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Last modification
- Rev 36371 2026-04-24 12:10:46
- Author: amit
- Log message:
- HDFC webhook: INSERT IGNORE on hdfc_payment to fix concurrent-duplicate 500 storm
Replaces persist() with a native INSERT IGNORE so concurrent same-UTR webhook
retries serialize on the unique-index check, and the loser gets a 0-row no-op
(warning, not exception). Outer @Transactional session stays clean, Spring
commits normally, HDFC sees 200 on both the winner (Success) and the loser
(Duplicate) - retry amplification ends.
Flow:
persist(hdfcPayment) -> insertIgnore(hdfcPayment) + selectByUtrNo(utr)
- inserted == 1: proceed with wallet / sidbi side-effects using fetched id
- inserted == 0: respond Duplicate, skip side-effects (owned by winning tx)
- defensive: log warn if insertIgnore returned 0 but selectByUtrNo finds
no row (could mean IGNORE swallowed a non-duplicate issue like truncation)
Also drops HdfcProcessingHelper (r36366) which used REQUIRES_NEW for the same
goal; that approach required a second JDBC connection and is no longer needed
with SQL-level idempotency.
Does NOT touch the wallet-side lost-update hole (user_wallet read-modify-write
without FOR UPDATE). That is a separate commit.