RedisTemplate: Failed to deserialize payload

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问题

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.io.EOFException
at org.springframework.data.redis.serializer.JdkSerializationRedisSerializer.deserialize(JdkSerializationRedisSerializer.java:42)
at org.springframework.data.redis.core.AbstractOperations.deserializeValue(AbstractOperations.java:274)

原因分析

在使用org.springframework.data.redis.core.RedisTemplate.boundHashOps的increment方法后，调用其entries方法反序列化时出错。

主要是因为当执行increment方法时，对于入参中的hashVal没有进行序列化，直接调用了redis方法，当获取值时，走了默认的org.springframework.data.redis.serializer.JdkSerializationRedisSerializer,反序列化失败。

解决办法就是将HashValue的序列化方法改为org.springframework.data.redis.serializer.StringRedisSerializer，问题解决！

但是也相应的引入新的问题：所有的HashValue都会受到影响，值都必须为String。所幸Redis底层存储的值都是字符串，所以也无伤大雅。

解决办法

@Configuration
public class LimitRedisConfig {
    @Bean
    public RedisTemplate<Object, Object> limitRedisTemplate(RedisConnectionFactory redisConnectionFactory) {
        RedisTemplate<Object, Object> redisTemplate = new RedisTemplate<>();
        redisTemplate.setHashValueSerializer(new StringRedisSerializer());
        redisTemplate.setConnectionFactory(redisConnectionFactory);
        return redisTemplate;
    }
}