WebLogic-Jar存在，但NoClassDefFoundError：org / apache / commons / io / IOUtils

Question

将耳朵（myapp.ear）部署到weblogic 12.1.3时遇到部署错误。 错误：

NoClassDefFoundError：org / apache / commons / io / IOUtils

笔记：

1. 编译良好：mvn clean; mvn安装
2. EAR的APP-INF / lib / commons-io-2.4.jar具有该类
3. 以为可能是罐子冲突。 weblogic有2个带有相同package.class的jar（wlserver / modules / com.bea.core.apache.commons.io_1.2.0.0_1-4.jar和wlserver / modules / features / weblogic.server.merged.jar），但是...那些不在classpath中
4. 再次尝试不向应用程序添加jar（范围=已提供-pom.xml），但存在相同错误

实际错误：

####<Apr 7, 2015 8:12:01 PM EDT> <Error> <netuix> <IBMADM-BL787D> <myserver> <[ACTIVE] ExecuteThread: '8' for queue: 'weblogic.kernel.Default (self-tuning)'> <weblogic> <> <> <1428451921167> <BEA-423147> <Exception [com.bea.portlet.adapter.scopedcontent.ActionLookupFailedException: java.lang.NoClassDefFoundError: org/apache/commons/io/IOUtils] thrown while trying to do task [handlePostbackData] in class [com.bea.netuix.servlets.controls.content.PageFlowContent].> 
####<Apr 7, 2015 8:12:02 PM EDT> <Error> <netuix> <IBMADM-BL787D> <myserver> <[ACTIVE] ExecuteThread: '8' for queue: 'weblogic.kernel.Default (self-tuning)'> <weblogic> <> <> <1428451922415> <BEA-423405> <An exception [java.lang.NoClassDefFoundError: org/apache/commons/io/IOUtils] was thrown while rendering the content at [null].> 
####<Apr 7, 2015 8:12:02 PM EDT> <Error> <netuix> <IBMADM-BL787D> <myserver> <[ACTIVE] ExecuteThread: '8' for queue: 'weblogic.kernel.Default (self-tuning)'> <weblogic> <> <> <1428451922415> <BEA-423137> <There was an error loading the requested URI null.> 
####<Apr 7, 2015 8:12:02 PM EDT> <Error> <netuix> <IBMADM-BL787D> <myserver> <[ACTIVE] ExecuteThread: '8' for queue: 'weblogic.kernel.Default (self-tuning)'> <weblogic> <> <> <1428451922431> <BEA-423223> <There was an error while running a lifecycle stage :: Lifecycle: UIControl.render :: for the control :: null ::.> 
####<Apr 7, 2015 8:12:02 PM EDT> <Error> <netuix> <IBMADM-BL787D> <myserver> <[ACTIVE] ExecuteThread: '8' for queue: 'weblogic.kernel.Default (self-tuning)'> <weblogic> <> <> <1428451922446> <BEA-423405> <An exception [java.lang.NoClassDefFoundError: org/apache/commons/io/IOUtils] was thrown while rendering the content at [/com/bea/console/actions/app/install/Flow.jpf].> 
####<Apr 7, 2015 8:12:02 PM EDT> <Error> <netuix> <IBMADM-BL787D> <myserver> <[ACTIVE] ExecuteThread: '8' for queue: 'weblogic.kernel.Default (self-tuning)'> <weblogic> <> <> <1428451922446> <BEA-423137> <There was an error loading the requested URI /com/bea/console/actions/app/install/Flow.jpf.> 
####<Apr 7, 2015 8:12:02 PM EDT> <Error> <netuix> <IBMADM-BL787D> <myserver> <[ACTIVE] ExecuteThread: '8' for queue: 'weblogic.kernel.Default (self-tuning)'> <weblogic> <> <> <1428451922446> <BEA-423223> <There was an error while running a lifecycle stage :: Lifecycle: UIControl.render :: for the control :: null ::.> 
####<Apr 7, 2015 8:12:02 PM EDT> <Error> <netuix> <IBMADM-BL787D> <myserver> <[ACTIVE] ExecuteThread: '8' for queue: 'weblogic.kernel.Default (self-tuning)'> <weblogic> <> <> <1428451922446> <BEA-423405> <An exception [java.lang.NoClassDefFoundError: org/apache/commons/io/IOUtils] was thrown while rendering the content at [null].> 
####<Apr 7, 2015 8:12:02 PM EDT> <Error> <netuix> <IBMADM-BL787D> <myserver> <[ACTIVE] ExecuteThread: '8' for queue: 'weblogic.kernel.Default (self-tuning)'> <weblogic> <> <> <1428451922446> <BEA-423137> <There was an error loading the requested URI null.> 
####<Apr 7, 2015 8:12:02 PM EDT> <Error> <netuix> <IBMADM-BL787D> <myserver> <[ACTIVE] ExecuteThread: '8' for queue: 'weblogic.kernel.Default (self-tuning)'> <weblogic> <> <> <1428451922446> <BEA-423223> <There was an error while running a lifecycle stage :: Lifecycle: UIControl.render :: for the control :: null ::.> 
####<Apr 7, 2015 8:12:02 PM EDT> <Error> <netuix> <IBMADM-BL787D> <myserver> <[ACTIVE] ExecuteThread: '8' for queue: 'weblogic.kernel.Default (self-tuning)'> <weblogic> <> <> <1428451922477> <BEA-423405> <An exception [java.lang.NoClassDefFoundError: org/apache/commons/io/IOUtils] was thrown while rendering the content at [null].> 
####<Apr 7, 2015 8:12:02 PM EDT> <Error> <netuix> <IBMADM-BL787D> <myserver> <[ACTIVE] ExecuteThread: '8' for queue: 'weblogic.kernel.Default (self-tuning)'> <weblogic> <> <> <1428451922477> <BEA-423137> <There was an error loading the requested URI null.> 
####<Apr 7, 2015 8:12:02 PM EDT> <Error> <netuix> <IBMADM-BL787D> <myserver> <[ACTIVE] ExecuteThread: '8' for queue: 'weblogic.kernel.Default (self-tuning)'> <weblogic> <> <> <1428451922477> <BEA-423223> <There was an error while running a lifecycle stage :: Lifecycle: UIControl.render :: for the control :: null ::.> 

Answer 1

请参阅<prefer-web-inf-classes>和<prefer-application-packages> 。

http://docs.oracle.com/cd/E24329_01/web.1211/e21049/weblogic_xml.htm#WBAPP602

以及类似的问题：

如何在WebLogic中设置jar的顺序？

我会先尝试<prefer-application-packages>解决方案。

但是，NoClassDef意味着实际上找不到该类。 您已经对其进行了编译，但是它不再位于类路径中（因此还要检查您的耳朵的结构）。 请参阅： 什么原因以及NoClassDefFoundError和ClassNotFoundException之间有什么区别？