CODEWITHSUNDEEP
google-cloud-pubsubdead-letter
Arvind Sharma
Arvind Sharma

Reputation: 101

Why PubSub subscription publish a message to dead letter topic after retention period expires

I have a requirement to track the undelivered messages in PubSub. But when a subscriber to a PubSub Pull subscription is unavailable after the retention period the message will be lost forever from the subscription. It is not been captured by the dead letter topic created for the subscription.

It seems the PubSub only sends a message to a dead letter topic if the number of retries exceeds and the acknowledgement not been received by the subscriber.

Is there a way to push a message to dead letter topic before the message get lost for forever?

Upvotes: 0

Views: 1317

Answers (1)

Kamal Aboul-Hosn
Kamal Aboul-Hosn

Reputation: 17161

There is no way to send messages to a dead letter topic before the message is deleted due to the retention period expiring, no. The goal of the dead letter topic is to capture messages that are causing issues for subscribers and potentially preventing the processing of other messages, e.g., if the subscribers are crashing due to an unexpected message. The way this state is detected is via the retry count.

Upvotes: 1

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