OnClientConnected NetUV.Core.Native.OperationException: ENOTCONN (ENOTCONN) : ENOTCONN : socket is not connected
Description
I'm not particularly sure if this is an issue, since I can perceive no meaningful effect on my pool.

Steps to Reproduce
Unknown, no major changes (if any at all were made).

Added 'check' to haproxy load balancer (no change when removed)
It just popped up this afternoon when I was checking my logs. It is possible that a user is doing something unauthorized? Or dropped off after the initial connection?

Expected behavior
Normal mining activity.

Actual behavior
Appears to still be normal mining activity, but with this accompanying log a few times a second.


[2018-03-09 12:24:06.1769] [E] [electroneum] OnClientConnected NetUV.Core.Native.OperationException: ENOTCONN (ENOTCONN) : ENOTCONN : socket is not connected
   at NetUV.Core.Native.NativeMethods.ThrowOperationException(uv_err_code error)
   at NetUV.Core.Native.NativeMethods.TcpGetPeerName(IntPtr handle)
   at NetUV.Core.Handles.Tcp.GetPeerEndPoint()
   at MiningCore.Stratum.StratumServer.OnClientConnected(Tcp con, IPEndPoint endpointConfig, Loop loop)    at NetUV.Core.Native.NativeMethods.ThrowOperationException(uv_err_code error)
   at NetUV.Core.Native.NativeMethods.TcpGetPeerName(IntPtr handle)
   at NetUV.Core.Handles.Tcp.GetPeerEndPoint()
   at MiningCore.Stratum.StratumServer.OnClientConnected(Tcp con, IPEndPoint endpointConfig, Loop loop)
[2018-03-09 12:24:06.7688] [E] [electroneum] OnClientConnected NetUV.Core.Native.OperationException: ENOTCONN (ENOTCONN) : ENOTCONN : socket is not connected
   at NetUV.Core.Native.NativeMethods.ThrowOperationException(uv_err_code error)
   at NetUV.Core.Native.NativeMethods.TcpGetPeerName(IntPtr handle)
   at NetUV.Core.Handles.Tcp.GetPeerEndPoint()
   at MiningCore.Stratum.StratumServer.OnClientConnected(Tcp con, IPEndPoint endpointConfig, Loop loop)    at NetUV.Core.Native.NativeMethods.ThrowOperationException(uv_err_code error)
   at NetUV.Core.Native.NativeMethods.TcpGetPeerName(IntPtr handle)
   at NetUV.Core.Handles.Tcp.GetPeerEndPoint()
   at MiningCore.Stratum.StratumServer.OnClientConnected(Tcp con, IPEndPoint endpointConfig, Loop loop)
Reproduces how often
A few times every second. It appears to happen whenever a client connects.

Version
Release 0.19, Ubuntu 16.04

Additional Information
None