The US Naval Observatory announced that a leap second will be added to official timekeeping on December 31st, 2016. The extra second will be added at 23:59:59 UTC and be denoted as 23:59:60.
The Data Repository will not restart after you stopped the database through Vertica Admintools
CAPM 2.XOS LinuxDB Vertica
A leap second occurred on 30 June 2015. The extra second causes Vertica to fail to start on certain versions of the Linux operating system.
To resolve this issue, restart each node before the first time you start the database.
This issue is fixed in the following Linux Kernel versions:
RHEL 6.1 EUS kernel-2.6.32-131.30.2 or later
RHEL 6.2 EUS kernel-2.6.32-220.25.1.el6 or later
RHEL 6.3 kernel-2.6.32-279.5.2 or later
RHEL 6.4 and later already contain a fix for this issue.