What does "spike_detect" ntp messages mean?

Solution Verified - Updated -

Issue

  • What does "spike_detect" ntp messages mean?
  • Are the NTP servers failing? Is there any problem with the NTP client?
2014-04-10T12:05:08.000+12:00 hostname ntpd[2425]: 0.0.0.0 c515 05 clock_sync
2014-04-10T12:09:29.000+12:00 hostname ntpd[2425]: 0.0.0.0 0613 03 spike_detect -0.368888 s
2014-04-10T12:31:22.000+12:00 hostname ntpd[2425]: 0.0.0.0 061c 0c clock_step -0.371011 s

Environment

  • Red Hat Enterprise Linux (RHEL) 6
  • ntp

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