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attempt to fix connection loss issue #54

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attempt to fix connection loss issue #54

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23 changes: 22 additions & 1 deletion src/csharp/src/ZooKeeperNetEx/utils/SocketContext.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -74,7 +74,9 @@ public SocketAsyncOperation GetResult()

var socketAsyncEventArgs = _socketAsyncEventArgs;

if (socketAsyncEventArgs.LastOperation == SocketAsyncOperation.Receive && _socket.Available == 0)
if (socketAsyncEventArgs.LastOperation == SocketAsyncOperation.Receive
&& _socket.Available == 0
&& !IsSocketConnected())
{
socketAsyncEventArgs.SocketError = SocketError.ConnectionReset;
}
Expand All @@ -85,6 +87,25 @@ public SocketAsyncOperation GetResult()
}
return socketAsyncEventArgs.LastOperation;
}

private bool IsSocketConnected()
{
// based on https://learn.microsoft.com/en-us/dotnet/api/system.net.sockets.socket.connected

var originalBlockingState = _socket.Blocking;
try
{
_socket.Blocking = false;
_socket.Send(new byte[1], size: 0, SocketFlags.None);
}
catch (SocketException) { }
finally
{
_socket.Blocking = originalBlockingState;
}

return _socket.Connected;
}

private void ThrowIfDisposed()
{
Expand Down