想必大家对SpringBoot可能已经很熟悉了,包括集成Redis这种常用的技术,之前一直用一贯的写法去集成Redis,写配置类没发现过任何问题,但是上周在给Redis配置类加了一个Bean之后就出现了很难发现的问题。
配置类代码 `@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 替换默认序列化
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);
// 设置value的序列化规则和 key的序列化规则
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);
//解决查询缓存转换异常的问题
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(解决乱码的问题),过期时间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;
}
}` 也就是增加了cacheManager()这个方法之后,数据量小的时候是没有任何问题的,但是一旦放到线上,数据量一上来,那么整个Redis就导致内存溢出,整个服务都会挂掉。
错误日志: 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
至于为什么注入这个bean之后会出现这个问题,去了这个bean之后,不会再出现这个问题,目前我还没找到原因,分享出来大家一起参考,避免在网上找的配置应用在自己的代码中出现问题,也欢迎踩过坑的朋友来解答。