Vertica Analytic Database v7.1.2-0
Today the Vertica database shut down on its own. The final entry in vertica.log is
2016-06-25 05:03:49.446 Init Session:0x7fa56c013360-a00000005913b6 [Txn] <INFO> Begin Txn: a00000005913b6 ' update transaction t set ...'
(The sql update statement is long so I truncated it here for brevity)
How do I diagnose why it shut down?