AspectJ LTW + Spring Boot + 内置 Tomcat 非法访问：此 Web 应用程序实例已停止

Question

我正在尝试在我们的Springboot应用程序中添加aspectJ LTW集成。我正在尝试使用 java 方式指定 TomcatInstrumenatbleClassLoader 和 TomcatLoadTimeWeaver 而不是 xml 方式。

参考 Spring 文档 但是当启动我的应用程序时，它会出现如下错误

org.apache.catalina.loader.WebappClassLoaderBase checkStateForResourceLoading
INFO: Illegal access: this web application instance has been stopped already. Could not load [META-INF/spring.factories]. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access.
java.lang.IllegalStateException: Illegal access: this web application instance has been stopped already. Could not load [META-INF/spring.factories]. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access.
    at org.apache.catalina.loader.WebappClassLoaderBase.checkStateForResourceLoading(WebappClassLoaderBase.java:1432)
    at org.apache.catalina.loader.WebappClassLoaderBase.findResources(WebappClassLoaderBase.java:1003)
    at org.apache.catalina.loader.WebappClassLoaderBase.getResources(WebappClassLoaderBase.java:1110)
    at org.springframework.core.io.support.SpringFactoriesLoader.loadSpringFactories(SpringFactoriesLoader.java:143)
    at org.springframework.core.io.support.SpringFactoriesLoader.loadFactoryNames(SpringFactoriesLoader.java:132)
    at org.springframework.boot.SpringApplication.getSpringFactoriesInstances(SpringApplication.java:456)
    at org.springframework.boot.SpringApplication.getSpringFactoriesInstances(SpringApplication.java:450)
    at org.springframework.boot.SpringApplication.getBootstrapRegistryInitializersFromSpringFactories(SpringApplication.java:294)
    at org.springframework.boot.SpringApplication.<init>(SpringApplication.java:285)
    at com.org.pack.app.Application.main(Application.java:37)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:566)
    at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:49)
    at org.springframework.boot.loader.Launcher.launch(Launcher.java:108)
    at org.springframework.boot.loader.Launcher.launch(Launcher.java:58)
    at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:88)

Exception in thread "main" java.lang.reflect.InvocationTargetException
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:566)
    at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:49)
    at org.springframework.boot.loader.Launcher.launch(Launcher.java:108)
    at org.springframework.boot.loader.Launcher.launch(Launcher.java:58)
    at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:88)
Caused by: java.lang.IllegalStateException: Illegal access: this web application instance has been stopped already. Could not load [META-INF/spring.factories]. The following stack trace is thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access.
    at org.apache.catalina.loader.WebappClassLoaderBase.checkStateForResourceLoading(WebappClassLoaderBase.java:1432)
    at org.apache.catalina.loader.WebappClassLoaderBase.findResources(WebappClassLoaderBase.java:1003)
    at org.apache.catalina.loader.WebappClassLoaderBase.getResources(WebappClassLoaderBase.java:1110)
    at org.springframework.core.io.support.SpringFactoriesLoader.loadSpringFactories(SpringFactoriesLoader.java:143)
    at org.springframework.core.io.support.SpringFactoriesLoader.loadFactoryNames(SpringFactoriesLoader.java:132)
    at org.springframework.boot.SpringApplication.getSpringFactoriesInstances(SpringApplication.java:456)
    at org.springframework.boot.SpringApplication.getSpringFactoriesInstances(SpringApplication.java:450)
    at org.springframework.boot.SpringApplication.getBootstrapRegistryInitializersFromSpringFactories(SpringApplication.java:294)
    at org.springframework.boot.SpringApplication.<init>(SpringApplication.java:285)
    at com.org.pack.app.ImportApplication.main(ImportApplication.java:37)

我的代码如下：

@SpringBootApplication
@Configuration
@ComponentScan({<Our Depedencies>})
@EnableBatchProcessing
@EnableLoadTimeWeaving
@EnableCaching
public class Application {
    /**
     * Main method
     * 
     * @param args - arguments
     */
    public static void main(String[] args) {
        DefaultResourceLoader defaultResourceLoader = new DefaultResourceLoader(new TomcatInstrumentableClassLoader());
        SpringApplication application = new SpringApplication(defaultResourceLoader, Application.class);
        application.run(args);
        // SpringApplication.run(Application.class, args);
    }
} 

@Configuration
public class MyConfiguration {

    /**
     * Load Time viewer for tomcat based app
     * 
     * @return - Instance of Intrumentaiton Load TIme Weaver
     */
    @Bean
    public LoadTimeWeaver loadTimeWeaver() {
        return new InstrumentationLoadTimeWeaver();
    }
}


Dependencies (excluding other dependencies): Multi-module project
Parent Pom
```xml
<modelVersion>4.0.0</modelVersion>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>3.1.2</version>
        <relativePath /> <!-- lookup parent from repository -->
    </parent>

项目根POM

          <dependency>
               <groupId>org.apache.tomcat.embed</groupId>
               <artifactId>tomcat-embed-core</artifactId>
               <version>9.0.74</version>
          </dependency>
          <dependency>
                <groupId>org.aspectj</groupId>
                <artifactId>aspectjweaver</artifactId>
                <version>1.9.19</version>
            </dependency>
            <dependency>
                <groupId>org.aspectj</groupId>
                <artifactId>aspectjrt</artifactId>
                <version>1.9.19</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-instrument</artifactId>
                <version>5.3.18</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-instrument-tomcat</artifactId>
                <version>4.3.30.RELEASE</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-beans</artifactId>
                <version>5.3.20</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-core</artifactId>
                <version>5.3.20</version>
            </dependency>

模块的POM

<!-- spring boot -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-batch</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-instrument-tomcat</artifactId>
        </dependency>

文档还说对于 tomcat 6.0 或更高版本不需要设置，但会出现如下错误

org.springframework.beans.factory.BeanCreationException: Error creating bean with name '<our entity factory class>' defined in class path resource [com/org/pack/configuration/MyConfiguration.class]: Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'loadTimeWeaver' defined in org.springframework.context.annotation.LoadTimeWeavingConfiguration: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.instrument.classloading.LoadTimeWeaver]: Factory method 'loadTimeWeaver' threw exception; nested exception is java.lang.IllegalStateException: ClassLoader [org.springframework.boot.loader.LaunchedURLClassLoader] does NOT provide an 'addTransformer(ClassFileTransformer)' method. Specify a custom LoadTimeWeaver or start your Java virtual machine with Spring's agent: -javaagent:spring-instrument-{version}.jar
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:628)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542)
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208)
    at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1154)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:908)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:583)
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:145)
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:754)
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:434)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:338)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1343)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1332)
    at com.org.pack.app.Application.main(Application.java:41)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:566)
    at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:49)
    at org.springframework.boot.loader.Launcher.launch(Launcher.java:108)
    at org.springframework.boot.loader.Launcher.launch(Launcher.java:58)
    at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:88)

Answer 1

只需使用 JVM 参数

-javaagent:/path/to/aspectjweaver-1.9.x.jar

。当从控制台启动 Spring 或 Spring Boot 应用程序时，如果没有命令行上的 Java 代理，我从未设法让它们工作。正如您从错误消息中看到的那样，您的自定义 Weaver bean 并不适用于所有类加载器。

根据自 1.9.8 左右以来 AspectJ 版本的所有发行说明中的提示，您还需要在 JDK 16+ 上的 JVM 命令行上

--add-opens java.base/java.lang=ALL-UNNAMED

。抱歉，这不是 AspectJ 的错。最近的 JDK 根本无法为加载时编织器完成其工作所需的现在受限的 API 提供适当的替代品。