Error starting hibernate JsonMappingException

[giacomo-m]

Hi, i've this error:

org.hibernate.cache.CacheException: java.lang.RuntimeException: com.fasterxml.jackson.databind.JsonMappingException: (was java.lang.NullPointerException) (through reference chain: org.redisson.config.Config["singleServerConfig"]->org.redisson.config.SingleServerConfig["idleConnectionTimeout"])
	at org.hibernate.cache.redis.hibernate52.SingletonRedisRegionFactory.start(SingletonRedisRegionFactory.java:62)
	at org.hibernate.cache.spi.RegionFactory.start(RegionFactory.java:63)
	at org.hibernate.internal.CacheImpl.<init>(CacheImpl.java:71)
	at org.hibernate.engine.spi.CacheInitiator.initiateService(CacheInitiator.java:28)
	at org.hibernate.engine.spi.CacheInitiator.initiateService(CacheInitiator.java:20)
	at org.hibernate.service.internal.SessionFactoryServiceRegistryImpl.initiateService(SessionFactoryServiceRegistryImpl.java:59)
	at org.hibernate.service.internal.AbstractServiceRegistryImpl.createService(AbstractServiceRegistryImpl.java:259)

This is my reddison.yaml:

# redisson configuration for redis servers
# see : https://github.com/mrniko/redisson/wiki/2.-Configuration

singleServerConfig:
  idleConnectionTimeout: 10000
  pingTimeout: 1000
  connectTimeout: 1000
  timeout: 1000
  retryAttempts: 1
  retryInterval: 1000
  reconnectionTimeout: 3000
  failedAttempts: 1
  password: null
  subscriptionsPerConnection: 5
  clientName: null
  address: "redis://127.0.0.1:6379"
  subscriptionConnectionMinimumIdleSize: 1
  subscriptionConnectionPoolSize: 25
  connectionMinimumIdleSize: 5
  connectionPoolSize: 100
  database: 0
  dnsMonitoring: false
  dnsMonitoringInterval: 5000
threads: 0
# Codec
codec: !<org.redisson.codec.SnappyCodec> {}
useLinuxNativeEpoll: false
eventLoopGroup: null

Can you help me?
Regards.
G