GCP - Cloud Pub/Sub
Why does Google Cloud Pub/Sub require the publisher to explicitly acknowledge publish failures when using message ordering?
Why does Google Cloud Pub/Sub require the publisher to explicitly acknowledge publish failures when using message ordering?
hard📝 Conceptual Q10 of 15
Step-by-Step Solution
Solution:
Step 1: Understand failure impact on ordering
Publish failures can cause disorder if not handled properly.Step 2: Recognize blocking mechanism
Pub/Sub blocks further messages with the same ordering key until failure is acknowledged to keep order.Final Answer:
To prevent message reordering by blocking subsequent messages with the same ordering key until failure is resolved -> Option DQuick Check:
Failure ack blocks next messages to keep order [OK]
Quick Trick: Ack failures to keep ordering intact [OK]
Common Mistakes:
- Assuming automatic retries unblock messages
- Thinking ordering disables on failure
- Believing out-of-order delivery speeds processing
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