1 Answers
A:
When every parent tries to pay school fees at the same time, UPI gateways get slammed response times shoot up, and your POS starts hammering the API with retries. That’s how you end up with timeouts, double debits, and angry parents.
Here’s how to fix that without breaking your fee collection flow:
Start by tracking how long UPI /collect and /status calls are taking.
If the average latency crosses 2.5 seconds for a short period (say, 20–30 seconds), flip your POS into a slow mode or degraded mode.
That means you temporarily stop firing retries at full speed until things calm down.
Instead of instantly retrying failed payments, add smart delays depending on how slow the UPI API is.
This keeps you from overwhelming your PSP when the network’s already congested.
If more than ~25% of transactions are failing or timing out, pause retries for a few minutes.
Show a friendly message on the POS screen instead of spamming failures:
UPI is running slow right now. Please wait a few minutes or try NetBanking.
Parents get clarity, and your system doesn’t melt down.
Don’t fire all retries at once.
Push them into a queue and process them in small batches once UPI response times drop.
For example:
This keeps things smooth even after a PSP slowdown.
When throttling kicks in, send a quick Slack or email alert like:
UPI latency 3.9s, throttling retries for 10 mins.
That way, your finance or ops team knows what’s happening before they start chasing missing payments.
If your PSP offers status webhooks, rely on those instead of constant /status API calls.
It’s faster, cleaner, and you’ll save a ton of retry load
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