mysql error code 1292

Question

We are running kea DHCP server with MySQL DB and today we encounter following error and after googling everyone saying it could be MySQL bug so wanted to see if it's really a bug or implementation issue.

MariaDB-server-10.2.15-1.el7.centos.x86_64 (3 node galera cluster)

2020-03-07 01:59:16.484 INFO  [kea-dhcp4.leases/29796] DHCP4_LEASE_ALLOC [hwtype=1 00:0c:29:ae:77:cb], cid=[no info], tid=0x80b9c710: lease 10.10.10.22 has been allocated
2020-03-07 02:04:29.625 ERROR [kea-dhcp4.alloc-engine/29796] ALLOC_ENGINE_V4_ALLOC_ERROR [hwtype=1 00:19:85:f0:1c:89], cid=[no info], tid=0xd7790768: error during attempt to allocat
e an IPv4 address: unable to execute for <UPDATE lease4 SET address = ?, hwaddr = ?, client_id = ?, valid_lifetime = ?, expire = ?, subnet_id = ?, fqdn_fwd = ?, fqdn_rev = ?, hostna
me = ?, state = ? WHERE address = ?>, reason: Incorrect datetime value: '2020-03-08 02:04:29' for column 'expire' at row 1 (error code 1292)

Answer 1

This is likely to be a problem with daylight saving time: In the US (and possibly other places) the hour between 02:00am and 03:00am on 8th March 2020 does not exist because the clocks are moved forward one hour at 02:00am to 03:00am.

Answer 2

Use TIMESTAMP instead of DATETIME. That converts your system time into UTC for storing, then converts back when fetching.