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extend connection check #38

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extend connection check #38

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8 changes: 7 additions & 1 deletion Graphite/CarbonConnectionPool.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -136,6 +136,12 @@ private async Task<bool> TestAsync(TcpClient client, CancellationToken cancellat
try
{
await _formatter.TestConnectionAsync(client.GetStream(), cancellationToken).ConfigureAwait(false);
//https://stackoverflow.com/a/2661876/19671
var socket = client.Client;
if (!socket.Connected) return false;
var poll = socket.Poll(1000, SelectMode.SelectRead);
var empty = socket.Available == 0;
if (poll && empty) return false;
return true;
}
catch (IOException ex) when (ex.InnerException is SocketException se && CheckSocketException(se))
Expand Down Expand Up @@ -181,4 +187,4 @@ public bool Return(TcpClient obj)
}
}
}
}
}