Target with two handrels can not reconnect to server

[dody]

Target with 2 handlers (tunnel_target) can connect to server but when it disconnects it cannot connect again to server.

To reproduce:

1. Content of target.cfg:

   
   tunnel_server_default: <
   tunnel_server_address: "localhost:5555"
   >

tunnel_target: < target: "target1" type: "SSH" dial_address: "localhost:22"

tunnel_target: < target: "target1" type: "GNMI" dial_address: "localhost:9339"

2. Start server:

   server -tunnel_address "localhost:5555"

3. Start target:

   target  -config_file "target.cfg"

4. kill target and start it again as in step 3.

Server log:

2021/11/12 14:05:35 handling target addition: (target1:SSH)
2021/11/12 14:05:35 handling target addition: (target1:GNMI)
2021/11/12 14:05:37 handling target deletion: (target1:SSH)

In server log there is missing:

• one deletion of target handler
• two additions of handlers after target is restarted

Target is also not reachable from client.

[jxx-gg]

Thanks for pointing it out. https://github.com/openconfig/grpctunnel/pull/48 should fix the issue.