Using docker to run syncthing relay server, error message in the log

xieyangwanmu · October 5, 2024, 9:56am

Hello， When I run the syncthing relay server using docker, have an error message

root@myserver:~/docker/syncthing/discovery-and-relay# docker logs -f b5
2024/10/05 09:39:40 main.go:140: strelaysrv v1.27.12 "Gold Grasshopper" (go1.22.6 linux-amd64) docker@github.syncthing.net 2024-09-06 07:15:45 UTC [noupgrade]
2024/10/05 09:39:40 main.go:146: Connection limit 838860
2024/10/05 09:39:40 main.go:185: ID: 
2024/10/05 09:39:40 main.go:266: URI: relay://0.0.0.0:22067/
2024/10/05 09:40:40 listener.go:46: Listener failed to accept: failed to identify socket type
2024/10/05 09:41:40 listener.go:46: Listener failed to accept: failed to identify socket type
2024/10/05 09:42:40 listener.go:46: Listener failed to accept: failed to identify socket type
2024/10/05 09:43:40 listener.go:46: Listener failed to accept: failed to identify socket type
2024/10/05 09:44:40 listener.go:46: Listener failed to accept: failed to identify socket type
2024/10/05 09:45:40 listener.go:46: Listener failed to accept: failed to identify socket type
2024/10/05 09:46:40 listener.go:46: Listener failed to accept: failed to identify socket type
2024/10/05 09:47:40 listener.go:46: Listener failed to accept: failed to identify socket type
2024/10/05 09:48:40 listener.go:46: Listener failed to accept: failed to identify socket type
2024/10/05 09:49:40 listener.go:46: Listener failed to accept: failed to identify socket type
2024/10/05 09:49:42 listener.go:54: Listener accepted connection from 112.20.96.202:33282 tls true
2024/10/05 09:49:42 listener.go:123: Message protocol.JoinRelayRequest from IJEERUR-UBL47AU-XXXXXX
2024/10/05 09:50:41 listener.go:46: Listener failed to accept: failed to identify socket type
2024/10/05 09:50:42 listener.go:123: Message protocol.Pong from IJEERUR-UBL47AU-XXXXXX
2024/10/05 09:51:41 listener.go:46: Listener failed to accept: failed to identify socket type

What does this error message mean?

listener.go:46: Listener failed to accept: failed to identify socket type

This is my docker-compose file

services:
  syncthing_relay_server:
    image: syncthing/relaysrv:latest
    container_name: syncthing-relay-server
    command: -debug -pools="" -listen=":22067"
    environment:
      - PUID=1000
      - PGID=1000
    volumes:
      - ./strelaysrv:/var/strelaysrv
    ports:
      - 42067:22067
      - 42070:22070
    restart: always

calmh · October 5, 2024, 9:59am

I don’t know, but I’m running strelaysrv under Kubernetes and don’t see this error. If it works I’d be inclined to ignore it.

bt90 · October 5, 2024, 10:18am

Looks like the error is triggered here:

github.com

syncthing/syncthing/blob/6d64daaba326ba8378c700e00a31e425c7c90579/lib/tlsutil/tlsutil.go#L214


      
          
          	union := &UnionedConnection{Conn: conn}
          
          	conn.SetReadDeadline(time.Now().Add(1 * time.Second))
          	n, err := conn.Read(union.first[:])
          	conn.SetReadDeadline(time.Time{})
          	if err != nil || n == 0 {
          		// We hit a read error here, but the Accept() call succeeded so we must not return an error.
          		// We return the connection as is with a special error which handles this
          		// special case in Accept().
          		return conn, false, ErrIdentificationFailed
          	}
          
          	return union, union.first[0] == 0x16, nil
          }
          
          type UnionedConnection struct {
          	first     [1]byte
          	firstDone bool
          	net.Conn
          }

Under which conditions does the read fail?

system · November 4, 2024, 10:18am

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