Example echo_server/interactive_client not connected each other

[hxshandle]

I follow the example document and try to make interactive_client connect to echo_server, but it seems the interactive_client hangs on initialization.

Environment:
Both mac/windows have the same issue.

Reproduce steps:

1. Run cargo run --example echo_server in terminal A
2. Run cargo run --example interactive_client in terminal B

[arkCyber]

I have the same error！

[BasilYes]

Fixed this (little bit diferent from current implementation but it's work) you can check my PR or my fork https://github.com/BasilYes/mcpr