双击 zkServer.cmd，发现dos框一闪而过，无法正确启动zookeeper。
右键编辑 zkServer.cmd
@echo off
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REM this work for additional information regarding copyright ownership.
REM The ASF licenses this file to You under the Apache License, Version 2.0
REM (the "License"); you may not use this file except in compliance with
REM the License. You may obtain a copy of the License at
REM
REM http://www.apache.org/licenses/LICENSE-2.0
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REM See the License for the specific language governing permissions and
REM limitations under the License.
setlocal
call "%~dp0zkEnv.cmd"
set ZOOMAIN=org.apache.zookeeper.server.quorum.QuorumPeerMain
echo on
java "-Dzookeeper.log.dir=%ZOO_LOG_DIR%" "-Dzookeeper.root.logger=%ZOO_LOG4J_PROP%" -cp "%CLASSPATH%" %ZOOMAIN% "%ZOOCFG%" %*
endlocal
pause
在末尾输入pause ，保存退出
。
再次运行zkServer.cmd，发现dos命令行窗口静止了。发现如下错误信息：
2017-01-09 18:59:39,529 ERROR org.apache.zookeeper.server.quorum.QuorumPeer: Unable to load database on disk
java.io.IOException: Failed to process transaction type: 1 error: KeeperErrorCode = NoNode for /cloudera_manager_zookeeper_canary
at org.apache.zookeeper.server.persistence.FileTxnSnapLog.restore(FileTxnSnapLog.java:188)
at org.apache.zookeeper.server.ZKDatabase.loadDataBase(ZKDatabase.java:223)
at org.apache.zookeeper.server.quorum.QuorumPeer.loadDataBase(QuorumPeer.java:417)
at org.apache.zookeeper.server.quorum.QuorumPeer.start(QuorumPeer.java:409)
at org.apache.zookeeper.server.quorum.QuorumPeerMain.runFromConfig(QuorumPeerMain.java:156)
at org.apache.zookeeper.server.quorum.QuorumPeerMain.initializeAndRun(QuorumPeerMain.java:116)
at org.apache.zookeeper.server.quorum.QuorumPeerMain.main(QuorumPeerMain.java:79)
Caused by: org.apache.zookeeper.KeeperException$NoNodeException: KeeperErrorCode = NoNode for /cloudera_manager_zookeeper_canary
at org.apache.zookeeper.server.persistence.FileTxnSnapLog.processTransaction(FileTxnSnapLog.java:250)
at org.apache.zookeeper.server.persistence.FileTxnSnapLog.restore(FileTxnSnapLog.java:186)
解决办法：
删除zookeeper 配置的数据目录文件夹
# The number of milliseconds of each tick
tickTime=2000
# The number of ticks that the initial
# synchronization phase can take
initLimit=10
# The number of ticks that can pass between
# sending a request and getting an acknowledgement
syncLimit=5
# the directory where the snapshot is stored.
# do not use /tmp for storage, /tmp here is just
# example sakes.
dataDir=/tmp/zookeeper
# the port at which the clients will connect
clientPort=2181
#
# Be sure to read the maintenance section of the
# administrator guide before turning on autopurge.
#
# http://zookeeper.apache.org/doc/current/zookeeperAdmin.html#sc_maintenance
#
# The number of snapshots to retain in dataDir
#autopurge.snapRetainCount=3
# Purge task interval in hours
# Set to "0" to disable auto purge feature
#autopurge.purgeInterval=1
初始化数据目录
重启
