java NoClassDefFoundError: org/springframework/beans/factory/SmartInitializingSingleton
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NoClassDefFoundError: org/springframework/beans/factory/SmartInitializingSingleton
提问by pklndnst
I was recently running into an issue using Spring JMX. The only thing I want to reach is to export a simple Spring Bean for monitoring with JConsole. My goal is to integrate Spring JMX into an existing Spring web application running on an embedded Jetty server. But every time I start the application having JMX configured im running into the following exception:
我最近在使用 Spring JMX 时遇到了一个问题。我唯一想要实现的是导出一个简单的 Spring Bean 以使用 JConsole 进行监控。我的目标是将 Spring JMX 集成到在嵌入式 Jetty 服务器上运行的现有 Spring Web 应用程序中。但是每次我启动配置了 JMX 的应用程序时，都会遇到以下异常：
org.springframework.beans.factory.CannotLoadBeanClassException: Error loading class [org.springframework.jmx.export.MBeanExporter] for bean with name 'exporter' defined in URL [file:/C:/Users/max.mustermann/workspace_intranetportal/my_webapp/target/classes/META-INF/appContext.xml]: problem with class file or dependent class; nested exception is java.lang.NoClassDefFoundError: org/springframework/beans/factory/SmartInitializingSingleton
Google couldn't help me so far.
到目前为止，谷歌帮不了我。
My Spring Bean looks like this:
我的 Spring Bean 看起来像这样：
public class JmxTestBean implements IJmxTestBean {
private String name;
private int age;
private boolean isTest;
@Override
public int add(int x, int y) {
return x + y;
}
@Override
public long myOperation() {
return 10L;
}
@Override
public int getAge() {
return age;
}
@Override
public void setAge(int age) {
this.age = age;
}
@Override
public String getName() {
return name;
}
@Override
public void setName(String name) {
this.name = name;
}
And these are the lines I added to Spring's appContext.xml:
这些是我添加到 Spring 的 appContext.xml 中的几行：
<bean id="exporter" class="org.springframework.jmx.export.MBeanExporter">
<property name="beans">
<map>
<entry key="test:name=testBean" value-ref="testBean" />
</map>
</property>
</bean>
<bean id="testBean" class="com.big.intranet.test.JmxTestBean">
<property name="name" value="TEST" />
<property name="age" value="100" />
</bean>
Deleting the lines I just showed you, the application is running fine. Does anyone have an idea how to solve that problem? Thanks everyone!
删除我刚刚向您展示的行，应用程序运行良好。有谁知道如何解决这个问题？感谢大家！
采纳答案by pklndnst
As I already pointed out in my comment, there're two essential requirements that should be followed when working with Spring JMX:
正如我在评论中已经指出的那样，在使用 Spring JMX 时应遵循两个基本要求：
- As M.Deinumexplained, always make sure that your Spring dependencies share the same version and that - if possible - always the latest version is used.
- Be careful that the bean tag's lazy_initattribute is at least set to false(which should be the default behavior if I remember correctly).
- 正如M.Deinum解释的那样，始终确保您的 Spring 依赖项共享相同的版本，并且 - 如果可能 - 始终使用最新版本。
- 请注意 bean 标记的lazy_init属性至少设置为false（如果我没记错的话，这应该是默认行为）。
Following these rules, everything should work well. Thank you all for participating!
遵循这些规则，一切都应该运行良好。感谢大家的参与！
回答by Anil
I have update from spring 4.0.0.RELEASE to 4.1.5.RELEASE, this solved my problem.
我已经从 spring 4.0.0.RELEASE 更新到 4.1.5.RELEASE，这解决了我的问题。
回答by Abhiram
I had the same issue. I changed the validator dependency from springfox-bean-validators:2.6.1 to hibernate-validator:5.3.4.Final. Then it worked.
我遇到过同样的问题。我将验证器依赖项从 springfox-bean-validators:2.6.1 更改为 hibernate-validator:5.3.4.Final。然后它起作用了。
