Unverified50% confidenceFactExact time
"Exactly-once" is a distributed systems semantic guarantee: even if a message is sent multiple times, the receiver will process it only once.
1
Sources
50%
Confidence
Long-term
Relevance
10/13/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedIdempotency keys are a common means in distributed systems of preventing the same operation from being executed multiple times: the caller carries a globally unique identifier when initiating a request, the server deduplicates on that identifier, and on encountering a duplicate request with the same key it directly returns the first result without re-executing the side effects.62% similarUnverified当系统消息和用户消息规则冲突时,系统消息始终优先61% similarUnverifiedEach event must carry a unique identifier (ID) to ensure idempotency, guaranteeing that an invoice is not issued twice when the same event is sent repeatedly.59% similarUnverifiedA one-time subscription authorization for WeChat subscription messages typically allows only a limited number of messages to be sent; a Mini Program cannot send unlimited reminders after a user agrees once.59% similarUnverified即使消息显示送达,也不代表接收端一定会执行消息中的指令58% similar
Cite This Claim
Stable URI
https://kongchang.com/claim/1016616API
curl https://kongchang.com/api/v1/knowledge/claims/1016616MCP
get_claim(id=1016616)