time gap between machines in ambari cluster

[#1]

hi all

what is the normal gap between machines in ambari cluster in seconds?

for example ( the following example described gap of 20 seconds )

on master01

Fri Jul 5 07:37:23 UTC 2019

but on kafka machine we have

Fri Jul 5 07:37:43 UTC 2019

[#2 · Accepted solution]

@Michael Bronson

Enabling "ntpd" services or "chronyd" are one of the requirement for setting up Ambari Cluster.

https://docs.hortonworks.com/HDPDocuments/Ambari-2.6.2.2/bk_ambari-installation/content/enable_ntp_o...

.

https://github.com/apache/ambari/blob/release-2.6.2/ambari-agent/src/main/python/ambari_agent/HostIn...

[#3]

@Dear jay - yes we have ntp

but we ask what is the max diff that is still normal

as I remember diff between machine should not be more then 5 second - am I right ?

[#4]

@Michael Bronson

There should be ideally no Gap in time. All the cluster nodes should be in exact time sync.
Else there can be many issues like Metrics data (incorrect time), Kerberos ticket issue like well known "Clock skew" error ...etc

https://community.hortonworks.com/content/supportkb/187925/gssexception-failure-unspecified-at-gss-a...