved supertypes: Builder<Builder>
        class io.grpc.examples.routeguide.RouteNote.Builder, unresolved supertypes: Builder<Builder>
        class io.grpc.examples.routeguide.RouteSummary.Builder, unresolved supertypes: Builder<Builder>
        class io.grpc.examples.animals.BaaReply, unresolved supertypes: GeneratedMessageV3
        class io.grpc.examples.animals.BaaRequest, unresolved supertypes: GeneratedMessageV3
        class io.grpc.examples.animals.BaaRequest.Builder, unresolved supertypes: Builder<Builder>
        class io.grpc.examples.animals.BarkReply, unresolved supertypes: GeneratedMessageV3
        class io.grpc.examples.animals.BarkRequest, unresolved supertypes: GeneratedMessageV3
        class io.grpc.examples.animals.BarkRequest.Builder, unresolved supertypes: Builder<Builder>
        class io.grpc.examples.animals.OinkReply, unresolved supertypes: GeneratedMessageV3
        class io.grpc.examples.animals.OinkRequest, unresolved supertypes: GeneratedMessageV3
        class io.grpc.examples.animals.OinkRequest.Builder, unresolved supertypes: Builder<Builder>
        class io.grpc.examples.helloworld.HelloReply, unresolved supertypes: GeneratedMessageV3
        class io.grpc.examples.helloworld.HelloRequest, unresolved supertypes: GeneratedMessageV3
        class io.grpc.examples.routeguide.FeatureDatabase, unresolved supertypes: GeneratedMessageV3
        class io.grpc.examples.routeguide.Point, unresolved supertypes: GeneratedMessageV3
        class io.grpc.examples.routeguide.Rectangle, unresolved supertypes: GeneratedMessageV3
        class io.grpc.examples.routeguide.RouteNote, unresolved supertypes: GeneratedMessageV3
        class io.grpc.examples.routeguide.RouteSummary, unresolved supertypes: GeneratedMessageV3

Is there anything we can do to help make it compatible? Thanks!

[dennisameling]

Turns out there have been 75 commits to the master branch since the latest 1.4.1 release on December 14th, 2023. One of them is this one, which might (at least partially) fix these version mismatches.

@jamesward would you be able to release a new version with the latest changes from the master branch? We'd like to try and see if that resolves the issues for us. Thanks! 😊

Related issue: grpc/grpc-java#11015

[jamesward]

Hi @dennisameling, unfortunately I'm no longer working at Google so someone else will need to roll the release. Sorry!

[westito]

There is somebody at Google that can release a new version?

[jamesward]

@lowasser should be able to. Instructions are at:
https://github.com/grpc/grpc-kotlin/blob/master/BUILDING.md#releasing

[jasonab]

this problem appears to have been fixed on the Java side

[dennisameling]

This indeed seems to be an issue with grpc-java (related to the Protobuf upgrade) and not this particular library. A partial fix is already in place, with more fixes coming soon. I'm going to close this issue now.