SpringBoot集成Redis引發的序列化問題

想必你們對SpringBoot可能已經很熟悉了，包括集成Redis這種經常使用的技術，以前一直用一向的寫法去集成Redis，寫配置類沒發現過任何問題，可是上週在給Redis配置類加了一個Bean以後就出現了很難發現的問題。

配置類代碼 `@Configuration public class RedisConfig extends CachingConfigurerSupport {

[@Bean](https://my.oschina.net/bean)
public RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory) {
    RedisTemplate<Object, Object> redisTemplate = new RedisTemplate<>();
    redisTemplate.setConnectionFactory(redisConnectionFactory);

    // 使用Jackson2JsonRedisSerialize 替換默認序列化
    Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);

    ObjectMapper objectMapper = new ObjectMapper();
    objectMapper.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
    objectMapper.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);

    jackson2JsonRedisSerializer.setObjectMapper(objectMapper);

    // 設置value的序列化規則和 key的序列化規則
    redisTemplate.setKeySerializer(new StringRedisSerializer());
    redisTemplate.setValueSerializer(jackson2JsonRedisSerializer);
    redisTemplate.setHashKeySerializer(new StringRedisSerializer());
    redisTemplate.setHashValueSerializer(jackson2JsonRedisSerializer);
    redisTemplate.afterPropertiesSet();
    return redisTemplate;
}


[@Bean](https://my.oschina.net/bean)
public CacheManager cacheManager(RedisConnectionFactory factory) {
    RedisSerializer<String> redisSerializer = new StringRedisSerializer();
    Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);

    //解決查詢緩存轉換異常的問題
    ObjectMapper om = new ObjectMapper();
    om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
    om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
    jackson2JsonRedisSerializer.setObjectMapper(om);

    // 配置序列化（解決亂碼的問題）,過時時間30秒
    RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig()
            .entryTtl(Duration.ofSeconds(1800000))
            .serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(redisSerializer))
            .serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(jackson2JsonRedisSerializer))
            .disableCachingNullValues();

    RedisCacheManager cacheManager = RedisCacheManager.builder(factory)
            .cacheDefaults(config)
            .build();
    return cacheManager;
}

}` 也就是增長了cacheManager()這個方法以後，數據量小的時候是沒有任何問題的，可是一旦放到線上，數據量一上來，那麼整個Redis就致使內存溢出，整個服務都會掛掉。

錯誤日誌： org.springframework.data.redis.serializer.SerializationException: Cannot deserialize; nested exception is org.springframework.core.serializer.support.SerializationFailedException: Failed to deserialize payload. Is the byte array a result of corresponding serialization for DefaultDeserializer?; nested exception is java.lang.OutOfMemoryError: Java heap space at org.springframework.data.redis.serializer.JdkSerializationRedisSerializer.deserialize(JdkSerializationRedisSerializer.java:84) ~[spring-data-redis-2.1.6.RELEASE.jar!/:2.1.6.RELEASE] at org.springframework.session.data.redis.RedisOperationsSessionRepository.onMessage(RedisOperationsSessionRepository.java:538) ~[spring-session-data-redis-2.1.5.RELEASE.jar!/:2.1.5.RELEASE] at org.springframework.data.redis.listener.RedisMessageListenerContainer.executeListener(RedisMessageListenerContainer.java:250) [spring-data-redis-2.1.6.RELEASE.jar!/:2.1.6.RELEASE] at org.springframework.data.redis.listener.RedisMessageListenerContainer.processMessage(RedisMessageListenerContainer.java:240) [spring-data-redis-2.1.6.RELEASE.jar!/:2.1.6.RELEASE] at org.springframework.data.redis.listener.RedisMessageListenerContainer.lambda$dispatchMessage$0(RedisMessageListenerContainer.java:986) [spring-data-redis-2.1.6.RELEASE.jar!/:2.1.6.RELEASE] at java.lang.Thread.run(Thread.java:748) ~[na:1.8.0_191] Caused by: org.springframework.core.serializer.support.SerializationFailedException: Failed to deserialize payload. Is the byte array a result of corresponding serialization for DefaultDeserializer?; nested exception is java.lang.OutOfMemoryError: Java heap space at org.springframework.core.serializer.support.DeserializingConverter.convert(DeserializingConverter.java:78) ~[spring-core-5.1.6.RELEASE.jar!/:5.1.6.RELEASE] at org.springframework.core.serializer.support.DeserializingConverter.convert(DeserializingConverter.java:36) ~[spring-core-5.1.6.RELEASE.jar!/:5.1.6.RELEASE] at org.springframework.data.redis.serializer.JdkSerializationRedisSerializer.deserialize(JdkSerializationRedisSerializer.java:82) ~[spring-data-redis-2.1.6.RELEASE.jar!/:2.1.6.RELEASE] ... 5 common frames omitted Caused by: java.lang.OutOfMemoryError: Java heap space

至於爲何注入這個bean以後會出現這個問題，去了這個bean以後，不會再出現這個問題，目前我還沒找到緣由，分享出來你們一塊兒參考，避免在網上找的配置應用在本身的代碼中出現問題，也歡迎踩過坑的朋友來解答。