EOF on visor shutdown in dmsghttp

[ersonp]

Describe the bug
There is an EOF warning message from public autoconnect and app_discovery retriers on visor shutdown. The issue may be that the retry func runs during the dmsghttp module shutdown process.

Environment information:

• OS: e.g. Linux
• Platform: Linux 5.11.0-43-generic x86_64

Steps to Reproduce
Steps to reproduce the behavior:

1. Run ./skywire-cli config gen -dirt
2. Change log_level to debug in the config
3. Run ./skywire-visor -c skywire-config.json and stop the visor with Ctrl+C after stun module is initilized (Might have to try multiple times)
4. See error

Actual behavior

[2021-12-31T10:24:01+05:30] INFO [4/13] [visor:shutdown:dmsg]: Module stopped cleanly. elapsed=320.701185ms
[2021-12-31T10:24:01+05:30] INFO [3/13] [visor:shutdown:dmsg_http]: Shutting down module...
[2021-12-31T10:24:01+05:30] INFO [dmsg_http:dmsgDC]: Stopped serving client!
[2021-12-31T10:24:01+05:30] INFO [dmsg_http:dmsgDC]: Stopped accepting streams. error="session shutdown" session=024716428e6315d954356e9ad72bea32bb2b41aab5a54a9b5cb4313964016e64d8
[2021-12-31T10:24:01+05:30] INFO [dmsg_http:dmsgDC]: Session closed. error=<nil>
[2021-12-31T10:24:01+05:30] DEBUG ClientSession.DialStream [dmsg_http:dmsgDC]: Stream closed on failure. close_error=<nil> dst_addr=038f751df4af75fb3d51f6693602bfe8289145e633ffdd1e67d686bea595f84d55:80 error="EOF" session=024716428e6315d954356e9ad72bea32bb2b41aab5a54a9b5cb4313964016e64d8
[2021-12-31T10:24:01+05:30] DEBUG ClientSession.DialStream [dmsg_http:dmsgDC]: Stream closed on failure. close_error=<nil> dst_addr=038f751df4af75fb3d51f6693602bfe8289145e633ffdd1e67d686bea595f84d55:80 error="EOF" session=024716428e6315d954356e9ad72bea32bb2b41aab5a54a9b5cb4313964016e64d8
[2021-12-31T10:24:02+05:30] WARN [app_discovery]: Failed to register service entry in discovery. Retrying... appName="skysocks" error="Get "dmsg://038f751df4af75fb3d51f6693602bfe8289145e633ffdd1e67d686bea595f84d55:80/security/nonces/02aa6fc7009d31622705cb3f2feaa8fe0da10c2ae081cf52e7ba7672bf097defad": EOF"
[2021-12-31T10:24:02+05:30] INFO [dmsg_http:dmsgDC]: All sessions closed.
[2021-12-31T10:24:02+05:30] WARN retrier [public_autoconnect]: Get "dmsg://038f751df4af75fb3d51f6693602bfe8289145e633ffdd1e67d686bea595f84d55:80/api/services?quantity=3&type=visor": EOF
[2021-12-31T10:24:02+05:30] WARN retrier [app_discovery]: Get "dmsg://038f751df4af75fb3d51f6693602bfe8289145e633ffdd1e67d686bea595f84d55:80/security/nonces/02aa6fc7009d31622705cb3f2feaa8fe0da10c2ae081cf52e7ba7672bf097defad": EOF appName="skysocks"
[2021-12-31T10:24:02+05:30] DEBUG [dmsg_http:dmsgDC]: Deleting entry. entry=    version: 
        sequence: 0
        registered at: 0
        static public key: 029bc0e047334db0161ca5b26db404d45c520477f321a81d079e46ddefd10f9017
        signature: 
        entry is registered as client. Related info: 
                delegated servers: 
                        024716428e6315d954356e9ad72bea32bb2b41aab5a54a9b5cb4313964016e64d8


[2021-12-31T10:24:02+05:30] DEBUG [dmsg_http:dmsgDC]: Entry Deleted successfully.
[2021-12-31T10:24:02+05:30] INFO [dmsg_http:dmsgDC]: Disconnected from dmsg network. error=<nil>
[2021-12-31T10:24:02+05:30] INFO [3/13] [visor:shutdown:dmsg_http]: Module stopped cleanly. elapsed=50.452952ms
[2021-12-31T10:24:02+05:30] INFO [2/13] [visor:shutdown:event_broadcaster]: Shutting down module...
[2021-12-31T10:24:02+05:30] INFO [2/13] [visor:shutdown:event_broadcaster]: Module stopped cleanly. elapsed=4.552828ms
[2021-12-31T10:24:02+05:30] INFO [1/13] [visor:shutdown:cli.listener]: Shutting down module...
2021/12/31 10:24:02 rpc.Serve: accept:accept tcp 127.0.0.1:3435: use of closed network connection
[2021-12-31T10:24:02+05:30] INFO [1/13] [visor:shutdown:cli.listener]: Module stopped cleanly. elapsed=4.554944ms
[2021-12-31T10:24:02+05:30] INFO [visor:shutdown]: Shutdown complete. Goodbye!

