JacksonJsonRedisSerializer in Spring Data Redis 4.0.0 breaks deserialization due to use of unsafeSimpleType

[duyvhh]

In Spring Data Redis 3.5.x, Jackson2JsonRedisSerializer(ObjectMapper, Class<T>) correctly deserializes JSON using:

TypeFactory.defaultInstance().constructType(clazz);

In 4.0.0, the new JacksonJsonRedisSerializer(ObjectMapper, Class<T>) instead uses:

TypeFactory.unsafeSimpleType(clazz);

This produces an incomplete JavaType and causes deserialization to fail for simple DTOs that previously worked.

Suggestion

Replace:

TypeFactory.unsafeSimpleType(clazz)

with:

TypeFactory.defaultInstance().constructType(clazz)

Environment

• Spring Data Redis: 4.0.0
• Jedis: 7.1.0
• Jackson: 3.0.2
• Java: 21
• RedisTemplate with JacksonJsonRedisSerializer

[christophstrobl]

If you'd like us to spend some time investigating, please take the time to provide a complete minimal sample (something that we can unzip or git clone, build, and deploy) that reproduces the problem.

[duyvhh]

I've setup a demo project here

https://github.com/duyvhh/sdr4issue

thanks