for cache debug test

最新推荐文章于 2024-06-23 00:02:37 发布
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本文进行了一系列的缓存调试测试，详细记录了测试过程中的关键步骤和发现的问题。

for cache debug test

for cache debug test

for cache debug test


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Java开发 - SpringCache初体验
CodingFire的博客
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听名字，我们就知道，SpringCache是Spring大家族的一员，所以Spring很好的兼容了SpringCache，它实现了基于注解的缓存功能，只需要简单地加一个注解，就能实现缓存功能，大大简化我们在业务中操作缓存的代码，比如redisTemplate，这些东西就可以省略了。Spring Cache提供了一层抽象，底层可以切换不同的cache实现。具体就是通过接口来统一不同的缓存技术。简介使用EhCache作为缓存技术使用Google的GuavaCache作为缓存技术。
cache失效与硬件处理
weixin_49342084的博客
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缓存失效（Cache Miss）发生在处理器需要访问的数据不在缓存中时。这会导致处理器必须从主内存中检索数据，这是一个比从缓存读取数据慢得多的操作。如果没有找到（缓存失效，Cache Miss），则会触发一个读取内存的操作。这通常涉及到多级缓存（L1, L2, L3等等），处理器会先在速度最快的L1缓存中查找。从内存读取的数据会以缓存行的形式（通常是64字节或更大的块）写入缓存。如果发生缓存失效，处理器会向内存控制器发出请求，内存控制器则从主内存中读取包含所需数据的缓存行。这通常是一个相对耗时的过程。
【异常解决】缓存报错：Null key returned for cache operation (maybe you are using named params on classes withou
No8g攻城狮的博客
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注解中key的值即id值为null，即该方法的入参 id 为空，在调用方法时，不能传null值，传入 null 值的话就会报上述错误。项目中有一个方法：根据设备id查询设备详情，它是一个非常高频使用的函数。为了减轻对数据库的压力，自然而然的就想到了使用缓存的技术。在调用该方法的时候先判断id是否为空，id不为空时再调用该方法即可。
Null key returned for cache operation
afuckbug的博客
07-22 9321
想要缓存到redis中的数据存不上，一直报这个错误。 先发报错内容： Null key returned for cache operation (maybe you are using named params on classes without debug info?) caches=[value] | key='#xxx' | keyGenerator='' | cacheManager='' | cacheResolver='' | condition='' | unless='' | sync=
Null key returned for cache operation (maybe you are using named params on classes without debug inf
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Builder（解决Null key returned for cache operation）解决: key = "#id" 改成: key = "'_' + #id"
Null key returned for cache operation(maybe you are using named params on classes without debug info
weixin_44652014的博客
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ehcache：Null key returned for cache operation错误 这个错误一般都是某个key为null值导致 @Caching( cacheable = { @Cacheable(value = “emp”,key = “#lastName”) }, put = { @CachePut(value = “emp”,key = “#result.id”), @CachePut(value = "emp",key = "#result.email"
github-npm-registry-test-debug：这里没什么可看到的\\（ツ）_
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标题 "github-npm-registry-test-debug：这里没什么可看到的\\（ツ）_/¯" 提示我们这可能是一个关于在GitHub上进行npm registry测试和调试的项目。在JavaScript开发中，npm（Node Package Manager）是广泛使用的包...
