this.zooKeeper = new ZooKeeperWatcher(conf, MASTER + ":" + isa.getPort(), this, true);

baseZNode(根目录)-/hbase
metaServerZNode(元数据服务器地址)-/hbase/meta-region-server
rsZNode-/hbase/rs
drainingZNode-/hbase/draining
masterAddressZNode(HMsater地址)-/hbase/master
backupMasterAddressesZNode(备用HMaster地址)-/hbase/backup-masters
clusterStateZNode(集群状态)-/hbase/running
tableZNode(数据表信息)-/hbase/table
clusterIdZNode(集群ID)-/hbase/hbaseid
splitLogZNode-/hbase/splitWAL
balancerZNode-/hbase/balancer
recoveringRegionsZNode
namespaceZNode(命名空间)-/hbase/namespace
masterMaintZNode

public ClusterStatusTracker(ZooKeeperWatcher watcher, Abortable abortable) {super(watcher, watcher.clusterStateZNode, abortable);}

public ZooKeeperNodeTracker(ZooKeeperWatcher watcher, String node,Abortable abortable) {super(watcher);this.node = node;this.abortable = abortable;this.data = null;}

this.clusterStatusTracker.start();

public synchronized void start() {this.watcher.registerListener(this);try {if(ZKUtil.watchAndCheckExists(watcher, node)) {byte [] data = ZKUtil.getDataAndWatch(watcher, node);if(data != null) {this.data = data;} else {// It existed but now does not, try again to ensure a watch is setLOG.debug("Try starting again because there is no data from " + node);start();}}} catch (KeeperException e) {abortable.abort("Unexpected exception during initialization, aborting", e);}}

this.watcher.registerListener(this);

if(ZKUtil.watchAndCheckExists(watcher, node)) {byte [] data = ZKUtil.getDataAndWatch(watcher, node);if(data != null) {this.data = data;} else {// It existed but now does not, try again to ensure a watch is setLOG.debug("Try starting again because there is no data from " + node);start();}

/*** Method called from ZooKeeper for events and connection status.* <p>* Valid events are passed along to listeners.  Connection status changes* are dealt with locally.*/@Overridepublic void process(WatchedEvent event) {LOG.debug(prefix("Received ZooKeeper Event, " +"type=" + event.getType() + ", " +"state=" + event.getState() + ", " +"path=" + event.getPath()));switch(event.getType()) {// If event type is NONE, this is a connection status changecase None: {connectionEvent(event);break;}// Otherwise pass along to the listenerscase NodeCreated: {for(ZooKeeperListener listener : listeners) {listener.nodeCreated(event.getPath());}break;}case NodeDeleted: {for(ZooKeeperListener listener : listeners) {listener.nodeDeleted(event.getPath());}break;}case NodeDataChanged: {for(ZooKeeperListener listener : listeners) {listener.nodeDataChanged(event.getPath());}break;}case NodeChildrenChanged: {for(ZooKeeperListener listener : listeners) {listener.nodeChildrenChanged(event.getPath());}break;}}}