ASP.NET Web Forms and MySql Entity Framework: “Nested transactions are not supported” (no replies)

I have an ASP.NET web forms application, using the .Net Connector for MySql Entity Framework.

I've made a web application using MySql in the past, and never ran into this issue.

I'm currently getting ~40000 page views a day, and each day about 10 errors of 'Nested transactions are not supported.'

I can't figure out why it happens at all, or why it happens only once in awhile.

In a Master page Preload event I get an integer ID for the user and save it to a public variable:

using (var entity = new Entities())
{
var user = entity.my_aspnet_users.Single(i => i.name == Context.User.Identity.Name);
UserID = user.id;
if (HttpContext.Current.Request.Url.AbsolutePath != "###" && HttpContext.Current.Request.Url.AbsolutePath != "###")
{
if (user.Player == null)
Response.Redirect("###", true);
else
PlayerID = user.Player.PlayerID;
}
}
And then on the page:

using (var entity = new Entities())
if (entity.Players.Count(i => ###) == 1)
{
var user = entity.my_aspnet_users.Single(i => i.id == Master.UserID);
if (user.Player == null)
{
user.Player = entity.Players.Single(i => ###);
entity.SaveChanges();
}
Response.Redirect("###", false);
}
The error gets thrown on SaveChanges(). I don't know why it only happens sometimes. I also sometimes get the same error when a user registers on the site or resets their password using the standard ASP.NET control and MySql membership provider.

Anyway, for one, I thought nested transactions were allowed in MySql? Is there a setting I need to set? My MySql instance is 5.6.17 and I believe using default parameters - set up in Amazon RDS.

I'm using the Connector/Net 6.9.3, which I believe is still the current one in Nuget.

Does 'User.Identity.Name' access the database? Do you have any idea on where I can look to solve this?

Here's the stack trace of some exceptions if helpful:

Exception on example code: System.Web.HttpUnhandledException (0x80004005): Exception of type 'System.Web.HttpUnhandledException' was thrown. ---> System.Data.Entity.Core.EntityException: An error occurred while starting a transaction on the provider connection. See the inner exception for details. ---> System.InvalidOperationException: Nested transactions are not supported.

at MySql.Data.MySqlClient.ExceptionInterceptor.Throw(Exception exception)

at MySql.Data.MySqlClient.MySqlConnection.Throw(Exception ex)

at MySql.Data.MySqlClient.MySqlConnection.BeginTransaction(IsolationLevel iso)

at MySql.Data.MySqlClient.MySqlConnection.BeginDbTransaction(IsolationLevel isolationLevel)

at System.Data.Common.DbConnection.BeginTransaction(IsolationLevel isolationLevel)

at System.Data.Entity.Infrastructure.Interception.DbConnectionDispatcher.b__0(DbConnection t, BeginTransactionInterceptionContext c)

at System.Data.Entity.Infrastructure.Interception.InternalDispatcher1.Dispatch[TTarget,TInterceptionContext,TResult](TTarget target, Func3 operation, TInterceptionContext interceptionContext, Action3 executing, Action3 executed)

at System.Data.Entity.Infrastructure.Interception.DbConnectionDispatcher.BeginTransaction(DbConnection connection, BeginTransactionInterceptionContext interceptionContext)

at System.Data.Entity.Core.EntityClient.EntityConnection.<>c__DisplayClassf.b__d()

at System.Data.Entity.Infrastructure.DefaultExecutionStrategy.Execute[TResult](Func`1 operation)

at System.Data.Entity.Core.EntityClient.EntityConnection.BeginDbTransaction(IsolationLevel isolationLevel)

--- End of inner exception stack trace ---

at System.Data.Entity.Core.EntityClient.EntityConnection.BeginDbTransaction(IsolationLevel isolationLevel)

at System.Data.Entity.Core.EntityClient.EntityConnection.BeginTransaction()

at System.Data.Entity.Core.Objects.ObjectContext.ExecuteInTransaction[T](Func`1 func, IDbExecutionStrategy executionStrategy, Boolean startLocalTransaction, Boolean releaseConnectionOnSuccess)

at System.Data.Entity.Core.Objects.ObjectContext.SaveChangesToStore(SaveOptions options, IDbExecutionStrategy executionStrategy, Boolean startLocalTransaction)

at System.Data.Entity.Core.Objects.ObjectContext.<>c__DisplayClass2a.b__27()

at System.Data.Entity.Infrastructure.DefaultExecutionStrategy.Execute[TResult](Func`1 operation)

at System.Data.Entity.Core.Objects.ObjectContext.SaveChangesInternal(SaveOptions options, Boolean executeInExistingTransaction)

at System.Data.Entity.Core.Objects.ObjectContext.SaveChanges(SaveOptions options)

at System.Data.Entity.Internal.InternalContext.SaveChanges()

at System.Data.Entity.Internal.LazyInternalContext.SaveChanges()

at System.Data.Entity.DbContext.SaveChanges()

at ###.Account.###.ButtonSubmit###_Click(Object sender, EventArgs e)

at System.Web.UI.WebControls.Button.OnClick(EventArgs e)

at System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument)

at System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument)

at System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument)

at System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData)

at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

at System.Web.UI.Page.HandleError(Exception e)

at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

at System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

at System.Web.UI.Page.ProcessRequest()

at System.Web.UI.Page.ProcessRequestWithNoAssert(HttpContext context)

at System.Web.UI.Page.ProcessRequest(HttpContext context)

at ASP.account_###.ProcessRequest(HttpContext context)

at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()

at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

Exception on creating a user: System.Web.HttpUnhandledException (0x80004005): Exception of type 'System.Web.HttpUnhandledException' was thrown. ---> System.InvalidOperationException: Nested transactions are not supported.

at MySql.Data.MySqlClient.ExceptionInterceptor.Throw(Exception exception)

at MySql.Data.MySqlClient.MySqlConnection.Throw(Exception ex)

at MySql.Data.MySqlClient.MySqlConnection.BeginTransaction(IsolationLevel iso)

at MySql.Data.MySqlClient.MySqlConnection.BeginTransaction()

at MySql.Web.Security.MySQLMembershipProvider.GetUser(Object providerUserKey, Boolean userIsOnline)

at MySql.Web.Security.MySQLMembershipProvider.GetUser(String username, Boolean userIsOnline)

at MySql.Web.Security.MySQLMembershipProvider.CreateUser(String username, String password, String email, String passwordQuestion, String passwordAnswer, Boolean isApproved, Object providerUserKey, MembershipCreateStatus& status)

at System.Web.UI.WebControls.CreateUserWizard.AttemptCreateUser()

at System.Web.UI.WebControls.CreateUserWizard.OnNextButtonClick(WizardNavigationEventArgs e)

at System.Web.UI.WebControls.Wizard.OnBubbleEvent(Object source, EventArgs e)

at System.Web.UI.WebControls.CreateUserWizard.OnBubbleEvent(Object source, EventArgs e)

at System.Web.UI.Control.RaiseBubbleEvent(Object source, EventArgs args)

at System.Web.UI.WebControls.Button.OnCommand(CommandEventArgs e)

at System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument)

at System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument)

at System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument)

at System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData)

at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

at System.Web.UI.Page.HandleError(Exception e)

at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

at System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

at System.Web.UI.Page.ProcessRequest()

at System.Web.UI.Page.ProcessRequestWithNoAssert(HttpContext context)

at System.Web.UI.Page.ProcessRequest(HttpContext context)

at ASP.register_aspx.ProcessRequest(HttpContext context)

at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()

at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)