对于问题标题的含糊不清，我深表歉意，但我什至不确定我要问的问题是什么。我正在尝试在 TomEE 上部署我使用 GWT 构建的示例应用程序，但由于某种原因部署失败。我有一个堆栈跟踪，但那堵文字墙对我来说完全没有意义。我知道注释扫描器是什么，但我不知道为什么 tomee 无法创建注释扫描器或者它与我修复它所必须做的任何事情有什么关系。该应用程序基本上是来自 here 的 StockWatcher .除了将 gwt 输出放在我的 war 的根源上，我什么也没做，然后像这样添加一个 web.xml(我不参与实际客户端服务器通信的部分，所以我只将默认的 servlet 添加到提供静态内容)(在 linux 中运行，使用 oracle jdk 1.7)
<?xml version="1.0" encoding="UTF-8"?>
<web-app 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"
version="2.5">
<servlet>
<servlet-name>default</servlet-name>
<servlet-class>
org.apache.catalina.servlets.DefaultServlet
</servlet-class>
<init-param>
<param-name>debug</param-name>
<param-value>0</param-value>
</init-param>
<init-param>
<param-name>listings</param-name>
<param-value>true</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>default</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
这是 catalina.out 的最后输出
Apr 07, 2014 9:45:39 PM org.apache.catalina.startup.HostConfig deployWAR
INFO: Deploying web application archive /home/hannes/apps/apache-tomee-plus-1.6.0/webapps/web.war
Apr 07, 2014 9:45:39 PM org.apache.tomee.catalina.TomcatWebAppBuilder init
INFO: ------------------------- localhost -> /web
Apr 07, 2014 9:45:39 PM org.apache.openejb.util.JarExtractor extract
INFO: Extracting jar: /home/hannes/apps/apache-tomee-plus-1.6.0/webapps/web.war
Apr 07, 2014 9:45:39 PM org.apache.openejb.util.JarExtractor extract
INFO: Extracted path: /home/hannes/apps/apache-tomee-plus-1.6.0/webapps/web
Apr 07, 2014 9:45:39 PM org.apache.catalina.core.ContainerBase addChildInternal
SEVERE: ContainerBase.addChild: start:
org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/web]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:633)
at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:983)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:548)
at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1468)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:301)
at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819)
at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801)
at org.apache.catalina.manager.ManagerServlet.check(ManagerServlet.java:1447)
at org.apache.catalina.manager.HTMLManagerServlet.upload(HTMLManagerServlet.java:303)
at org.apache.catalina.manager.HTMLManagerServlet.doPost(HTMLManagerServlet.java:210)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
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:213)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
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:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.tomee.catalina.OpenEJBValve.invoke(OpenEJBValve.java:45)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:611)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1041)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:603)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:724)
Caused by: org.apache.tomee.catalina.TomEERuntimeException: org.apache.openejb.OpenEJBException: Unable to create annotation scanner for web module web: null
at org.apache.tomee.catalina.TomcatWebAppBuilder.loadApplication(TomcatWebAppBuilder.java:2049)
at org.apache.tomee.catalina.TomcatWebAppBuilder.startInternal(TomcatWebAppBuilder.java:1091)
at org.apache.tomee.catalina.TomcatWebAppBuilder.configureStart(TomcatWebAppBuilder.java:1051)
at org.apache.tomee.catalina.GlobalListenerSupport.lifecycleEvent(GlobalListenerSupport.java:127)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5322)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
... 44 more
Caused by: org.apache.openejb.OpenEJBException: Unable to create annotation scanner for web module web: null
at org.apache.openejb.config.DeploymentLoader.addWebModule(DeploymentLoader.java:838)
at org.apache.openejb.config.DeploymentLoader.load(DeploymentLoader.java:219)
at org.apache.tomee.catalina.TomcatWebAppBuilder.loadApplication(TomcatWebAppBuilder.java:2047)
... 51 more
Caused by: java.lang.IllegalArgumentException
at org.apache.xbean.asm4.ClassReader.<init>(Unknown Source)
at org.apache.xbean.asm4.ClassReader.<init>(Unknown Source)
at org.apache.xbean.asm4.ClassReader.<init>(Unknown Source)
at org.apache.xbean.finder.AnnotationFinder.readClassDef(AnnotationFinder.java:1120)
at org.apache.xbean.finder.AnnotationFinder.<init>(AnnotationFinder.java:139)
at org.apache.xbean.finder.AnnotationFinder.<init>(AnnotationFinder.java:152)
at org.apache.xbean.finder.AsynchronousInheritanceAnnotationFinder.<init>(AsynchronousInheritanceAnnotationFinder.java:43)
at org.apache.openejb.config.FinderFactory.newFinder(FinderFactory.java:114)
at org.apache.openejb.config.FinderFactory.create(FinderFactory.java:68)
at org.apache.openejb.config.FinderFactory.createFinder(FinderFactory.java:57)
at org.apache.openejb.config.DeploymentLoader.addWebModule(DeploymentLoader.java:830)
... 53 more
Apr 07, 2014 9:45:39 PM org.apache.catalina.startup.HostConfig deployWAR
SEVERE: Error deploying web application archive /home/hannes/apps/apache-tomee-plus-1.6.0/webapps/web.war
java.lang.IllegalStateException: ContainerBase.addChild: start: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/web]]
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:904)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:633)
at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:983)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:548)
at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1468)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:301)
at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819)
at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801)
at org.apache.catalina.manager.ManagerServlet.check(ManagerServlet.java:1447)
at org.apache.catalina.manager.HTMLManagerServlet.upload(HTMLManagerServlet.java:303)
at org.apache.catalina.manager.HTMLManagerServlet.doPost(HTMLManagerServlet.java:210)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
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:213)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
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:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.tomee.catalina.OpenEJBValve.invoke(OpenEJBValve.java:45)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:611)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1041)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:603)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:724)
再次抱歉，这不是一个更具体的问题，但实际上我对此了解不多，无法真正判断出哪里出了问题。
最佳答案
Caused by: java.lang.IllegalArgumentException at org.apache.xbean.asm4.ClassReader.<init>(Unknown Source)
您是否尝试使用 Java 8 编译的类？ AFAICT，ASM4 仅支持 Java 7 字节码(或更旧版本)，而 Java 8 需要 ASM5。
尝试重新编译针对 Java 7 的类。
关于java - TomEE - 无法为 Web 模块 : null 创建注释扫描器，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/22921889/