Background-Processing on Pi Stack

JobRunr vs ShedLock vs db-scheduler in 2026: How to Run Background Jobs in Java Without Duplicates

Fri, 18 Sep 2026 00:00:00 +0000

You scale your Spring Boot service from one instance to four, and suddenly every @Scheduled method fires four times: four invoices emailed, four reports generated, four webhooks delivered. The instinct is to reach for a distributed lock — but ShedLock, JobRunr, and db-scheduler solve three genuinely different problems, and treating them as interchangeable is why teams end up with duplicated side effects or silently skipped jobs after a restart.

Oban vs Broadway vs Quantum in 2026: Which Elixir Background Processing Layer Should You Use?

Fri, 18 Sep 2026 00:00:00 +0000

Elixir makes concurrency so cheap that teams quietly accumulate Task.start/1 calls all over their codebase — until the first deploy kills 4,000 in-flight jobs mid-execution and nobody can say which emails went out. The BEAM gives you lightweight processes for free, but durability, retries, and back-pressure are not free, and those are exactly the three things that separate Elixir’s background processing libraries.