阿里云对象存储OSS奇葩异常的隐秘原因

阿里云对象存储OSS奇葩异常的隐秘原因

首先，可以正常使用的各组件版本

目前测试正常的各组件详细版本如下：
Spring Cloud：Hoxton.SR5；
Spring Boot：2.2.12.RELEASE；
spring-cloud-alibaba-dependencies：2.2.1.RELEASE；
aliyun-oss-spring-boot-starter：1.1.0；
MyBatis Plus：3.4.1；
JDK：11.0.9；
Nacos：1.4.0。

其次，相关配置文件详细内容

（参考文档：《导入OSS依赖不兼容问题》、《spring-cloud-starter-alicloud-oss 依赖导入失败问题》）

1、l文件：

#  阿里云OSS配置暂时先放在此处(后续会放在Nacos配置中心)：
alibaba:cloud:access-key: L****tsecret-key: x****Zoss:endpoint: oss-cn-beijing.aliyuncsbucket: xxx

2、l文件：

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns=".0.0" xmlns:xsi=""xsi:schemaLocation=".0.0 .0.0.xsd"><modelVersion>4.0.0</modelVersion><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.2.12.RELEASE</version><relativePath/></parent><groupId&xx</groupId><artifactId>xxx-third-party</artifactId><version>0.0.1-SNAPSHOT</version><name>xxx-***</name><description>***服务</description><properties><java.version>11</java.version><spring-cloud.version>Hoxton.SR5</spring-cloud.version></properties><dependencies><dependency><groupId>com.***.****</groupId><artifactId>****-common</artifactId><version>0.0.1-SNAPSHOT</version><exclusions><exclusion><groupId>com.baomidou</groupId><artifactId>mybatis-plus-boot-starter</artifactId></exclusion></exclusions></dependency><!--下面是必须添加的阿里云OSS依赖--><dependency><groupId>com.alibaba.cloud</groupId><artifactId>aliyun-oss-spring-boot-starter</artifactId><!--版本号不能少，否则报错如下：No qualifying bean of type 'com.aliyun.oss.OSS' available: expected at least 1 bean which alifies as autowire candidate. Dependency annotations:{@org.springframework.beans.factory.annotation.Autowired(required=true)}--><version>1.0.0</version><exclusions><!--排除aliyun-java-sdk-oss，因为版本过低    --><exclusion><groupId>com.aliyun</groupId><artifactId>aliyun-java-sdk-oss</artifactId></exclusion><!--排除aliyun-sdk-oss，版本过低，是3.1版本的--><exclusion><groupId>com.aliyun.oss</groupId><artifactId>aliyun-sdk-oss</artifactId></exclusion></exclusions></dependency><!--        导入新的依赖--><dependency><groupId>com.aliyun</groupId><artifactId>aliyun-java-sdk-core</artifactId><version>4.5.7</version></dependency><dependency><groupId>com.aliyun.oss</groupId><artifactId>aliyun-sdk-oss</artifactId><version>3.10.2</version></dependency><dependency><groupId&l.bind</groupId><artifactId>jaxb-api</artifactId><version>2.3.1</version></dependency><dependency><groupId>javax.activation</groupId><artifactId>activation</artifactId><version>1.1.1</version></dependency><!-- no more than 2.3.3--><dependency><groupId>org.glassfish.jaxb</groupId><artifactId>jaxb-runtime</artifactId><version>2.3.3</version></dependency><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-config-server</artifactId><version>2.2.6.RELEASE</version></dependency><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-starter-openfeign</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency><!--(**重点!!!**)不能随便添加下面的aliyun-sdk-oss依赖，否则将报错：java.lang.ClassNotFoundException: com.aliyun.oss.OSS--><!--<dependency><groupId>com.aliyun.oss</groupId><artifactId>aliyun-sdk-oss</artifactId><scope>test</scope></dependency>--></dependencies><dependencyManagement><dependencies><dependency><groupId>org.springframework.cloud</groupId><artifactId>spring-cloud-dependencies</artifactId><version>${spring-cloud.version}</version><type>pom</type><scope>import</scope></dependency><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-alibaba-dependencies</artifactId><version>2.2.1.RELEASE</version><type>pom</type><scope>import</scope></dependency></dependencies></dependencyManagement><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId></plugin></plugins></build><repositories><repository><id>spring-milestones</id><name>Spring Milestones</name><url>;/url></repository></repositories>
</project>