slub_debug不能调查kmem_cache_cpu被踩坏但貌似又能修复该问题的原因
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slub_debug不能调查kmem_cache_cpu被踩坏但貌似又能修复该问题的原因 我们知道slub_debug是一个调查slub/slab踩内存十分有效的工具。但最近遇到一个问题，在走slub快速路径c->freelist分配object的时候发现freelist地址出错，导致内核挂死。通过对slub分配流程的理解，可以想象到是之前一个page中的object内容被踩（use after free），然后又当做好的一个page添加到了kmem_cache_cpu中，然后再一次申请object的
Updates: 1 Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@373ebf74] true 09:59:03.102 [main] DEBUG org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate - Retrieved ApplicationContext [1629911510] from cache with key [[MergedContextConfiguration@467aecef testClass = TestBalance, locations = '{classpath:applicationContext.xml}', classes = '{}', contextInitializerClasses = '[]', activeProfiles = '{}', propertySourceLocations = '{}', propertySourceProperties = '{}', contextCustomizers = set[[empty]], contextLoader = 'org.springframework.test.context.support.DelegatingSmartContextLoader', parent = [null]]] 09:59:03.102 [main] DEBUG org.springframework.test.context.cache - Spring test ApplicationContext cache statistics: [DefaultContextCache@4d6025c5 size = 1, maxSize = 32, parentContextCount = 0, hitCount = 10, missCount = 1] 09:59:03.102 [main] DEBUG org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate - Retrieved ApplicationContext [1629911510] from cache with key [[MergedContextConfiguration@467aecef testClass = TestBalance, locations = '{classpath:applicationContext.xml}', classes = '{}', contextInitializerClasses = '[]', activeProfiles = '{}', propertySourceLocations = '{}', propertySourceProperties = '{}', contextCustomizers = set[[empty]], contextLoader = 'org.springframework.test.context.support.DelegatingSmartContextLoader', parent = [null]]] 09:59:03.102 [main] DEBUG org.springframework.test.context.cache - Spring test ApplicationContext cache statistics: [DefaultContextCache@4d6025c5 size = 1, maxSize = 32, parentContextCount = 0, hitCount = 11, missCount = 1] 09:59:03.102 [main] DEBUG org.springframework.test.context.support.AbstractDirtiesContextTestExecutionListener - After test method: context [DefaultTestContext@3dfc5fb8 testClass = TestBalance, testInstance = cs.test.TestBalance@75cd8043, testMethod = testUpdate@TestBalance, testException = [null], mergedContextConfiguration = [MergedContextConfiguration@467aecef testClass = TestBalance, locations = '{classpath:applicationContext.xml}', classes = '{}', contextInitializerClasses = '[]', activeProfiles = '{}', propertySourceLocations = '{}', propertySourceProperties = '{}', contextCustomizers = set[[empty]], contextLoader = 'org.springframework.test.context.support.DelegatingSmartContextLoader', parent = [null]], attributes = map[[empty]]], class annotated with @DirtiesContext [false] with mode [null], method annotated with @DirtiesContext [false] with mode [null]. 09:59:03.102 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved @ProfileValueSourceConfiguration [null] for test class [cs.test.TestBalance] 09:59:03.103 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved ProfileValueSource type [class org.springframework.test.annotation.SystemProfileValueSource] for class [cs.test.TestBalance] 09:59:03.103 [main] DEBUG org.springframework.test.context.support.DependencyInjectionTestExecutionListener - Performing dependency injection for test context [[DefaultTestContext@3dfc5fb8 testClass = TestBalance, testInstance = cs.test.TestBalance@362045c0, testMethod = [null], testException = [null], mergedContextConfiguration = [MergedContextConfiguration@467aecef testClass = TestBalance, locations = '{classpath:applicationContext.xml}', classes = '{}', contextInitializerClasses = '[]', activeProfiles = '{}', propertySourceLocations = '{}', propertySourceProperties = '{}', contextCustomizers = set[[empty]], contextLoader = 'org.springframework.test.context.support.DelegatingSmartContextLoader', parent = [null]], attributes = map[[empty]]]]. 09:59:03.103 [main] DEBUG org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate - Retrieved ApplicationContext [1629911510] from cache with key [[MergedContextConfiguration@467aecef testClass = TestBalance, locations = '{classpath:applicationContext.xml}', classes = '{}', contextInitializerClasses = '[]', activeProfiles = '{}', propertySourceLocations = '{}', propertySourceProperties = '{}', contextCustomizers = set[[empty]], contextLoader = 'org.springframework.test.context.support.DelegatingSmartContextLoader', parent = [null]]] 09:59:03.103 [main] DEBUG org.springframework.test.context.cache - Spring test ApplicationContext cache statistics: [DefaultContextCache@4d6025c5 size = 1, maxSize = 32, parentContextCount = 0, hitCount = 12, missCount = 1] 09:59:03.103 [main] DEBUG org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate - Retrieved ApplicationContext [1629911510] from cache with key [[MergedContextConfiguration@467aecef testClass = TestBalance, locations = '{classpath:applicationContext.xml}', classes = '{}', contextInitializerClasses = '[]', activeProfiles = '{}', propertySourceLocations = '{}', propertySourceProperties = '{}', contextCustomizers = set[[empty]], contextLoader = 'org.springframework.test.context.support.DelegatingSmartContextLoader', parent = [null]]] 09:59:03.103 [main] DEBUG org.springframework.test.context.cache - Spring test ApplicationContext cache statistics: [DefaultContextCache@4d6025c5 size = 1, maxSize = 32, parentContextCount = 0, hitCount = 13, missCount = 1] 09:59:03.103 [main] DEBUG org.springframework.test.context.support.AbstractDirtiesContextTestExecutionListener - Before test method: context [DefaultTestContext@3dfc5fb8 testClass = TestBalance, testInstance = cs.test.TestBalance@362045c0, testMethod = testGetBalanceById@TestBalance, testException = [null], mergedContextConfiguration = [MergedContextConfiguration@467aecef testClass = TestBalance, locations = '{classpath:applicationContext.xml}', classes = '{}', contextInitializerClasses = '[]', activeProfiles = '{}', propertySourceLocations = '{}', propertySourceProperties = '{}', contextCustomizers = set[[empty]], contextLoader = 'org.springframework.test.context.support.DelegatingSmartContextLoader', parent = [null]], attributes = map[[empty]]], class annotated with @DirtiesContext [false] with mode [null], method annotated with @DirtiesContext [false] with mode [null]. 09:59:03.103 [main] DEBUG org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate - Retrieved ApplicationContext [1629911510] from cache with key [[MergedContextConfiguration@467aecef testClass = TestBalance, locations = '{classpath:applicationContext.xml}', classes = '{}', contextInitializerClasses = '[]', activeProfiles = '{}', propertySourceLocations = '{}', propertySourceProperties = '{}', contextCustomizers = set[[empty]], contextLoader = 'org.springframework.test.context.support.DelegatingSmartContextLoader', parent = [null]]] 09:59:03.103 [main] DEBUG org.springframework.test.context.cache - Spring test ApplicationContext cache statistics: [DefaultContextCache@4d6025c5 size = 1, maxSize = 32, parentContextCount = 0, hitCount = 14, missCount = 1] 09:59:03.103 [main] DEBUG org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate - Retrieved ApplicationContext [1629911510] from cache with key [[MergedContextConfiguration@467aecef testClass = TestBalance, locations = '{classpath:applicationContext.xml}', classes = '{}', contextInitializerClasses = '[]', activeProfiles = '{}', propertySourceLocations = '{}', propertySourceProperties = '{}', contextCustomizers = set[[empty]], contextLoader = 'org.springframework.test.context.support.DelegatingSmartContextLoader', parent = [null]]] 09:59:03.104 [main] DEBUG org.springframework.test.context.cache - Spring test ApplicationContext cache statistics: [DefaultContextCache@4d6025c5 size = 1, maxSize = 32, parentContextCount = 0, hitCount = 15, missCount = 1] Creating a new SqlSession SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@5ccbeb64] was not registered for synchronization because synchronization is not active 09:59:03.104 [main] DEBUG org.springframework.jdbc.datasource.DataSourceUtils - Fetching JDBC Connection from DataSource JDBC Connection [1495608502, URL=jdbc:mysql://localhost:3306/cs_data?useSSL=false&serverTimezone=Asia/Shanghai&allowPublicKeyRetrieval=true, UserName=root@localhost, MySQL Connector/J] will not be managed by Spring ==> Preparing: SELECT uid,u_money FROM usr_balance WHERE uid=? ==> Parameters: 001(String) <== Columns: uid, u_money <== Row: 001, 100.0 <== Total: 1 Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@5ccbeb64] Balance(uid=001, money=100.0) 09:59:03.105 [main] DEBUG org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate - Retrieved ApplicationContext [1629911510] from cache with key [[MergedContextConfiguration@467aecef testClass = TestBalance, locations = '{classpath:applicationContext.xml}', classes = '{}', contextInitializerClasses = '[]', activeProfiles = '{}', propertySourceLocations = '{}', propertySourceProperties = '{}', contextCustomizers = set[[empty]], contextLoader = 'org.springframework.test.context.support.DelegatingSmartContextLoader', parent = [null]]] 09:59:03.105 [main] DEBUG org.springframework.test.context.cache - Spring test ApplicationContext cache statistics: [DefaultContextCache@4d6025c5 