Upgrade Protobuf Java to 3.22.3 (aka 22.3) #10045
Merged
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The version used by protoc-gen-grpc-java will be upgraded separately, because of large C++ build changes necessary. But that won't impact users at all. We are upgrading to protoc 22.3; only the grpc plugin is not upgraded.
Bazel is upgraded for both Java and C++.
This is ready but I'm not sure we want it... yet. Protobuf 22 had some serious C++ changes to the build system, dependencies, and required compilers that is delaying upgrading of some parts of the ecosystem (like our compiler plugin). Thus leaving this as draft until things appear ready to proceed.C core has committed to upgrading to 22.x, grpc/grpc#32606 . Some parts may still be ongoing (grpc/grpc#32851), but such things will block their next release.
The C++ upgrade will be handled separately. It can actually be upgraded completely independently (before or after) from Java.