help please: use of closed network connection

[jeyrce]

Version: 0.11.0

Description:

the server received a client connection, but not worked

Error logs:

level=debug ts=2022-06-23T03:38:35.50506839Z caller=server.go:295 component=server clientId=1 clientIp=10.20.15.103:37264 event="Client connected"
level=info ts=2022-06-23T03:38:35.50521604Z caller=server.go:90 component=driver clientId=1 remoteAddr=10.20.15.103:37264 nbClients=1 event="Client connected"
level=error ts=2022-06-23T03:38:35.50597612Z caller=client_handler.go:363 component=server clientId=1 err="set tcp 10.20.15.104:2121: use of closed network connection" event="Network error"
level=error ts=2022-06-23T03:38:35.50706325Z caller=client_handler.go:416 component=server clientId=1 err="read tcp 10.20.15.104:2121->10.20.15.103:37264: use of closed network connection" event="Network error"
level=info ts=2022-06-23T03:38:35.5070922Z caller=server.go:111 component=driver clientId=1 remoteAddr=10.20.15.103:37264 nbClients=0 event="Client disconnected"
level=debug ts=2022-06-23T03:38:35.50711167Z caller=server.go:300 component=server clientId=1 clientIp=10.20.15.103:37264 event="Client disconnected"
level=debug ts=2022-06-23T03:38:35.50712945Z caller=client_handler.go:312 component=server clientId=1 err="close tcp 10.20.15.104:2121->10.20.15.103:37264: use of closed network connection" event="Problem closing control connection"

[fclairamb]

@jeyrce what is your FTP client? It looks like it instantly disconnects after opening the connection.

[jeyrce]

@fclairamb Just golang client code, but seems make no effect for logic, only error log

[ilog2000]

I have the same issue. Windows 10. The client - Far manager's NetBox (go farmanager.com, download, install, press Alt-F1, select NetBox, press Shift-F4 to create a session, select FTP with no encryption, add 192.168.x.x 2121, set plaintext username/password, try to connect).

Console logs:

level=debug component=server clientId=5 clientIp=192.168.2.102:50579 event="Client connected"
level=info component=driver clientId=5 remoteAddr=192.168.2.102:50579 nbClients=1 event="Client connected"
level=error component=server clientId=5 err="set tcp 192.168.2.152:2121: use of closed network connection" event="Network error"
level=error component=server clientId=5 err="read tcp 192.168.2.152:2121->192.168.2.102:50579: use of closed network connection" event="Network error"
level=info component=driver clientId=5 remoteAddr=192.168.2.102:50579 nbClients=0 event="Client disconnected"
level=debug component=server clientId=5 clientIp=192.168.2.102:50579 event="Client disconnected"
level=debug component=server clientId=5 err="close tcp 192.168.2.152:2121->192.168.2.102:50579: use of closed network connection" event="Problem closing control connection"

The client constantly tries to connect, being disconnected, re-requests the password to try again.

Config is simple

{
  "version": 1,
  "passive_transfer_port_range": {
    "start": 2122,
    "end": 2130
  },
  "accesses": [
    {
      "user": "user",
      "pass": "pass",
      "fs": "os",
      "params": {
        "basePath": "C:\\temp"
      }
    }
  ]
}

[SkeLLLa]

Got the same issue on linux with latest version and "Dolphin" client. Also I have v0.13.0 installed on arm (pi) and it works without such issue. Will try 0.13 in docker mode and check whether it some bug introduced in 0.14.0.