[Solved] What is the expected behavior if a push subscription's endpoint returns a non-2xx HTTP status code? — Ans: The message is retried until a successful response is received. | GCP

GCP - Cloud Pub/Sub

What is the expected behavior if a push subscription's endpoint returns a non-2xx HTTP status code?

AThe message is retried until a successful response is received.

BThe message is considered acknowledged and removed.

CThe message is discarded immediately.

DThe message is sent to a dead-letter topic instantly.

Step-by-Step Solution

Solution:

Step 1: Understand push subscription retry behavior
If the endpoint returns a non-2xx status, Pub/Sub retries delivery until success or expiration.
Step 2: Check other options
Messages are not acknowledged or discarded on failure; dead-lettering requires explicit config.
Final Answer:
The message is retried until a successful response is received. -> Option A
Quick Check:
Push retry on failure = True [OK]

Quick Trick: Push retries on non-2xx responses [OK]

Common Mistakes:

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What is the expected behavior if a push subscription's endpoint returns a non-2xx HTTP status code?