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mike_bronson7
mike_bronson7
Gold ⭐️⭐️⭐️
July 5, 2019
Solved

time gap between machines in ambari cluster

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

3 replies

jsensharma
Platinum ⭐️⭐️
jsensharmaAnswer
Platinum ⭐️⭐️
July 5, 2019

@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_on_the_cluster_and_on_the_browser_host.html

.

https://github.com/apache/ambari/blob/release-2.6.2/ambari-agent/src/main/python/ambari_agent/HostInfo.py#L128-L130

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    mike_bronson7
    mike_bronson7Author
    Gold ⭐️⭐️⭐️
    July 5, 2019

    @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 ?

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    Michael-Bronson
    jsensharma
    Platinum ⭐️⭐️
    jsensharma
    Platinum ⭐️⭐️
    July 5, 2019

    @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-api-level.html

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