BDCS Cluster Verification Checks Raise Intermittent ntpdate "no server suitable for synchronization found" Warnings (Doc ID 2205657.1)

Last updated on NOVEMBER 19, 2016

Applies to:

Big Data Cloud Service - Version 1.0 and later
Linux x86-64

Symptoms

Running the cluster verification tests in the BDCS environment either as part of an upgrade, with "./mammoth -c" or bdacheckcluster can intermittently but consistently raise ntpdate messages/warnings as below. Note, however, the cluster verifications still reported successful.

1. During the cluster verifications ntpdate intermittently raises messaging like below for various ntp servers:

19 Nov 02:54:14 ntpdate[57327]: no server suitable for synchronization found
...
19 Nov 02:54:14 ntpdate[68321]: no server suitable for synchronization found

Full output is like:

19 Nov 02:54:14 ntpdate[57327]: <ntp server1 IP> rate limit response from server.
19 Nov 02:54:14 ntpdate[13621]: <ntp server3 IP> rate limit response from server.
...
19 Nov 02:54:14 ntpdate[52341]: no server suitable for synchronization found
...
19 Nov 02:54:14 ntpdate[57433]: <ntp server2 IP> rate limit response from server.
19 Nov 02:54:14 ntpdate[13104]: <ntp server4 IP> rate limit response from server.
19 Nov 02:54:14 ntpdate[7100]: no server suitable for synchronization found
...
19 Nov 02:54:14 ntpdate[56789]: no server suitable for synchronization found
19 Nov 02:54:14 ntpdate[6788]: <ntp server3 IP> rate limit response from server.
19 Nov 02:54:14 ntpdate[13232]: <ntp server4 IP> rate limit response from server.

3. A warning is raised at the end of the cluster checks for the NTP server which is inaccessible:

WARNING: NTP server is not running on host <ntp server FQDN> when checked from bdcshost1
WARNING: NTP server is not running on host <ntp server FQDN> when checked from bdcshostn

 

Cause

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