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Question

I am writing a basic MSMQ producer and consumer and I'm getting tripped up when trying to receive a message as part of a transaction.

The queue is on a Windows Server 2003 machine and it is definitely set to transactional. My producer is able to put messages onto the queue as part of a transaction with no problems. I can read the messages off the queue without problems as well, as long as I don't do it in a transaction. What am I doing wrong?

This is the block of code with which I'm trying to consume the queue:

using (MessageQueue msgQ = new MessageQueue(myQueueName))
{                   
    try
    {
        using (MessageQueueTransaction msgTx = new MessageQueueTransaction())
        {
            msgTx.Begin();

            msg = msgQ.Receive(new TimeSpan(0, 0, 0, 0, 1000), msgTx);
            Console.WriteLine("Message " + msg.LookupId.ToString() + " received");
            msg.Formatter = new XmlMessageFormatter(new string[] { "System.String,mscorlib" });
            if (ParseMessage(msg.Body.ToString()))
            {
                msgTx.Commit();
                Console.WriteLine("Message " + msg.LookupId.ToString() + " delivered");
            }
            else
            {
                msgTx.Abort();
                Console.WriteLine("Message " + msg.LookupId.ToString() + " not delivered");
            }
        }
    }
    catch (MessageQueueException exc)
    {
        if (exc.MessageQueueErrorCode == MessageQueueErrorCode.IOTimeout)
            Console.WriteLine("No more messages available");
        else
            Console.WriteLine("Unknown error encountered while receiving");
    }
}

So if I remove the using (MessageQueueTransaction ...) encapsulation, everything works fine, except of course that I can't commit or abort the transaction depending on the boolean outcome of ParseMessage(...)

When I add the transactional bits though, I get a MessageQueueException as soon as I hit the msgQ.Receive(...) line. The exception message and base is null and the MessageQueueErrorCode is 0xc00e008b which, according to this MSDN page translates to:

MQ_ERROR_OPERATION_NOT_SUPPORTED_BY_REMOTE_COMPUTER (0xC00E008B)

Returned when an attempt is made to receive or peek at a message using a lookup identifier from a remote queue residing on a computer running MSMQ 1.0 or MSMQ 2.0.

Now, to the best of my knowledge, I'm not trying to receive or peek based on a lookup identifier plus, the MSMQ is running on Windows Server 2003 which means it should be MSMQ 3.0 anyway.

What am I getting wrong here?

Answer 1

You are performing a Remote Transactional Receive. This was introduced in MSMQ 4.0. Upgrade the server to a supported operating system.

How do I get transactional remote receives with MSMQ?