You have set a message retention duration of 7 days on your Pub/Sub subscription. However, messages are disappearing after 1 day. What is the most likely cause?

medium📝 Debug Q14 of 15

GCP - Cloud Pub/Sub

AMessages are being acknowledged by the subscriber before 1 day.

BThe retention duration setting is ignored by Pub/Sub.

CThe subscription is a push type and does not support retention.

DMessages are automatically deleted after 24 hours regardless of settings.

Step-by-Step Solution

Solution:

Step 1: Check retention vs acknowledgment
Retention controls how long unacknowledged messages stay. If messages are acknowledged, they are removed immediately.
Step 2: Analyze disappearance cause
If messages disappear early, likely they were acknowledged by the subscriber before 1 day.
Final Answer:
Messages are being acknowledged by the subscriber before 1 day. -> Option A
Quick Check:
Acknowledged messages removed before retention ends [OK]

Quick Trick: Acknowledged messages delete immediately, ignoring retention [OK]

Common Mistakes:

Assuming retention is ignored by Pub/Sub
Believing push subscriptions don't support retention
Thinking messages auto-delete after 24 hours always

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More GCP Quizzes

You have set a message retention duration of 7 days on your Pub/Sub subscription. However, messages are disappearing after 1 day. What is the most likely cause?

Step 1: Check retention vs acknowledgment

Step 2: Analyze disappearance cause

Final Answer:

Quick Check:

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