samuelstein/help.md

Created March 24, 2026 14:18

Star (0) You must be signed in to star a gist
Fork (0) You must be signed in to fork a gist

Select an option

Learn more about clone URLs
Clone this repository at <script src="https://gist.github.com/samuelstein/7b4bade4796c0862b6d5d8719cf212c4.js"></script>
Save samuelstein/7b4bade4796c0862b6d5d8719cf212c4 to your computer and use it in GitHub Desktop.

Download ZIP

Spring Boot 4 & Jackson 3 & Redis cache

Raw

help.md

Spring Boot 4 & Jackson 3 & Redis cache

Requirement

You use JSON serialization and deserialization for Redis values
You use Java records

Issue

JSON deserialization for cached Redis values always throws exception like:

Caused by: java.lang.ClassCastException: class java.util.LinkedHashMap cannot be cast to class ...

Solution

Use org.springframework.data.redis.serializer.RedisSerializer.json() as value serializer.

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment