String backupZNode = ZKUtil.joinZNode( this.watcher.backupMasterAddressesZNode, this.sn.toString()); if (MasterAddressTracker.setMasterAddress(this.watcher, this.watcher.getMasterAddressZNode(), this.sn)) { MasterAddressTracker.setMasterAddress(this.watcher, backupZNode, this.sn);