Interested to Buy Any Domain ? << Click Here >> for more details...
Why do the JMS dbms_aqadm.add_subscriber and dbms_aqadm.remove_subscriber calls sometimes hang when there are concurrent enqueues or dequeues happening on the same queue to which these calls are issued?
- 1 Answers
- 2486 Views
- I also Faced
- E-Mail Answers
Answer / munnu
Add_subscriber and remove_subscriber are administrative operations on a queue. Though AQ does not prevent applications from issuing administrative and operational calls concurrently, they are executed serially. Both add_subscriber and remove_subscriber will block until pending transactions that have enqueued or dequeued messages commit and release the resources they hold. It is expected that adding and removing subscribers will not be a frequent event. It will mostly be part of the setup for the application. The behavior you observe will be acceptable in most cases. The solution is to try to isolate the calls to add_subscriber and remove_subscriber at the setup or cleanup phase when there are no other operations happening on the queue. That will make sure that they will not stay blocked waiting for operational calls to release resources.
| Is This Answer Correct ? | 0 Yes | 0 No |
What does kms mean?
What is jms and how it works?
How kafka is different from jms?
What is the difference between Point to Point and Publish/Subscribe Point-to-point (P2P)
What is jms and activemq?
What is asynchronous messaging in jms?
What is JMS API Architecture?
List types of Messaging services supported by JMS?
In which situations we are using jms? Can we send message from one server to another server using jms?
Where is jms used?
What are the steps to send and receive JMS message ?
What is a stream message?
Core Java 
