InvalidOperationException：读取器关闭时无效尝试调用MetaData

Question

所以我在aaax调用一个预先输入文本框（bootstrap）时间歇性地收到此错误。重现很难，所以我没有取得多大进展。我怀疑它是由用户在输入中输入不会产生可发酵物的字符引起的。然后他们键入有效字符，第二个查询抛出此异常，尚未能证明这一点。有什么想法吗？

System.Data.SqlClient.SqlDataReader:172:in `get_MetaData'
System.Data.SqlClient.SqlDataReader:23:in `CheckMetaDataIsReady'
System.Data.SqlClient.SqlDataReader:8:in `GetName'
Dapper.SqlMapper+<>c__DisplayClass50:45:in `<GetDapperRowDeserializer>b__4f'
Dapper.SqlMapper+<QueryInternal>d__d`1:421:in `MoveNext'
System.Collections.Generic.List`1:119:in `.ctor'
System.Linq.Enumerable:20:in `ToList'
Brew.Controllers.RecipeFermentableController:46:in `GetFermentables'

方法：

[AllowAnonymous]
public JsonResult GetFermentables(string query)
{
    try
    {
        using (var connection = ConnectionHelper.GetOpenConnection())
        {
            var fermentables = connection.Query(@"select top 10 Id, Name from Fermentables
                                                where Name like '%'+@query+'%' order by Name", new {query});
            return Json(fermentables.Select(s => new {s.Id, s.Name}), JsonRequestBehavior.AllowGet);


        }
    catch (Exception e)
    {
        e.SendToAirbrake();
        throw;
    }
}

GetOpenConnection内部：

var connectionString = ConfigurationManager.ConnectionStrings["BrewDb"].ToString();
var connection = new SqlConnection(connectionString);
connection.Open();
return new StackExchange.Profiling.Data.ProfiledDbConnection(connection,MiniProfiler.Current);