I recently faced a major issue with our payment processing service due to a bug in the retry logic. Instead of the expected 2-3 second delays, the system was retrying every 50 milliseconds for failed transactions. We only discovered this after getting a call from our CFO about the huge weekend bill. It turns out we racked up 847 million operations on Azure Service Bus, costing us about $80k, because our monitoring only tracked successful transactions, and we missed the failure storm entirely. Our budget alerts got lost in spam filters. Has anyone else dealt with similar issues? What strategies do you use to prevent this from happening again?
6 Answers
It's crucial to implement spending limits for your Azure services. These caps can help prevent runaway costs. Not just alerts—automated actions to shut down services could save you from future blowouts. Also, why not tag your resources for better tracking?
You definitely need to fix your alert system. If those budget alerts are getting buried in spam, they aren't useful at all. Also, try using more meaningful alerts so they stand out. Maybe set up a high-priority filter to catch them before they get lost?
Everything is marked high priority these days! It's a tricky balance.
Did anyone get a proper code review on this? It sounds like proper testing wasn’t done, which is crucial in avoiding such costly oversights. Good engineering practices could prevent this in the first place.
You probably should avoid writing your own retry logic. Look into resilience frameworks that can handle this better for you, like the Standard Resilience Handler for .NET. It could save you a lot of headaches in the future.
Best of luck getting a refund! I've had some good experiences raising support tickets for unexpected charges. Just be honest and explain it was a mistake; they often refund a significant portion.
Thanks, I definitely plan to reach out.
Honestly, it's surprising how a simple bug can lead to such huge financial losses. I can't imagine what kind of code could allow that to happen. I guess writing test cases could help catch these issues early on.
Yeah, writing test cases is definitely one way to avoid this kind of mess!
Agreed! Tagging and tracking costs is vital, especially with complex deployments.