"all cross-region subscriptions succeeded",
"at least one cross-region subscription failed");
final Callback<Void> mcb = CallbackUtils.multiCallback(clients.size(), postCb, ctx);
for (final HedwigHubClient client : clients) {
final HedwigSubscriber sub = client.getSubscriber();
sub.asyncSubscribe(topic, mySubId, CreateOrAttach.CREATE_OR_ATTACH, new Callback<Void>() {
@Override
public void operationFinished(Object ctx, Void resultOfOperation) {
if (LOGGER.isDebugEnabled())
LOGGER.debug("cross-region subscription done for topic " + topic.toStringUtf8());
try {