StackOverflowException caused by Bus.Publish() or subscription?

Question

I have an agent that employs a saga to track incoming messages of a given type until a Timeout message is received. In the Timeout handler, I have the following:

public override void Timeout(object state)
        {
            // If Data.IsNull: Do nothing!!! Report to log only.
            Logger.Debug("=========================================================================");
            Logger.Debug(string.Format("Timeout message received. State: {0}.", state.ToString()));

            QuickBatch qbBuilder = new QuickBatch();
            // Create new message and publish it
            BankRequestBatchClosed eventMessage = Bus.CreateInstance<BankRequestBatchClosed>();

            eventMessage.UniqueBatchIdentifier = qbBuilder.GenerateUniqueBatchIdentifier(QuickBatch.QB_BATCHTYPE_CC);
            eventMessage.ScheduleBatchID = this.Data.ScheduleBatchID;
            eventMessage.EventDate = DateTime.Now;
            eventMessage.EventID = Guid.NewGuid();
            eventMessage.TransactionItems = this.Data.PaymentRequestedTransactionItems;

            Logger.Debug("=========================================================================");
            Logger.Debug(string.Format("Timeout method about to send BankRequestBatchClosed message. UniqueBatchIdentifier: {0}",eventMessage.UniqueBatchIdentifier));

            Bus.Publish(eventMessage);
            Complete();
        }

TransactionItems is an ICollection

Here is TransactionDetail class:

   [Serializable]
    public class TransactionDetail
    {
        // Guid needed for NHibernate to store it in database. All
        // member variables are virtual for the same reason.
        public virtual Guid Id { get; set; }
        public virtual Int32 ScheduleBatchID { get; set; }
        public virtual Int32 PseudoSagaID { get; set; }
        public virtual String CreditCardNumber { get; set; }
        public virtual String ExpiryDate { get; set; }

        public virtual String AccountNumber { get; set; }
        public virtual String BSB { get; set; }

        public virtual Decimal Amount { get; set; }
        public virtual Int32 Firm_fk { get; set; }
        public virtual String FirmName { get; set; }
        public virtual TransactionType PaymentType { get; set; }
        // transaction number, max 15 chars, to use one of the following:
        public virtual int ApplicationPaymentInfo_fk { get; set; }
        public virtual BankRequestResponseSagaBase Parent { get; set; }
    }

If I don't have any subscriptions in place, the Bus.Publish() call goes through fine. If I have another service subscribed to it, I get the following error message:

An unhandled exception of type 'System.StackOverflowException' occurred in mscorlib.dll

There is no further information on the overflow other than this: {Cannot evaluate expression because the current thread is in a stack overflow state.}

I have my own SagaPersister, Profile and SagaRegistry but not sure if they are pertinent to this issue but can supply them if needed.

Answer 1

The one thing that looks a bit suspicious here is the BankRequestResponseSagaBase Parent property on your TransactionDetail object. It could be that you have a loop in your references that is causing your saga persister to blow up.