Hangs on 1.7.3

[NathanPages]

I have been trying to use this library with julia 1.7.3:

• https://github.com/grpc/grpc/blob/master/examples/cpp/helloworld/greeter_server.cc as the server
• Adding option py_generic_services = true; to the proto file https://github.com/grpc/grpc/blob/master/examples/protos/helloworld.proto as recommended in the doc
• Generating the julia code from protobuf:

using gRPCClient
gRPCClient.generate("PATH_TO_GRPC/grpc/examples/protos/helloworld.proto")

• Calling on the julia side using:

using gRPCClient

# Helloworld related
include("PATH_TO_PROTOCODE/HelloworldClients.jl")
using .HelloworldClients
import .HelloworldClients: HelloRequest, HelloReply, SayHello

Base.show(io::IO, hello_request::HelloRequest) =
    print(io, hello_request.name)
Base.show(io::IO, hello_reply::HelloReply) =
    print(io, hello_reply.message)

hello_request = HelloRequest(; name ="Something");
client = GreeterBlockingClient("0.0.0.0:50051");

result, status = SayHello(client,hello_request);
println(gRPCCheck(status))
println(result)

The script above hangs at the line SayHello(client,hello_request); with no error message.

I have tried with Julia 1.6.6 and it works no hanging.

[manuelbb-upb]

@NathanPages would you be willing to try this fork?
https://github.com/manuelbb-upb/gRPCClient.jl

I saw this issue by chance and think it is related to #24.
At least I can replicate that hanging behavior in Julia 1.7.3 using the original version and it disappears using the fork.
But please note that I made that fork for a personal project and I did not thoroughly test it. It passes all unit tests locally but is missing some compatibility for older Julia versions which I was too lazy to re-incorporate when I got it working.