I have a sporadic error that is causing my system to hang/crash. here
are the details
I'm using Castle Monorail with my own Nh HttpModule to open/close
sessions
I'm using NH & Nh.ByteCode.Castle 2.1.0.2002 and NH.SysCache2
2.1.0.3001
I'm using TransactionScope (TS) to manage the session's transactions
The website uses 2 different session factories. So the TS is promoted
to a distributed transaction (if I understand TS correctly).
the full exception is
Exception information:
Exception type: InvalidOperationException
Exception message: A TransactionScope must be disposed on the same
thread that it was created.
Thread information:
Thread ID: 5
Thread account name: NT AUTHORITY\NETWORK SERVICE
Is impersonating: True
Stack trace: at System.Transactions.TransactionScope.Dispose()
at StockBook.Web.Infrastructure.Web.SessionModule.DisposeOfSessions
(Object sender, EventArgs e) in ...SessionModule.cs:line 45
at
System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute
()
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step,
Boolean& completedSynchronously)
the module
public class SessionModule : IHttpModule
{
private TransactionScope transaction;
public void Init(HttpApplication context)
{
context.BeginRequest += OpenSessions;
context.EndRequest += DisposeOfSessions;
}
private void OpenSessions(object sender, EventArgs e)
{
var options = new TransactionOptions {IsolationLevel =
IsolationLevel.ReadCommitted};
transaction = new
TransactionScope(TransactionScopeOption.Required,
options);
WindsorContainerAccessorUtil
.ObtainContainer()
.ResolveAll<ISessionFactory>()
.Select(f => f.OpenSession())
.ForEach(s =>
ManagedWebSessionContext.Bind(HttpContext.Current,
s));
}
private void DisposeOfSessions(object sender, EventArgs e)
{
if (HttpContext.Current.Error == null)
{
transaction.Complete();
}
WindsorContainerAccessorUtil
.ObtainContainer()
.ResolveAll<ISessionFactory>()
.Select(f =>
ManagedWebSessionContext.Unbind(HttpContext.Current,
f))
.ForEach(s => s.Dispose())
//ERROR THROWN HERE
transaction.Dispose();
}
public void Dispose()
{
}
}
I'm using Rhino.ServiceBus with Rhino.Queues
RQ uses TransactionScope to manage the service bus messaging
I have a PostInsert, Update and Delete listener which will send a
message, which ultimately creates a TS in RQ. I'm not sure if this is
related because the errors only happens with urls for reading data,
not writing.
Our end users say they are able to use the system, then leave a page
open for awhile. When they come back to the system this error is
thrown. They are only reporting this in the morning, but the logs show
this happens throughout the day.
We also have Sql backups happening throughout the day as well. Could
this effect a distributed transaction (thus effecting the TS)?
What is happening is clear by the exception message, I just don't
understand how or why? Where would I look to trouble shoot this kind
of thing?
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