C++ helloworld example does not work properly

[chenicel]

What version of gRPC and what language are you using?

1.25.0 c++

What operating system (Linux, Windows,...) and version?

ubuntu18.04

What runtime / compiler are you using (e.g. python version or version of gcc)

gcc7.4.0

What did you do?

If possible, provide a recipe for reproducing the error. Try being specific and include code snippets if helpful.
Compiled/installed gRPC according to the installation instructions.
Compiled examples/cpp/helloworld example.
Tried running ./greeter_server

What did you expect to see?

Received return information from the server

What did you see instead?

D1122 19:58:44.703447994    7907 ev_posix.cc:174]            Using polling engine: epollex
D1122 19:58:44.703681146    7907 dns_resolver_ares.cc:503]   Using ares dns resolver

The client runs without any output

[yjkhtddx]

I have the same problem
Server: BuildAndStart hangs
Client: CreateChannel hangs

Wireshark cannot grab any network packets to the destination IP

[yjkhtddx]

#21280 (comment)

It solves my problem in this way, but I'm not sure if this modification will generate other bugs.

[kingsenye]

I have the same problem too~ what shuod i do...

[luojiego]

I have the same problem too

[veblush]

Duplicate of #21280