R.I.P.
Cron job that ran twice at DST
–
“Died twice in one night. Twice as dead.”
Death certificate
- Status
- 🪦 Buried
- Cause of death
- TimezoneWorked perfectly, except at midnight UTC, during daylight saving, or for anyone else on Earth.
- Severity
- Critical
- Hours to kill
- 11 hours
- Killed by
- Jashanpreet
- Language
- Java
- Born
- 27 Oct 2024
- Fix merged
- 4 Nov 2024
- Buried
- 13 Nov 2024
- Component
- scheduler
- Symptoms
- When the clocks fell back an hour, the nightly job ran twice at 01:30 and every customer got two invoices.
- The fix
- Scheduled the job in UTC and made it safe to run twice.
Timeline
Every life of this bug, oldest first.
Born as “Cron job that ran twice at DST”27 Oct 2024
Fix merged4 Nov 2024
Buried13 Nov 2024