Relocated broker loses all durable subscriptions

Hi,

ActiveMQ 5.8.0 on RHEL 6.1.

We recently moved an existing broker to a new server. It was really a logic
move; the old broker was shutdown completely and a new one installed from
scratch on another server without copying any files from the old broker.
Essentially the new broker was the same as the old broker but with a
different IP address.

The new broker uses the existing message store mounted over NFS.

However, after the new broker came up all the durable topic subscriptions
that should have appeared in the web console were gone.

Is it conceivable that changing a broker's IP address could cause it to not
recognize its durable subscriptions when restarted? Is this a bug or a
limitation?

Presumably the new broker must have erased them as they did not reappear
when the new broker was shutdown and the old one restarted.

Thanks,
Paul