Thanks for your reply.
I ever indeed misunderstand how ntpd works, so deployed the shell script on
every node to synchronize time. The reason why the script contains stopping
ntpd command is that the following command 'ntpdate 192.168.0.1' will fail if
miss it.
Now i have understood the difference between ntp and ntpdate, so i discarded
the script, then configured the ntp.conf to synchronize time.
The reason to post the thread is that i wonder why NameNode receive the SIGTERM
signal sent by stopping ntpd command? and why three times all happened at
14:00:00?
