tracker.setDownStoreSessionUID(dbroker.storeSession);
tracker.setLastHeartbeat(dbroker.lastts);
takingoverTargets.add(tracker);
try {
mbus.preTakeover(cb.getBrokerName(), tracker.getDownStoreSessionUID(),
((BrokerMQAddress)cb.getBrokerURL()).getHost().getHostAddress(),
tracker.getBrokerSessionUID());
TakeoverStoreInfo info = cb.takeover(force, tracker);
tracker.setStage_BEFORE_PROCESSING();