.net - MSMQ Messages Are Stuck In The Outgoing Queue

Question

Although my question looks similar to some already found on SO, those post did not help me, so here it is:

Given:

• Two machines on the same segment (naturally in the same domain, actually on the same desk)
• Both machines are Windows 7 workstations
• Both machines have disabled firewall
• Both machines see each other (ping works)
• There is a private non transactional message queue test on one of them.
• The sender machine has HKEY_LOCAL_MACHINESOFTWAREMicrosoftMSMQSimpleClient@BinaryEnabled = 'Yes'
• The queue owner sends a message from another machine
• The message is stuck on the outgoing queue, never reaching the target.
• When sent from the same machine (i.e. locally) the message arrives OK.

The message is sent using the following code:

var q = new MessageQueue(@"FormatName:Direct=OS:il-mark-lapprivate$est");
q.Send(string.Format("Test message sent at {0} from {1}", DateTime.Now, Environment.MachineName));

Where il-mark-lap is the address of the machine with the queue.

What on earth do I have to do to make the thing work?

Thanks a lot.

Answer 1

I think I found the answer to this issue, I was having what appears to be the same problem, mine only got stuck after not sending messages to the client for 10 minutes though. Take a look at this KB article, it may help you. Also, in my case it had nothing to do with restarting, so don't let that throw you off, I did exhibit the symptoms in the netstat and messages would initially go through when the client was first started up.

http://support.microsoft.com/kb/2554746