[caffeine] : Multiple possible bean candidates found when using caffeine with service discovery [DiscoveryClientCacheConfiguration, DefaultCacheConfiguration]

[kirpi4ik]

Expected Behavior

No response

Actual Behaviour

Exception thrown during discovery client initialization

Caused by: io.micronaut.context.exceptions.NonUniqueBeanException: Multiple possible bean candidates found: [DiscoveryClientCacheConfiguration, DefaultCacheConfiguration]
	at io.micronaut.context.DefaultBeanContext.findConcreteCandidate(DefaultBeanContext.java:2428)
	at io.micronaut.context.DefaultApplicationContext.findConcreteCandidate(DefaultApplicationContext.java:606)
	at io.micronaut.context.DefaultBeanContext.lastChanceResolve(DefaultBeanContext.java:3212)
	at io.micronaut.context.DefaultBeanContext.pickOneBean(DefaultBeanContext.java:3156)
	at io.micronaut.context.DefaultBeanContext.findConcreteCandidateNoCache(DefaultBeanContext.java:3112)
	at io.micronaut.context.DefaultBeanContext.findConcreteCandidate(DefaultBeanContext.java:3095)
	at io.micronaut.context.DefaultBeanContext.findBeanDefinition(DefaultBeanContext.java:2745)
	at io.micronaut.context.DefaultBeanContext.resolveBeanRegistration(DefaultBeanContext.java:2720)
	at io.micronaut.context.DefaultBeanContext.getBean(DefaultBeanContext.java:1729)
	at io.micronaut.context.AbstractBeanResolutionContext.getBean(AbstractBeanResolutionContext.java:89)
	at io.micronaut.context.AbstractInitializableBeanDefinition.resolveBean(AbstractInitializableBeanDefinition.java:2165)
	... 91 common frames omitted

From initial investigation
DefaultSyncCache initialization is failing due to this constructor which injects base class CacheConfiguration

    @Inject
    public DefaultSyncCache(
            CacheConfiguration cacheConfiguration,
            ApplicationContext applicationContext,
            ConversionService conversionService) {
        this.cacheConfiguration = cacheConfiguration;
        this.applicationContext = applicationContext;
        this.conversionService = conversionService;
        this.cache = buildCache(cacheConfiguration);
    }

There are two beans which extend this class, one from cache-caffeine[DefaultCacheConfiguration] and one from cashe-core[DiscoveryClientCacheConfiguration]

Steps To Reproduce

With discovery client and caffeine enabled :

implementation("io.micronaut.cache:micronaut-cache-caffeine")
implementation("io.micronaut.discovery:micronaut-discovery-client")

enable discovery cache in application.yaml

micronaut:
  caches:
    discovery-client:
      enabled: true
      maximum-size: 20
      charset: 'UTF-8'
      expire-after-access: 300s

Environment Information

JDK graalvm-jdk-21.0.2+13.1
OS: Win11x64

Example Application

No response

Version

4.2.4

[graemerocher]

multicode has started work on this issue in workspace micronaut-cache-verify.