What is the purpose of a Dead-Letter Queue (DLQ)?

Problem Statement

Explanation

After max retries or non-retryable errors, messages move to a DLQ. Operators can inspect payloads, fix data or code, and replay safely. DLQs prevent poison messages from blocking partitions indefinitely.

Code Solution

SolutionRead Only

onFail>k: if attempts>=k → publish(msg) to DLQ

Practice Sets

This question appears in the following practice sets:

Messaging & Event-Driven Architecture

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What is the purpose of a Dead-Letter Queue (DLQ)?

Problem Statement

Explanation

Code Solution

Practice Sets

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Master Interviews Anywhere, Anytime

What is the purpose of a Dead-Letter Queue (DLQ)?

Problem Statement

Explanation

Code Solution

Practice Sets

Related Questions

Which statement best describes the Single Responsibility Principle?

Open–Closed Principle encourages what practice when adding features?

High-Level Design (HLD) typically focuses on which artifacts?

Which UML diagram best captures interactions over time between components?

Which pairing describes a healthy design goal?

More from System Design

Master Interviews
Anywhere, Anytime