romankarlstetter commented on code in PR #37689:
URL: https://github.com/apache/arrow/pull/37689#discussion_r1325714377


##########
cpp/src/arrow/flight/transport/grpc/grpc_server.cc:
##########
@@ -598,7 +598,7 @@ class GrpcServerTransport : public 
internal::ServerTransport {
     } else if (scheme == kSchemeGrpcUnix) {
       std::stringstream address;
       address << "unix:" << uri.path();
-      builder.AddListeningPort(address.str(), 
::grpc::InsecureServerCredentials());

Review Comment:
   > Looks like this needs to be done above as well for the TLS branch
   
   Hm, I don't really get what you're referring to.
   
   
   
   
   
   > Plus, for domain sockets, port will still be 0 right?
   
   Yes, that's probably correct (however, I don't have any practical experience 
with domain sockets in this context).
   That would mean that adding the port here does not make sense in the first 
place and we would need to check below that `scheme != kSchemeGrpcUnix` for 
issuing that _port bind specific_ error message.
   
   What do you think?
   



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