MQSeries.net :: View topic

MarkusGlagla · Posted: Tue Jan 31, 2006 6:51 am Post subject:

Hi,

I have a problem in opening a queue simultaneously from different threads. I am connected to a queuemanager on a z/os machine, my client is on Windows using the .NET API. Each thread of my client is holding its own queue manager connection (as it is said in the .NET programming documentation under the chapter multithreading). Now in each thread I am trying to make a GET with wait interval on a local queue, the queue is opened using the MQC.MQOO_INPUT_SHARED option. For the first thread doing this, everything is ok. When the next thread ist trying it while the first is still waiting, i get an Exception MQRC_OBJECT_IN_USE(2042).

The only reason for this I could imagine is, that the queues are configured as non-shareable. The documentation says, in this cases (non-shareable queue opened with MQOO_INPUT_SHARED) the queue is opened exclusively (instead of throwing an exception).

I can't check this for myself but the administrations guy says, all queues are marked sharable. But when I check the queue.Shareability Attribute of my queue (after opening it from the first thread), it says 0 (=MQC.MQQA_NOT_SHAREABLE).

Any ideas why this can happen? Are there any other situations or reasons, why my get options are silently ignored?

Any help will be appreciated.