size = 1, maxSize = 32, parentContextCount = 0, hitCount = 16, missCount = 1] 09:59:03.105 [main] DEBUG org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate - Retrieved ApplicationContext [1629911510] from cache with key [[MergedContextConfiguration@467aecef testClass = TestBalance, locations = '{classpath:applicationContext.xml}', classes = '{}', contextInitializerClasses = '[]', activeProfiles = '{}', propertySourceLocations = '{}', propertySourceProperties = '{}', contextCustomizers = set[[empty]], contextLoader = 'org.springframework.test.context.support.DelegatingSmartContextLoader', parent = [null]]] 09:59:03.105 [main] DEBUG org.springframework.test.context.cache - Spring test ApplicationContext cache statistics: [DefaultContextCache@4d6025c5 size = 1, maxSize = 32, parentContextCount = 0, hitCount = 17, missCount = 1] 09:59:03.107 [main] DEBUG org.springframework.test.context.support.AbstractDirtiesContextTestExecutionListener - After test method: context [DefaultTestContext@3dfc5fb8 testClass = TestBalance, testInstance = cs.test.TestBalance@362045c0, testMethod = testGetBalanceById@TestBalance, testException = [null], mergedContextConfiguration = [MergedContextConfiguration@467aecef testClass = TestBalance, locations = '{classpath:applicationContext.xml}', classes = '{}', contextInitializerClasses = '[]', activeProfiles = '{}', propertySourceLocations = '{}', propertySourceProperties = '{}', contextCustomizers = set[[empty]], contextLoader = 'org.springframework.test.context.support.DelegatingSmartContextLoader', parent = [null]], attributes = map[[empty]]], class annotated with @DirtiesContext [false] with mode [null], method annotated with @DirtiesContext [false] with mode [null]. 09:59:03.107 [main] DEBUG org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate - Retrieved ApplicationContext [1629911510] from cache with key [[MergedContextConfiguration@467aecef testClass = TestBalance, locations = '{classpath:applicationContext.xml}', classes = '{}', contextInitializerClasses = '[]', activeProfiles = '{}', propertySourceLocations = '{}', propertySourceProperties = '{}', contextCustomizers = set[[empty]], contextLoader = 'org.springframework.test.context.support.DelegatingSmartContextLoader', parent = [null]]] 09:59:03.107 [main] DEBUG org.springframework.test.context.cache - Spring test ApplicationContext cache statistics: [DefaultContextCache@4d6025c5 size = 1, maxSize = 32, parentContextCount = 0, hitCount = 18, missCount = 1] 09:59:03.108 [main] DEBUG org.springframework.test.context.support.AbstractDirtiesContextTestExecutionListener - After test class: context [DefaultTestContext@3dfc5fb8 testClass = TestBalance, testInstance = [null], testMethod = [null], testException = [null], mergedContextConfiguration = [MergedContextConfiguration@467aecef testClass = TestBalance, locations = '{classpath:applicationContext.xml}', classes = '{}', contextInitializerClasses = '[]', activeProfiles = '{}', propertySourceLocations = '{}', propertySourceProperties = '{}', contextCustomizers = set[[empty]], contextLoader = 'org.springframework.test.context.support.DelegatingSmartContextLoader', parent = [null]], attributes = map[[empty]]], class annotated with @DirtiesContext [false] with mode [null]. 09:59:03.108 [SpringContextShutdownHook] DEBUG org.springframework.context.support.GenericApplicationContext - Closing org.springframework.context.support.GenericApplicationContext@612679d6, started on Tue Sep 30 09:59:02 CST 2025 Process finished with exit code 0
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springboot+redis+springcache测试项目，数据库连接使用mybatis，数据库使用mysql，test文件夹下为自动生成javaBean方法
Spring Cache常见问题解决
m0_63624484的博客
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而你把Cacheable注解方法Server层方法上，那么该方法返回的肯定是一个xxx实体类，这就会导致，你存入的数据是一个Result类，而你需要取的数据又变成了xxx实体类，从而导致报错。那么问题就出现了 ， 我们传入的新增的参数肯定是不会带有主键id的，那么此时他根据id去查找key，而你的id是null，他就会报这个错误。你只需要记住，springCache的注解，他的存入和取出的数据的类型一定是根据你的方法的返回值来的。这个问题一定是因为你存入数据的注解和取出数据的注解放在不一样的层的方法上。
记一次解决Null key returned for cache operation的过程
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记一次解决Null key returned for cache operation的过程~
@Cacheable Null key returned for cache异常的解决方法
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@Override @Cacheable(cacheManager = "redis1DayCacheManager", cacheNames = "panda:user:reserve", key = "#userId", unless = "#result == null") public boolean hasReserve(Integer userId) { ... } 网上有些说把参数改成p0或a0，我试了都不行； 最后在注解里加了个条件condition，成功 @Override @
【RuoYi-VUE】缓存错误：Null key returned for cache operation (maybe you are using named params on classes
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