[ersonp]

[2022-02-08T10:17:59+05:30] INFO [dmsg_pty:cli-server]: Cleanly stopped serving.
[2022-02-08T10:17:59+05:30] INFO [6/14] [visor:shutdown:router.serve]: Module stopped cleanly. elapsed=9.397023ms
[2022-02-08T10:17:59+05:30] INFO [5/14] [visor:shutdown:router.serve]: Shutting down module...
[2022-02-08T10:17:59+05:30] INFO [dmsg_pty]: Serve() ended. error=<nil>
[2022-02-08T10:17:59+05:30] INFO [dmsg_pty]: Cleanly stopped serving. error="dmsg error 200 - local entity closed"
[2022-02-08T10:17:59+05:30] INFO [5/14] [visor:shutdown:router.serve]: Module stopped cleanly. elapsed=12.197792ms
[2022-02-08T10:17:59+05:30] INFO [4/14] [visor:shutdown:dmsg]: Shutting down module...
[2022-02-08T10:17:59+05:30] INFO [dmsgC]: Stopped serving client!
[2022-02-08T10:17:59+05:30] INFO [dmsgC]: Stopped accepting streams. error="session shutdown" session=024716428e6315d954356e9ad72bea32bb2b41aab5a54a9b5cb4313964016e64d8
[2022-02-08T10:17:59+05:30] INFO [dmsgC]: Session closed. error=<nil>
[2022-02-08T10:17:59+05:30] WARN github.com/skycoin/skywire/pkg/visor/dmsgtracker.(*Manager).updateAllTrackers [dmsg_trackers]: Removing dmsg client tracker. client_pk=02aa6fc7009d31622705cb3f2feaa8fe0da10c2ae081cf52e7ba7672bf097defad error="EOF"
[2022-02-08T10:17:59+05:30] INFO [dmsgC]: All sessions closed.
[2022-02-08T10:17:59+05:30] INFO [visor]: Dmsg client stopped serving. error="dmsg error 200 - local entity closed"
[2022-02-08T10:17:59+05:30] INFO [transport_manager]: Dmsg client stopped serving. error="dmsg error 200 - local entity closed"
[2022-02-08T10:18:00+05:30] INFO [4/14] [visor:shutdown:dmsg]: Module stopped cleanly. elapsed=523.852656ms
[2022-02-08T10:18:00+05:30] INFO [3/14] [visor:shutdown:dmsg_http]: Shutting down module...
[2022-02-08T10:18:00+05:30] INFO [dmsg_http:dmsgDC]: Stopped serving client!
[2022-02-08T10:18:00+05:30] INFO [dmsg_http:dmsgDC]: Session closed. error=<nil>
[2022-02-08T10:18:00+05:30] INFO [dmsg_http:dmsgDC]: Stopped accepting streams. error="session shutdown" session=024716428e6315d954356e9ad72bea32bb2b41aab5a54a9b5cb4313964016e64d8
[2022-02-08T10:18:00+05:30] INFO [dmsg_http:dmsgDC]: All sessions closed.
[2022-02-08T10:18:00+05:30] INFO [dmsg_http:dmsgDC]: Disconnected from dmsg network. error=<nil>
[2022-02-08T10:18:00+05:30] INFO [3/14] [visor:shutdown:dmsg_http]: Module stopped cleanly. elapsed=25.1559ms
[2022-02-08T10:18:00+05:30] INFO [2/14] [visor:shutdown:cli.listener]: Shutting down module...
2022/02/08 10:18:00 rpc.Serve: accept:accept tcp 127.0.0.1:3435: use of closed network connection
[2022-02-08T10:18:00+05:30] INFO [2/14] [visor:shutdown:cli.listener]: Module stopped cleanly. elapsed=4.610284ms
[2022-02-08T10:18:00+05:30] INFO [1/14] [visor:shutdown:event_broadcaster]: Shutting down module...
[2022-02-08T10:18:00+05:30] INFO [1/14] [visor:shutdown:event_broadcaster]: Module stopped cleanly. elapsed=4.633007ms
[2022-02-08T10:18:00+05:30] INFO [visor:shutdown]: Shutdown complete. Goodbye!