2

我在使用 Spring Web 应用程序时遇到了一个奇怪的问题。这是来自Tomcat日志：

GRAVE: Exception lors de l'envoi de l'évènement contexte initialisé (context initialized) à l'instance de classe d'écoute (listener) org.springframework.web.context.ContextLoaderListener
org.springframework.beans.factory.BeanDefinitionStoreException: Failed to load bean class: com.jverstry.Configuration.WebConfig; nested exception is java.io.FileNotFoundException: class path resource [java/lang/Object.class] cannot be opened because it does not exist
    at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:267)
    at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:203)
    at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:622)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:451)
    at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:383)
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:283)
    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:111)
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4791)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5285)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.manager.ManagerServlet.start(ManagerServlet.java:1247)
    at org.apache.catalina.manager.HTMLManagerServlet.start(HTMLManagerServlet.java:714)
    at org.apache.catalina.manager.HTMLManagerServlet.doPost(HTMLManagerServlet.java:219)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:641)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at org.apache.catalina.filters.CsrfPreventionFilter.doFilter(CsrfPreventionFilter.java:186)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at org.apache.catalina.filters.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:108)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:225)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:581)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1001)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:585)
    at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:1770)
    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)
Caused by: java.io.FileNotFoundException: class path resource [java/lang/Object.class] cannot be opened because it does not exist
    at org.springframework.core.io.ClassPathResource.getInputStream(ClassPathResource.java:157)
    at org.springframework.core.type.classreading.SimpleMetadataReader.<init>(SimpleMetadataReader.java:49)
    at org.springframework.core.type.classreading.SimpleMetadataReaderFactory.getMetadataReader(SimpleMetadataReaderFactory.java:80)
    at org.springframework.core.type.classreading.CachingMetadataReaderFactory.getMetadataReader(CachingMetadataReaderFactory.java:101)
    at org.springframework.core.type.classreading.SimpleMetadataReaderFactory.getMetadataReader(SimpleMetadataReaderFactory.java:76)
    at org.springframework.context.annotation.ConfigurationClassParser.doProcessConfigurationClass(ConfigurationClassParser.java:257)
    at org.springframework.context.annotation.ConfigurationClassParser.processConfigurationClass(ConfigurationClassParser.java:149)
    at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:126)
    at org.springframework.context.annotation.ConfigurationClassParser.doProcessConfigurationClass(ConfigurationClassParser.java:219)
    at org.springframework.context.annotation.ConfigurationClassParser.processConfigurationClass(ConfigurationClassParser.java:149)
    at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:126)
    at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:263)
    ... 36 more
16-sept.-2012 15:51:56 org.apache.catalina.core.ApplicationContext log
INFO: Closing Spring root WebApplicationContext

我在 SO 上看到过类似的问题，但没有一个与java/lang/Object.class. 我不知道是什么原因造成的。

这是我的web.xml：

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

    <context-param>
        <param-name>contextClass</param-name>
        <param-value>org.springframework.web.context.support.AnnotationConfigWebApplicationContext</param-value>
    </context-param>

    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>com.jverstry.Configuration</param-value>
    </context-param>

    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <filter>
      <filter-name>springSecurityFilterChain</filter-name>
      <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
    </filter>

    <filter-mapping>
      <filter-name>springSecurityFilterChain</filter-name>
      <url-pattern>/*</url-pattern>
    </filter-mapping>

    <servlet>
        <servlet-name>mytest</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value></param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>

    <servlet-mapping>
        <servlet-name>spring</servlet-name>
        <url-pattern>/mytest/*</url-pattern>
    </servlet-mapping>

    <welcome-file-list>
        <welcome-file></welcome-file>
    </welcome-file-list>

</web-app>

这是我的WebConfig课：

@EnableWebMvc
@Configuration
@ComponentScan(basePackages = {"com.jverstry", "org.krams"})
@ImportResource("WEB-INF/spring-security.xml")
public class WebConfig extends WebMvcConfigurerAdapter {

    @Bean
    public ViewResolver getViewResolver() {

        InternalResourceViewResolver resolver
            = new InternalResourceViewResolver();
        resolver.setPrefix("WEB-INF/pages/");
        resolver.setSuffix(".jsp");

        return resolver;

    }

}
4

2 回答 2

1

那是最奇特的。

让我们从我们所知道的开始。该类java.lang.Object和相应的java/lang/Object.class文件肯定确实存在。如果他们不这样做，那么 JVM 一开始就不太可能启动。

那么你怎么会得到例外呢？

我的理论是，在您的代码库（或您正在使用的库）的某个地方，有一个违反规则的类加载器。当要求加载资源时，表现良好的类加载器将首先委托类加载器链，以查看其父类加载器是否可以加载资源。我怀疑正在发生的事情是损坏的类加载器正在跳过委托步骤，只是试图加载资源本身。如果“rt.jar”不在其 JAR 列表等中（通常不会出现），则类加载器将找不到 Object.class 文件……您将获得一个FileNotFoundException.

更新

我想我明白。如果您的 Java 安装损坏到无法加载的程度java.lang.Object，那么 JVM 将无法启动。如果它在损坏之前已经启动，那么它就不会尝试加载Object类。

但它并没有尝试这样做。它实际上是在尝试读取Object.class文件。堆栈跟踪似乎在说这发生在 Spring 的注释处理代码中。

所以我认为在 Java 安装受到破坏后，某些东西触发了 servlet 重启。并且重新启动导致再次完成弹簧配置。为什么它在您重新启动时起作用是一个谜......除非问题是由于硬件错误或重新启动清除的卡住的设备驱动程序造成的。

（您找到的帖子描述了一个不同的场景...... JVM 在其引导期间失败。您的场景更复杂。）

于 2012-09-16T14:25:26.503 回答
0

原来我的 JRE6 安装不知何故损坏了。我手动重新安装了它，现在我没有问题了。我还发现了另一篇文章，可以解释为什么重启后问题会消失。

于 2012-09-27T16:28:26.370 回答