Spring Boot 3.2.2 Upgrade Redis - Null key returned for cache operation

[zoroglu]

After the spring 3.2.2 upgrade Redis Cache gives
Null key returned for cache operation

spring-boot version: 3.2.2

<dependency>
  <groupId>redis.clients</groupId>
  <artifactId>jedis</artifactId>
  <version>5.1.0</version>
</dependency>
<dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-data-redis</artifactId>
  <exclusions>
    <exclusion>
      <groupId>io.lettuce</groupId>
        <artifactId>lettuce-core</artifactId>
    </exclusion>
  </exclusions>
</dependency>

Cachable Method:

@Cacheable(value = "user", key = "#username", unless = "#result == null")
public String findUsername(String username) {
    ...
}

but if I use key = "#a0" instead of key = "#username", the problem is solved.

@Cacheable(value = "user", key = "#a0", unless = "#result == null")
public String findUsername(String username) {
    ...
}

There was no need to do it this way in the previous version. My previous versions:
spring-boot version: 2.7.4
redis.clients jedis version :3.9.0

What is the reason?

[mp911de]

Referring to #a0 uses an absent key. Happy to provide further guidance if you provide us with a minimal reproducer along some tests that indicate your expectation vs. what actually happens.

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