[AMQ-2375] Allow a group preference scheme for failover urls

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Duplicate
• Fix Version/s: 5.6.0
• Component/s: JMS client

Environment

All

• Assignee: Unassigned
• Reporter: Andreas Gies
• Created: 04/Sep/09 09:04
• Updated: 06/Feb/12 20:33
• Resolved: 06/Feb/12 20:33

Description

This enhancement request comes from working with a network of brokers, where each node in itself has a master/slave fault tolerant configuration.

In a 2x2 setup currently you would have a failover url on the client side consisting of 4 single urls (2 masters, 2 slaves). Once a broker dies the JMS client would reconnect
using one of the 4 urls either randomly chosen or in sequence of the url definition.

That might cause the client to reconnect to a broker that belongs to the other master/slave pair. As master/slave is designed to preserve the session state etc, it would be preferable
that the client tries to connect to the new master in its own master/slave group and only if that fails, connect to another broker.

I would imagine a nested scheme of configurations, something like:

failover:(failover:(master1,slave1)?randomize=false,failover:(master2,slave2)?randomize=false)?randomize=true

instead of

failover:(master1,slave1,master2,slave2)