On 06/24/2011 10:21 PM, Kerry Bonin wrote:
We are experiences some issues with failover (reports that not all clients are failing over on primary broker failure), and would like to know if there is any way from the client library API to know when a failover occurs and to which broker the failover has occurred?
No, I'm afraid there is not at present.
On a related note, is there any way to tell the client to return to earlier brokers once they come back online?
No there is not.
Otherwise its possible to have clients spread across brokers. This may be fine when federation and/or clustering is on, but IIRC that still isn't an option for Windows users...
Without some broker-to-broker communication, you could only detect that the earlier broker was back online by periodically trying to connect from the client process. Once you found it was, you would need to abort the connection established to the backup and use the earlier broker (the c++ API doesn't have a way of doing that,at present, it just has close()).
I'd suggest in this use case it may be simpler to turn automatic reconnect off and handle reconnection yourself. There may be ways in which we could enhance the API to make this simpler and I'd be keen to hear suggestion on that.
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