第三、奇葩异常及其隐秘原因

问题的“隐秘原因”在上面的l中已经注释说明，就是添加了下面的依赖：

<dependency><groupId>com.aliyun.oss</groupId><artifactId>aliyun-sdk-oss</artifactId><scope>test</scope>
</dependency>

该依赖应该是使用Maven构建项目时自动添加。
添加该依赖后，启动当前服务的应用程序，会出现一系列莫名其妙的异常。经过多次尝试后，将部分异常收集如下（可能有部分重复或者缺失的）：

java.lang.NoClassDefFoundError: org/junit/jupiter/api/extension/TestInstancePreDestroyCallback
Caused by: java.lang.ClassNotFoundException: org.junit.sion.TestInstancePreDestroyCallbackjava.lang.IllegalStateException: Error processing condition on com.t.oss.OssContextAutoConfiguration.t.annotation.ConditionEvaluator.shouldSkip(ConditionEvaluator.java:108) ~[spring-context-5.2.12.RELEASE.jar:5.2.12.RELEASE]Caused by: java.lang.IllegalStateException: @ConditionalOnMissingBean did not specify a bean using type, name or annotation and the attempt to deduce the bean's type failed at org.springframework.dition.OnBeanCondition$Spec.validatejava.lang.NoClassDefFoundError: com/aliyun/oss/OSS at com.alibaba.alicloud.ApplicationEvent(OssApplicationListener.java:41) ~[spring-cloud-alicloud-oss-2.2.1.RELEASE.jar:2.2.1.RELEASE] 
Caused by: java.lang.ClassNotFoundException: com.aliyun.oss.OSS
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:581) ~[na:na]
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178) ~[na:na]
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521) ~[na:na]
... 16 common frames omittedCaused by: java.lang.IllegalStateException: @ConditionalOnMissingBean did not specify a bean using type, name or annotation and the attempt to deduce the bean's type failed at org.springframework.dition.OnBeanCondition$Spec.validate(OnBeanCondition.java:487) ~[spring-boot-autoconfigure-2.2.12.RELEASE.jar:2.2.12.RELEASE]Caused by: org.springframework.dition.OnBeanCondition$BeanTypeDeductionException: Failed to deduce bean type for com.alibaba.cloud.spring.boot.oss.autoconfigure.OssContextAutoConfiguration.ossClient at org.springframework.dition.OnBeanCondition$Spec.deducedBeanTypeForBeanMethod(OnBeanCondition.java:517) ~[spring-boot-autoconfigure-2.2.12.RELEASE.jar:2.2.12.RELEASE]Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'ossClient' defined in class path resource [com/alibaba/cloud/spring/boot/oss/autoconfigure/OssContextAutoConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.aliyun.oss.OSS]: Factory method 'ossClient' threw exception; nested exception is java.lang.IllegalArgumentException: Oss endpoint can't be empty.Caused by: java.lang.IllegalStateException: @ConditionalOnMissingBean did not specify a bean using type, name or annotation and the attempt to deduce the bean's type failedat org.springframework.dition.OnBeanCondition$Spec.validate(OnBeanCondition.java:487) ~[spring-boot-autoconfigure-2.2.12.RELEASE.jar:2.2.12.RELEASE]at org.springframework.dition.OnBeanCondition$Spec.<init>(OnBeanCondition.java:436) ~[spring-boot-autoconfigure-2.2.12.RELEASE.jar:2.2.12.RELEASE]
java.lang.NoClassDefFoundError: com/aliyun/oss/OSS at com.alibaba.cloud.spring.ApplicationEvent(OssApplicationListener.java:40) ~[aliyun-oss-spring-boot-starter-1.0.0.jar:1.0.0] at 
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'com.***.****.thirdparty.****ThirdPartyApplicationTests': Unsatisfied dependency expressed through field 'ossClient'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.aliyun.oss.OSS' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}

直到将scope为test的依赖aliyun-sdk-oss注释或者删除，上述系列异常才消失无踪。