Spring Cloud Gateway Retry

In this tutorial, you'll learn about Fix Spring Cloud Gateway Retry Not Working. We cover key concepts, practical examples, and best practices.

The Problem

Failed requests are not retried despite retry filter configuration.

Quick Fix

Add Retry filter

Wrong:

# No Retry filter

Output:

No retry on failure

Right:

spring.cloud.gateway.routes[0].filters[0].name=Retry
filters[0].args.retries=3

Output:

Retry configured with 3 attempts

Specify retryable statuses

Wrong:

# Default statuses only

Output:

Only retries 503

Right:

filters[0].args.statuses=SERVICE_UNAVAILABLE,GATEWAY_TIMEOUT

Output:

Retries on 503 and 504

Set backoff

Wrong:

# No backoff

Output:

Retries immediate

Right:

filters[0].args.backoff.firstBackoff=500ms
filters[0].args.backoff.maxBackoff=10s
filters[0].args.backoff.factor=2

Output:

Exponential backoff configured

Prevention

• Add the Retry filter to the route
• Specify retryable HTTP statuses
• Configure backoff for retry timing

Common Mistakes with cloud gateway retry

1. Using head and tail instead of pattern matching, causing runtime errors on empty lists
2. Forgetting that lazy evaluation defers computation until the value is forced, causing space leaks with unevaluated thunks
3. Using return to exit a function early instead of wrapping a pure value in the monad

These mistakes appear frequently in real-world SPRING code. DodaTech's contributors have identified these patterns through analysis of open-source projects and production systems.

Practice Exercise

Write a pure function that safely divides two integers using Maybe, then test it with edge cases like division by zero and negative numbers.

This exercise reinforces the concepts covered in this guide. Try implementing it before checking online solutions.

FAQ

This quick fix is part of the DodaTech Spring & JVM ecosystem series. Built by the developers of Doda Browser, DodaZIP, and Durga Antivirus Pro.