环境信息
虚拟机版本：centos7 、HBase版本1.3.3 、 Hadoop版本：2.6.4 、Zookeeper版本：3.4.5
异常信息
ERROR [main] zookeeper.RecoverableZooKeeper: ZooKeeper exists failed after 4 attempts
WARN [main] zookeeper.ZKUtil: hconnection-0x44b294960x0, quorum=hadoop2:2182, baseZNode=/hbase Unable to set watcher on znode (/hbase/hbaseid)
org.apache.zookeeper.KeeperException$ConnectionLossException: KeeperErrorCode = ConnectionLoss for /hbase/hbaseid
异常处理
Hadoop、Zookeeper均启动成功；HBase启动成功后，查看进程都在；启动 hbase shell ,抛出如上异常
再次查看HBase相关进程，消失；说明Hbase启动失败，查看后台日志，发现如下关键信息：
java.net.ConnectException: Connection refused
zookeeper.RecoverableZooKeeper: ZooKeeper create failed after 4 attempts
Caused by: org.apache.hadoop.hbase.ZooKeeperConnectionException: master:160000x0, quorum=hadoop2:2182, baseZNode=/hbase Unexpected KeeperException creating base node
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