The clocks of all the nodes in your cluster and the machine that runs the browser through which you access the Ambari Web interface must be able to synchronize with each other.

To install the NTP service and ensure it’s ensure it’s started on boot, run the following commands on each host:

RHEL/CentOS/Oracle 7

  1. yum install -y ntp
  2. systemctl enable ntpd

SLES

  1. zypper install ntp
  2. chkconfig ntp on

Ubuntu

  1. apt-get install ntp
  2. update-rc.d ntp defaults

Debian

  1. apt-get install ntp
  2. update-rc.d ntp defaults