What is the reason of “Transaction context in use by another session”

Question

I\'m looking for a description of the root of this error: \"Transaction context in use by another session\".

I get it sometimes in one of my unittests so I can\'t pr

Answer 1

You must create a DependentTransaction for each thread an then inside the thread create & open the db connection inside a TransacctionScope using the dependentTransaction in the ctor.

            //client code / main thread
            using (TransactionScope scope = new TransactionScope(TransactionScopeOption.RequiresNew, timeout))
            {
                Transaction currentTransaction = Transaction.Current;
                currentTransaction.TransactionCompleted += OnCompleted;
                DependentTransaction dependentTransaction;
                int nWorkers = Config.Instance.NumDBComponentWorkers;
                for (int i = 0; i < nWorkers; i++)
                {
                    dependentTransaction = currentTransaction.DependentClone(DependentCloneOption.BlockCommitUntilComplete);
                    this.startWorker(dependentTransaction);
                }
                do
                {
                    //loop + wait
                    Thread.Sleep(150);
                } while (this.status == DBComponentStatus.Running);
                //No errors-commit transaction
                if (this.status == DBComponentStatus.Finished && this.onCanCommit())
                {
                    scope.Complete();
                }
            }

    //workers
    protected override void startWorker(DependentTransaction dependentTransaction)
    {
        Thread thread = new Thread(workerMethod);
        thread.Start(dependentTransaction);
    }

    protected override void workerMethod(object transaction)
    {
        int executedStatements = 0;
        DependentTransaction dependentTransaction;
        dependentTransaction = transaction as DependentTransaction;
        System.Diagnostics.Debug.Assert(dependentTransaction != null); //testing
        try
        {
            //Transaction.Current = dependentTransaction;
            using (TransactionScope scope = new TransactionScope(dependentTransaction))
            {
                using (SqlConnection conn = new SqlConnection(this.GetConnectionString(this.parameters)))
                {
                    /* Perform transactional work here */
                    conn.Open();
                    string statement = string.Empty;
                    using (SqlCommand cmd = conn.CreateCommand())
                    {

                    }
                }
                //No errors-commit transaction
                if (this.status == DBComponentStatus.Finished)
                {
                    scope.Complete();
                }
            }
        }
        catch (Exception e)
        {
            this.status = DBComponentStatus.Aborted;
        }
        finally
        {
            dependentTransaction.Complete();
            dependentTransaction.Dispose();
        }
    }