今天屁颠屁颠装了kudu，到启动Kudu-mater的时候报错了：
[hadoop@hadoop000 init.d]$ sudo ./kudu-master start
Failed to start Kudu Master Server. Return value: 1 [FAILED]
这个时候就应该去扒错误日志，Kudu的默认日志地址在/var/log/kudu里，打开来瞅一眼kudu-master.FATAL
[hadoop@hadoop000 kudu]$ sudo cat kudu-tserver.FATAL
Log file created at: 2020/02/24 14:04:26
Running on machine: hadoop000
Log line format: [IWEF]mmdd hh:mm:ss.uuuuuu threadid file:line] msg
F0224 14:04:26.967012 1301 tablet_server_main.cc:80] Check failed: _s.ok() Bad status: Service unavailable: Cannot initialize clock: Error reading clock. Clock considered unsynchronized
很明显错误描述是这个“Cannot initialize clock: Error reading clock. Clock considered unsynchronized”，谷歌一下表示是时间同步问题，装一下ntp：
sudo yum install ntp启动一下：
service ntpd start看下状态：
[hadoop@hadoop000 kudu]$ service ntpd status
Redirecting to /bin/systemctl status ntpd.service
● ntpd.service - Network Time Service
Loaded: loaded (/usr/lib/systemd/system/ntpd.service; enabled; vendor preset: disabled)
Active: active (running) since Mon 2020-02-24 14:13:45 CST; 3min 38s ago
Process: 2318 ExecStart=/usr/sbin/ntpd -u ntp:ntp $OPTIONS (code=exited, status=0/SUCCESS)
Main PID: 2319 (ntpd)
CGroup: /system.slice/ntpd.service
└─2319 /usr/sbin/ntpd -u ntp:ntp -g
应该是好的，但是回去再启动Kudu的时候还是失败了。
之后发现输入“ntpstat”的时候就会报错：Unable to talk to NTP daemon. Is it running?
然后我查了下，更改了下ntp的配置，配置文件默认在/etc/ntp.conf，在这里加上了自己服务器的地址：server hadoop000 perfer
# Use public servers from the pool.ntp.org project.
# Please consider joining the pool (http://www.pool.ntp.org/join.html).
server hadoop000 perfer
server 0.centos.pool.ntp.org iburst
server 1.centos.pool.ntp.org iburst
server 2.centos.pool.ntp.org iburst
server 3.centos.pool.ntp.org iburst
然后重启ntp：
service ntpd restart这时候再去启动Kudu-master就可以了。不知道是我更改配置的原因还是重启了ntp的原因，可以都试试。
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2.26日更新，又出现了同样的问题，重启ntp即可，应该是重启就可以解决了。
请熟读并背诵service ntpd restart这个玄学命令！
