[AMQ-6234] Cannot configure the load balancing count when using Message Groups

• Type: New Feature
• Status: Closed
• Priority: Major
• Resolution: Workaround
• Affects Version/s: 5.10.0
• Component/s: Documentation
• Labels: messagegroups

Environment

Centos 6.7; Oracle Java 1.6.0_30

• Assignee: Unassigned
• Reporter: I McClure
• Created: 08/Apr/16 14:48
• Updated: 11/Apr/16 18:44
• Resolved: 11/Apr/16 18:44

Description

We are seeing ActiveMQ configure the first 10 messages with different JMSXGroupID values to the same consuming node before distributing subsequent messages across the attached consumers.

We need to be able to configure this value down to 1 to allow us to evenly balance the load across the consumers in a round robin fashion.

But we cannot see from the documentation how to configure this property.

For example:
1 AMQ broker with a queue that has 3 attached consumers.
Sending a message with a JMSXGroupID of 'A' goes to consumer 1
The next 9 messages with different JMSXGroupIDs also go to consumer 1
The 11th message with a different JMSXGroupdID goes to consumer 2

This results in an unevenly balanced cluster of consumers when utilising Message Groups.