gRPC Core sets SO_REUSEPORT by default and I believe that's why you are
running into this. To disable this, you can set the channel argument
GRPC_ARG_ALLOW_REUSEPORT
<https://source.corp.google.com/piper///depot/google3/third_party/grpc/include/grpc/impl/codegen/grpc_types.h;bpv=1;bpt=1;rcl=348724940;l=295?gsn=GRPC_ARG_ALLOW_REUSEPORT&gs=kythe%3A%2F%2Fgoogle3%3Flang%3Dc%252B%252B%3Fpath%3Dthird_party%2Fgrpc%2Finclude%2Fgrpc%2Fimpl%2Fcodegen%2Fgrpc_types.h%23GRPC_ARG_ALLOW_REUSEPORT%2523m%254013727>
to
0.
On Thursday, December 3, 2020 at 4:16:02 PM UTC-8 hek...@gmail.com wrote:
> int bound_port=0;
> std::string server_address("0.0.0.0:50051");
> builder.AddListeningPort(server_address,
> grpc::SslServerCredentials(ssl_options) &bound_port);
> builder.RegisterService(&service);
> std::unique_ptr server(builder.BuildAndStart());
> if(bound_port == 0) { cout<<"port already in use!" << endl; }
>
> I don't know why above code is not work, the bound_port return always is
> 50051, I can't get 0 as expected when port already in use.
>
> Thanks for your help in advance!
>
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