I am adding content in c# code and it is generating exceptions

Exception thrown: 'Lucene.Net.QueryParsers.QueryParser.LookaheadSuccess' in Lucene.Net.dll Exception thrown: 'System.IO.IOException' in Lucene.Net.dll Exception thrown: 'System.IO.IOException' in Lucene.Net.dll Exception thrown: 'System.NotSupportedException' in Lucene.Net.dll

Is this normal behavior?

This video shows the problem https://www.youtube.com/watch?v=0ZaZ5H0ZKQA

The code is

public class ProductsController : RenderMvcController {

private static Random random = new Random();

public override ActionResult Index(ContentModel model)
{
  AddContent();

  return base.Index(model);
}


private void AddContent()
{
  int length = Price(5, 20);

  string title = Title(length);
  string description = "description";
  string price = Price(0, 100).ToString();

  var content = Services.ContentService.Create(title, 1061, "product");

  content.SetValue("title", title);
  content.SetValue("description", description);
  content.SetValue("price", price);

  //exceptions thrown here
  Services.ContentService.Save(content);
}


public static string Title(int length)
{
  const string chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
  return new string(Enumerable.Repeat(chars, length)
    .Select(s => s[random.Next(s.Length)]).ToArray());
}


private int Title()
{
  Random r = new Random();
  return r.Next(0, 100); //for ints
}


private int Price(int min, int max)
{
  Random r = new Random();
  return r.Next(min, max); //for ints
}

}

It also seems very slow to add content. To takes 7 seconds to add 10 records:

  for (int i = 0; i < 10; i++)
  {
    AddContent();
  }

I was wondering if that was normal?