Question

使用SpringSource Tool Suite 2.7.1，我在我继承的应用程序（applicationContext.xml，osgi-context.xml和module-context.xml中的几个XML文件的Problems视图中看到此错误项目）：

Error occured processing '/video_service/src/main/webapp/WEB-INF/applicationContext.xml':
java.lang.NoClassDefFoundError: Could not initialize class org.springframework.osgi.service.importer.support.OsgiServiceProxyFactoryBean
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at org.springframework.osgi.config.ReferenceBeanDefinitionParser.class$(ReferenceBeanDefinitionParser.java:68)
at org.springframework.osgi.config.ReferenceBeanDefinitionParser.getBeanClass(ReferenceBeanDefinitionParser.java:68)
at org.springframework.osgi.config.AbstractReferenceDefinitionParser.parseInternal(AbstractReferenceDefinitionParser.java:168)
at org.springframework.beans.factory.xml.AbstractBeanDefinitionParser.parse(AbstractBeanDefinitionParser.java:59)
at org.springframework.beans.factory.xml.NamespaceHandlerSupport.parse(NamespaceHandlerSupport.java:73)
at org.springframework.ide.eclipse.beans.core.internal.model.namespaces.DelegatingNamespaceHandlerResolver$ElementTrackingNamespaceHandler.parse(DelegatingNamespaceHandlerResolver.java:177)
at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1335)
at org.springframework.ide.eclipse.beans.core.internal.model.BeansConfig$ErrorSuppressingBeanDefinitionParserDelegate.parseCustomElement(BeansConfig.java:1293)
at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1325)
at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.parseBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:135)
at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.registerBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:93)
at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.registerBeanDefinitions(XmlBeanDefinitionReader.java:493)
at org.springframework.ide.eclipse.beans.core.internal.model.BeansConfig$2.registerBeanDefinitions(BeansConfig.java:390)
at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:390)
at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:334)
at org.springframework.ide.eclipse.beans.core.internal.model.BeansConfig$2.loadBeanDefinitions(BeansConfig.java:376)
at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:302)
at org.springframework.ide.eclipse.beans.core.internal.model.BeansConfig$3.call(BeansConfig.java:422)
at org.springframework.ide.eclipse.beans.core.internal.model.BeansConfig$3.call(BeansConfig.java:1)
at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

错误出现在

行

<osgi:reference id="facade" interface="ru.focusmedia.odp.pshd.integration.Facade" />

，此界面如下所示：

public interface Facade {

    /**
     * register callback for {@link InputTriggerFact} 
     * @param callback
     */
    void addNotificationListener(InputCallback callback);
    void addNotificationListener(FBCallback callback);
    void addNotificationListener(UserCallback callback);
    void addNotificationListener(RoleCallback callback);

    /**
     * unregister callback for {@link InputTriggerFact}
     * @param callback
     */
    void removeNotificationListener(InputCallback callback);
    void removeNotificationListener(FBCallback callback);
    void removeNotificationListener(UserCallback callback);
    void removeNotificationListener(RoleCallback callback);

    /**
     * getting input by URL
     * @param url
     * @return
     */
    Input getInput(String url);

    /**
     * getting output by URL
     * @param url
     * @return
     */
    Output getOutput(String url);

    /**
     * @param input
     * @return current (last) value for input, may be null
     */
    Measure getCurrentValue(Input input);

    /**
     * request current value from input driver
     * where value is comming, fire InputTriggerFact to InputCallback
     * @param input
     */
    void refreshValue(Input input);

    /**  
     * @param input
     * @param from
     * @param to
     * @param limit
     * @return list of values for input by dates from - to range, may be null
     */
    List<InputTriggerFact> getValues(Input input, Date from, Date to, int limit);

    /**
     * setting value on output
     * @param output
     * @param value
     */
    public void setValue(Output output, Value<? extends Quantity> value);   
}

org.springframework.spring [3.0,3.1)列在MANIFEST.MF的导入库部分中。我已经尝试将org.springframework.osgi.service.importer.support直接添加到导入包中，但这没有帮助。

奇怪的是，这确实不阻止应用程序运行，但我怀疑它可能导致其他问题，所以摆脱这些错误似乎是个好主意。我有什么可以做的吗？

Answer 1

消息“NoClassDefFoundError：无法初始化类XXX”报告类XXX的上一个类加载尝试失败。要诊断这一点，您需要查找先前故障的堆栈跟踪。它应该包含导致原始类初始化失败的问题的嵌套异常。

原始问题发生在XXX或其他类的静态初始化中。 JVM规范说JVM只会尝试为类运行一次类初始化。如果失败，依赖于它的类和类将处于失败状态以防止它们被使用。如果应用程序代码（在本例中为Spring）然后再尝试通过加载它（或其他依赖它的类）来使用失败的类，则会出现此错误。

无法初始化类org.springframework.osgi.service.importer.support.OsgiServiceProxyFactoryBean

1 个答案: