Redis缓存序列化异常处理

原创

layveen 2021-10-14 11:41:39 博主文章分类：Spring ©著作权

文章标签 序列化 CGLIB 缓存 JSON 文章分类 Redis 数据库

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最近项目里面做了一个基于接口和服务的序列化功能，过程中遇到一个问题，从缓存中获取的缓存JSON字符串，反序列化时报错，原因是className包含$$ENHANCECGLIB字样，具体错误如下：

at java.lang.Thread.run(Thread.java:748)
Caused by: org.springframework.data.redis.serializer.SerializationException:
Could not write JSON: No serializer found for class com.***.common.utils.BeanCopyUtil$MethodInterceptorImpl and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS) 
(through reference chain: com.***.spi.dto.***.CurrentStatusDTO["legCrossNodeList"]->java.util.ArrayList[0]->com.***.spi.dto.common.MapNodeDTO$$EnhancerByCGLIB$$b691461c["CGLIB$CALLBACK_0"]); 
nested exception is com.fasterxml.jackson.databind.exc.InvalidDefinitionException: 
No serializer found for class com.***.common.utils.BeanCopyUtil$MethodInterceptorImpl and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS) 
(through reference chain: com.***.spi.dto.***.CurrentStatusDTO["legCrossNodeList"]->java.util.ArrayList[0]->com.***.spi.dto.common.MapNodeDTO$$EnhancerByCGLIB$$b691461c["CGLIB$CALLBACK_0"])
at org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer.serialize(Jackson2JsonRedisSerializer.java:88)
at org.springframework.data.redis.core.AbstractOperations.rawValue(AbstractOperations.java:127)
at org.springframework.data.redis.core.DefaultValueOperations.set(DefaultValueOperations.java:254)
at com.***.cache.implement.RedisCacher.putValue(RedisCacher.java:211)
at com.***.cache.implement.RedisCacher.loaderAndPutValue(RedisCacher.java:177)
... 110 more
Caused by: com.fasterxml.jackson.databind.exc.InvalidDefinitionException: No serializer found for class com.***.common.utils.BeanCopyUtil$MethodInterceptorImpl and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS) (through reference chain: com.***.spi.dto.***.CurrentStatusDTO["legCrossNodeList"]->java.util.ArrayList[0]->com.***.spi.dto.common.MapNodeDTO$$Enhan

初步怀疑是Redis序列化的问题，检查并调整redisTemplateConfig的配置，无效。

 @Bean
    public RedisTemplate redisTemplate(JedisConnectionFactory connectionFactory) {
        RedisTemplate redisTemplate = new RedisTemplate();
        redisTemplate.setConnectionFactory(connectionFactory);
        
        // 使用Jackson2JsonRedisSerialize 替换默认序列化
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);

        ObjectMapper objectMapper = new ObjectMapper();
        objectMapper.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
        objectMapper.disable(SerializationFeature.FAIL_ON_EMPTY_BEANS);
        objectMapper.configure(DeserializationFeature.FAIL_ON_INVALID_SUBTYPE,false);
        objectMapper.configure(DeserializationFeature.FAIL_ON_MISSING_EXTERNAL_TYPE_ID_PROPERTY,false);
        objectMapper.setDateFormat(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"));
        objectMapper.registerModule(new JavaTimeModule());
        objectMapper.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);
        objectMapper.activateDefaultTyping(LaissezFaireSubTypeValidator.instance,
                ObjectMapper.DefaultTyping.NON_FINAL, JsonTypeInfo.As.PROPERTY);

        jackson2JsonRedisSerializer.setObjectMapper(objectMapper);

        // 设置value的序列化规则和 key的序列化规则
        redisTemplate.setValueSerializer(jackson2JsonRedisSerializer);
        redisTemplate.setHashValueSerializer(jackson2JsonRedisSerializer);
        redisTemplate.setKeySerializer(new StringRedisSerializer());
        redisTemplate.setHashKeySerializer(redisTemplate.getKeySerializer());
//        redisTemplate.setEnableTransactionSupport(true);
        redisTemplate.afterPropertiesSet();

        return redisTemplate;
    }

跟踪接口发现缓存之前对象就已经出现问题，推测试mybatis返回的问题，再跟，发现mybatis查询后即时返回的数据是正常的，原来是代码里面自己写的BeanCopy的问题。打开工具类，看了实现：

public static <T> T beanCopy(Object source, Class<T> clazz) {
        T target = newCglibInstance(clazz);
        beanCopy(source, target);
        return target;
    }

public static Object newCglibInstance(Class clazz) {
        try {
            Enhancer enhancer = new Enhancer();
            enhancer.setSuperclass(clazz);
            enhancer.setCallback(new BeanCopyUtil.MethodInterceptorImpl());
            return enhancer.create();
        } catch (Throwable var2) {
            log.warn("Can't newInstance class {}", clazz.getSimpleName());
            throw new Error(var2.getMessage());
        }
    }

找到原因之后，改造起来就容易多了，直接用spring自带的copy实现即可。

  public static <T> T copyBean(Object source, Class<T> clazz) {
        T target = BeanUtils.instantiateClass(clazz);
        BeanUtils.copyProperties(source, target);
        return target;
    }

at java.lang.Thread.run(Thread.java:748)
Caused by: org.springframework.data.redis.serializer.SerializationException:
Could not write JSON: No serializer found for class com.***.common.utils.BeanCopyUtil$MethodInterceptorImpl and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS) 
(through reference chain: com.***.spi.dto.***.CurrentStatusDTO["legCrossNodeList"]->java.util.ArrayList[0]->com.***.spi.dto.common.MapNodeDTO$$EnhancerByCGLIB$$b691461c["CGLIB$CALLBACK_0"]); 
nested exception is com.fasterxml.jackson.databind.exc.InvalidDefinitionException: 
No serializer found for class com.***.common.utils.BeanCopyUtil$MethodInterceptorImpl and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS) 
(through reference chain: com.***.spi.dto.***.CurrentStatusDTO["legCrossNodeList"]->java.util.ArrayList[0]->com.***.spi.dto.common.MapNodeDTO$$EnhancerByCGLIB$$b691461c["CGLIB$CALLBACK_0"])
at org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer.serialize(Jackson2JsonRedisSerializer.java:88)
at org.springframework.data.redis.core.AbstractOperations.rawValue(AbstractOperations.java:127)
at org.springframework.data.redis.core.DefaultValueOperations.set(DefaultValueOperations.java:254)
at com.***.cache.implement.RedisCacher.putValue(RedisCacher.java:211)
at com.***.cache.implement.RedisCacher.loaderAndPutValue(RedisCacher.java:177)
... 110 more
Caused by: com.fasterxml.jackson.databind.exc.InvalidDefinitionException: 
No serializer found for class com.***.common.utils.BeanCopyUtil$MethodInterceptorImpl and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS) (through reference chain: com.***.spi.dto.***.CurrentStatusDTO["legCrossNodeList"]->java.util.ArrayList[0]->com.***.spi.dto.common.MapNodeDTO$$Enhan