Jackson Databind类路径问题

Question

我有一个弹簧启动应用程序,当我在我的本地使用"mvn clean install"进行部署时工作正常,但是当通过Jenkin生成战争时,它会抛出以下错误.

Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'objectMapper' defined in class path resource [com/test/common/TestRestConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.fasterxml.jackson.databind.ObjectMapper]: Factory method 'objectMapper' threw exception; nested exception is java.lang.NoClassDefFoundError: Could not initialize class com.fasterxml.jackson.databind.SerializationConfig
        at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:599)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1123)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1018)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:510)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482)
        at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
        at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
        at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
        at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1192)
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1116)
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1014)
        at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:545)
        ... 62 common frames omitted
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.fasterxml.jackson.databind.ObjectMapper]: Factory method 'objectMapper' threw exception; nested exception is java.lang.NoClassDefFoundError: Could not initialize class com.fasterxml.jackson.databind.SerializationConfig
        at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:189)
        at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:588)
        ... 74 common frames omitted
Caused by: java.lang.NoClassDefFoundError: Could not initialize class com.fasterxml.jackson.databind.SerializationConfig
        at com.fasterxml.jackson.databind.ObjectMapper.<init>(ObjectMapper.java:535)
        at com.fasterxml.jackson.databind.ObjectMapper.<init>(ObjectMapper.java:452)

我只是尝试使用超比较来比较2个war文件,除了用于编译的JDK次要版本之外我没有看到任何差异.

我试图在我的本地构建和jenkin构建中搜索SerializationConfig.class,

以下命令的输出是,

find . -type f -name '*.jar' -print0 |  xargs -0 -I '{}' sh -c 'jar tf {} | grep SerializationConfig.class &&  echo {}'

当地战争O/P: -

com/fasterxml/jackson/databind/SerializationConfig.class
./jackson-databind-2.7.3.jar
org/codehaus/jackson/map/SerializationConfig.class
./jackson-mapper-asl-1.9.13.jar
com/fasterxml/jackson/databind/SerializationConfig.class
./jersey-all-2.18.jar

詹金战争O/P: -

com/fasterxml/jackson/databind/SerializationConfig.class
./jersey-all-2.18.jar
org/codehaus/jackson/map/SerializationConfig.class
./jackson-mapper-asl-1.9.13.jar
com/fasterxml/jackson/databind/SerializationConfig.class
./jackson-databind-2.7.3.jar

基本上,我在我的TestRestConfiguration类中注入ObjectMapper,如下所示,

@Inject
    private ObjectMapper objectMapper;

不确定,为什么通过Jenkin生成的war文件导致问题.

任何有关这方面的帮助将不胜感激.

Answer 1

您似乎从两个不同的jar文件依赖项中提取相同的类(SerializationConfig).从您的问题来看,很明显com.fasterxml.jackson.databind(在堆栈跟踪中引用)中的那个可以在jackson-databind-2.7.3.jar或者jersey-all-2.18.jar中找到:

com/fasterxml/jackson/databind/SerializationConfig.class
./jackson-databind-2.7.3.jar
org/codehaus/jackson/map/SerializationConfig.class
./jackson-mapper-asl-1.9.13.jar
com/fasterxml/jackson/databind/SerializationConfig.class
./jersey-all-2.18.jar

我首先会尝试削减您的依赖关系,以便依赖jackson-databind-2.7.3.jar或者jersey-all-2.18.jar,但不能同时依赖两者.如果您的应用程序可以与其中一个一起使用,我怀疑这将解决您的问题(尽管我承认我可能希望看到Spring的"没有定义类型的唯一bean ..."消息并且我没有注意到它在你的帖子中).

无论如何,如果我是正确的,那么你所看到的是在本地环境中以不同方式发生的类加载工件与在Jenkins生成的工件中发生并在服务器上部署的内容(此处的额外复杂性 - 您可能需要仔细检查你的服务器是否有任何提供的库,并准确了解你的类加载发生的顺序 - 我知道这并不好玩.

看看Jackson的SerializationConfig类的源代码,我发现以下内容,如果两个不同jar文件中的类实际上不相同,这可能会让事情变得有趣.

private static final long serialVersionUID = 1

希望能帮助到你.祝好运!

编辑1:

设置一对带有一些嵌入式服务器(如Tomcat或Jetty)的所谓"胖罐"文件的构建可能会很有趣.如果您比较本地生成的行为与Jenkins生成的行为,您可能会从中学到一些东西.你看到同样的问题吗？使用胖jar文件,您可以比部署到现有(和预配置,可更改)容器中更明确地控制部署环境.

编辑2:

您可能要做的一些事情有助于找出您的环境差异.

mvn dependency:tree

或者,如果你有很多耐心

mvn -X

Answer 2

您确定Jenkins会清理构建，即它不仅调用“ mvn install” ，而且调用“ mvn clean install”吗？一旦我在本地使用“ mvn全新安装”，该异常消失，该应用程序成功启动。

    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-databind</artifactId>
        <version>2.7.4</version>
    </dependency>

    <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>2.7.4</version>
    </dependency>

    <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-annotations</artifactId>
            <version>2.7.4</version>
    </dependency>