[Enhancement] Upgrade protobuf-java to v4.x

[czheng-bt]

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• [x] I searched in the issues and found nothing similar.

Motivation

protobuf-java contains braking changes, and since protobuf v26, protobuf-java v4.x is needed. Can this dependency get upgraded?

Solution

No response

Alternatives

No response

Anything else?

No response

Are you willing to submit a PR?

• [ ] I'm willing to submit a PR!

[BewareMyPower]

Could it break compatibility for old clients?

[lhotari]

protobuf-java contains braking changes, and since protobuf v26, protobuf-java v4.x is needed. Can this dependency get upgraded?

The protobuf-java version is decoupled from the Pulsar Java client with #23632 changes. You should be able to use a newer protobuf-java version if you wish. Have you tried doing that? @czheng-bt what is your use case?

[lhotari]

protobuf-java contains braking changes, and since protobuf v26, protobuf-java v4.x is needed. Can this dependency get upgraded?

The protobuf-java version is decoupled from the Pulsar Java client with #23632 changes. You should be able to use a newer protobuf-java version if you wish. Have you tried doing that? @czheng-bt what is your use case?

Closing since there hasn't been a response to the previous question.