Java Bean Bag

 Hey devs 👋, A few years back (around 3–4 years ago), I got a chance to work on a project involving Spring Cron Scheduler — using both XML configuration and Java annotations . The requirement was pretty standard: ✅ Trigger a job every day at a particular time ✅ Fetch data from a table maintained by another team ✅ Process that data further Everything worked well at first — in lower environments and even after initial production deployment . But then... something strange started happening 😬 🚨 The Weird Behavior After 4-5 days in production, the scheduled method started behaving oddly: ❌ It triggered twice at the same time ❌ Then later, three times , then four ... 😵 Restarting the application fixed it — but only temporarily . After a few more days, it would go back to calling multiple times again. It was as if my @Scheduled method had cloned itself and started a party! 🥴 ⏳ Take 10 Seconds... Can You Guess the Root Cause? You probably thought of: Duplica...