启动 Jetty 服务器时扫描条目“模块信息.class”时出错

2022-09-01 19:16:42

我最近在启动Java服务器时看到了这一点。有没有人看到这个?如果是这样,修复方法是什么?我可以确认jar和模块信息.class存在于相关路径中。

 MultiException[java.lang.RuntimeException: Error scanning entry module-info.class from jar
 file:jetty/9.2.4.v20141103/tempDirectory/webapp/WEB-INF/lib/slf4j-api-1.8.0-alpha2.jar, java.lang.RuntimeException: Error scanning entry module-info.class from jar
 file:jetty/9.2.4.v20141103/tempDirectory/webapp/WEB-INF/lib/log4j-over-slf4j-1.8.0-alpha2.jar, java.lang.RuntimeException: Error scanning entry module-info.class from jar
 file:jetty/9.2.4.v20141103/tempDirectory/webapp/WEB-INF/lib/jcl-over-slf4j-1.8.0-alpha2.jar] at
 org.eclipse.jetty.annotations.AnnotationConfiguration.scanForAnnotations(AnnotationConfiguration.java:535) at
 org.eclipse.jetty.annotations.AnnotationConfiguration.configure(AnnotationConfiguration.java:446) at
 org.eclipse.jetty.webapp.WebAppContext.configure(WebAppContext.java:473) at
 org.eclipse.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1331) at
 org.eclipse.jetty.server.handler.ContextHandler.doStart(ContextHandler.java:741) at
 org.eclipse.jetty.webapp.WebAppContext.doStart(WebAppContext.java:499) at
 org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68) at
 org.eclipse.jetty.deploy.bindings.StandardStarter.processBinding(StandardStarter.java:41) at
 org.eclipse.jetty.deploy.AppLifeCycle.runBindings(AppLifeCycle.java:186) at
 org.eclipse.jetty.deploy.DeploymentManager.requestAppGoal(DeploymentManager.java:498) at
 org.eclipse.jetty.deploy.DeploymentManager.addApp(DeploymentManager.java:146) at
 org.eclipse.jetty.deploy.providers.ScanningAppProvider.fileAdded(ScanningAppProvider.java:180) at
 org.eclipse.jetty.deploy.providers.ScanningAppProvider$1.fileAdded(ScanningAppProvider.java:64) at 
 org.eclipse.jetty.util.Scanner.reportAddition(Scanner.java:609) at 
 org.eclipse.jetty.util.Scanner.reportDifferences(Scanner.java:528) at
 org.eclipse.jetty.util.Scanner.scan(Scanner.java:391) at
 org.eclipse.jetty.util.Scanner.doStart(Scanner.java:313) at
 org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68) at
 org.eclipse.jetty.deploy.providers.ScanningAppProvider.doStart(ScanningAppProvider.java:150) at
 org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68) at
 org.eclipse.jetty.deploy.DeploymentManager.startAppProvider(DeploymentManager.java:560) at
 org.eclipse.jetty.deploy.DeploymentManager.doStart(DeploymentManager.java:235) at
 org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68) at
 org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:132) at 
 org.eclipse.jetty.server.Server.start(Server.java:387) at
 org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:114) at
 org.eclipse.jetty.server.handler.AbstractHandler.doStart(AbstractHandler.java:61) at 
 org.eclipse.jetty.server.Server.doStart(Server.java:354) at
 org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68) at
 org.eclipse.jetty.xml.XmlConfiguration$1.run(XmlConfiguration.java:1255) at 
 java.security.AccessController.doPrivileged(Native Method)     at
 org.eclipse.jetty.xml.XmlConfiguration.main(XmlConfiguration.java:1174) at 
 sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at
 sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at
 sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at
 java.lang.reflect.Method.invoke(Method.java:483) at
 org.eclipse.jetty.start.Main.invokeMain(Main.java:323) at
 org.eclipse.jetty.start.Main.start(Main.java:820) at
 org.eclipse.jetty.start.Main.main(Main.java:112)

答案 1

module-info.class是一个 Java9 (JPMS) 特性。

Jetty 9.4.9(或更高版本)支持从Java 9更改新的JAR文件。

无论您使用什么运行时JVM(Oracle Java 8,甚至像OpenJDK 11.0.3),如果您在WebApp(或服务器类加载器)中使用那些JEP-238多版本Jar文件,那么您需要将Jetty版本升级到Jetty 9.4.x。

这是因为 Servlet 3.x 引入了字节码扫描要求。Jetty 需要扫描所有 JAR 文件,以查找可能@HandlesTypes定义的 webapp 匹配 servlet 注释或引用。一旦JEP-238成为现实,这个字节码扫描层必须进行调整/更新/修复,以支持这些新的JAR文件结构。Jetty 9.4.9 是第一个在字节码扫描期间支持这些新 JAR 文件结构的 Jetty 版本。

关于 Java 9 功能的问题:


答案 2

推荐