Comment #11 on issue 493 by protobuf-java (2.5.0) GeneratedMessage#getUnknownFields() not implemented

For your own project, regenerating the code is not unreasonable.

The problem comes when you use ant/ivy or maven to pull in a jar that you depend on and that dependent jar uses protobuf. It isn't clear that they use protobuf and it certainly isn't clear which version of protoc they used. If they happened to use a different protoc version then you'll get runtime error with a cryptic error message. For example, if I add the dependence:


I need to investigate whether it uses protobuf and which version. Otherwise, it will blow up at runtime. Furthermore, I can only use versions of the many different open source projects that use exactly the same version of protobuf.

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