缺少依赖项会导致 servlet 在 Struts 1.x 中无法初始化吗？
Would missing dependency cause servlet fails to initialize in Struts 1.x?
java.lang.NoClassDefFoundError: org/apache/commons/chain/config/ConfigParser
我在 Weblogic 9 上部署了一个 Struts 1.x Web 应用程序。请参阅此特定错误行，构建路径中似乎缺少 commons-chain-x.x.jar。我尝试了几个不同版本的 commons-chain.jar (1.1 & 1.2) 但没有帮助。我也用谷歌搜索了几个小时，找不到任何解决方案。这里的实际问题是什么？缺少 .jar 是否真的导致 servlet 正确初始化？
p.s. 我知道...Struts 早已过时且不再广泛使用，但出于某些原因我不得不这样做。如有任何帮助，我们将不胜感激。
图书馆：
完整错误日志：
Nov 9, 2018 4:00:25 PM org.apache.struts.action.ActionServlet init
SEVERE: Unable to initialize Struts ActionServlet due to an unexpected exception or error thrown, so marking the servlet as unavailable. Most likely, this is due to an incorrect or missing library dependency.
java.lang.NoClassDefFoundError: org/apache/commons/chain/config/ConfigParser
at org.apache.struts.action.ActionServlet.initChain(ActionServlet.java:1680)
at org.apache.struts.action.ActionServlet.init(ActionServlet.java:350)
at javax.servlet.GenericServlet.init(GenericServlet.java:256)
at weblogic.servlet.internal.StubSecurityHelper$ServletInitAction.run(StubSecurityHelper.java:278)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121)
at weblogic.servlet.internal.StubSecurityHelper.createServlet(StubSecurityHelper.java:64)
at weblogic.servlet.internal.StubLifecycleHelper.createOneInstance(StubLifecycleHelper.java:58)
at weblogic.servlet.internal.StubLifecycleHelper.<init>(StubLifecycleHelper.java:48)
at weblogic.servlet.internal.ServletStubImpl.prepareServlet(ServletStubImpl.java:507)
at weblogic.servlet.internal.WebAppServletContext.preloadServlet(WebAppServletContext.java:1723)
at weblogic.servlet.internal.WebAppServletContext.loadServletsOnStartup(WebAppServletContext.java:1700)
at weblogic.servlet.internal.WebAppServletContext.preloadResources(WebAppServletContext.java:1620)
at weblogic.servlet.internal.WebAppServletContext.start(WebAppServletContext.java:2761)
at weblogic.servlet.internal.WebAppModule.startContexts(WebAppModule.java:889)
at weblogic.servlet.internal.WebAppModule.start(WebAppModule.java:333)
at weblogic.application.internal.flow.ModuleStateDriver.next(ModuleStateDriver.java:204)
at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:26)
at weblogic.application.internal.flow.ModuleStateDriver.start(ModuleStateDriver.java:60)
at weblogic.application.internal.flow.ScopedModuleDriver.start(ScopedModuleDriver.java:200)
at weblogic.application.internal.flow.ModuleListenerInvoker.start(ModuleListenerInvoker.java:117)
at weblogic.application.internal.flow.ModuleStateDriver.next(ModuleStateDriver.java:204)
at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:26)
at weblogic.application.internal.flow.ModuleStateDriver.start(ModuleStateDriver.java:60)
at weblogic.application.internal.flow.StartModulesFlow.activate(StartModulesFlow.java:26)
at weblogic.application.internal.BaseDeployment.next(BaseDeployment.java:635)
at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:26)
at weblogic.application.internal.BaseDeployment.activate(BaseDeployment.java:212)
at weblogic.application.internal.DeploymentStateChecker.activate(DeploymentStateChecker.java:154)
at weblogic.deploy.internal.targetserver.AppContainerInvoker.activate(AppContainerInvoker.java:80)
at weblogic.deploy.internal.targetserver.operations.AbstractOperation.activate(AbstractOperation.java:566)
at weblogic.deploy.internal.targetserver.operations.ActivateOperation.activateDeployment(ActivateOperation.java:136)
at weblogic.deploy.internal.targetserver.operations.ActivateOperation.doCommit(ActivateOperation.java:104)
at weblogic.deploy.internal.targetserver.operations.AbstractOperation.commit(AbstractOperation.java:320)
at weblogic.deploy.internal.targetserver.DeploymentManager.handleDeploymentCommit(DeploymentManager.java:815)
at weblogic.deploy.internal.targetserver.DeploymentManager.activateDeploymentList(DeploymentManager.java:1222)
at weblogic.deploy.internal.targetserver.DeploymentManager.handleCommit(DeploymentManager.java:433)
at weblogic.deploy.internal.targetserver.DeploymentServiceDispatcher.commit(DeploymentServiceDispatcher.java:161)
at weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer.doCommitCallback(DeploymentReceiverCallbackDeliverer.java:181)
at weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer.access0(DeploymentReceiverCallbackDeliverer.java:12)
at weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer.run(DeploymentReceiverCallbackDeliverer.java:67)
at weblogic.work.ServerWorkManagerImpl$WorkAdapterImpl.run(ServerWorkManagerImpl.java:518)
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:209)
at weblogic.work.ExecuteThread.run(ExecuteThread.java:181)
<Nov 9, 2018 4:00:25 PM SGT> <Error> <HTTP> <BEA-101216> <Servlet: "action" failed to preload on startup in Web application: "StrutsExample".
javax.servlet.UnavailableException: org/apache/commons/chain/config/ConfigParser
at org.apache.struts.action.ActionServlet.init(ActionServlet.java:402)
at javax.servlet.GenericServlet.init(GenericServlet.java:256)
at weblogic.servlet.internal.StubSecurityHelper$ServletInitAction.run(StubSecurityHelper.java:278)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121)
Truncated. see log file for complete stacktrace
>
参考此 article，清除 WebLogic 服务器缓存会有所帮助。所以它根据我的问题在这里做了。我只是删除了 tmp 文件夹，错误现在消失了。
Weblogic Cache exists in $MW_HOME/user_projects/domains/ccg/servers/AdminServer/tmp
I had named my domain ccg. You can replace that with your domain name in the above path.
p.s。上述路径下的文件夹 tmp、cache 和 logs 可以安全删除。
java.lang.NoClassDefFoundError: org/apache/commons/chain/config/ConfigParser
我在 Weblogic 9 上部署了一个 Struts 1.x Web 应用程序。请参阅此特定错误行，构建路径中似乎缺少 commons-chain-x.x.jar。我尝试了几个不同版本的 commons-chain.jar (1.1 & 1.2) 但没有帮助。我也用谷歌搜索了几个小时，找不到任何解决方案。这里的实际问题是什么？缺少 .jar 是否真的导致 servlet 正确初始化？
p.s. 我知道...Struts 早已过时且不再广泛使用，但出于某些原因我不得不这样做。如有任何帮助，我们将不胜感激。
图书馆：
完整错误日志：
Nov 9, 2018 4:00:25 PM org.apache.struts.action.ActionServlet init
SEVERE: Unable to initialize Struts ActionServlet due to an unexpected exception or error thrown, so marking the servlet as unavailable. Most likely, this is due to an incorrect or missing library dependency.
java.lang.NoClassDefFoundError: org/apache/commons/chain/config/ConfigParser
at org.apache.struts.action.ActionServlet.initChain(ActionServlet.java:1680)
at org.apache.struts.action.ActionServlet.init(ActionServlet.java:350)
at javax.servlet.GenericServlet.init(GenericServlet.java:256)
at weblogic.servlet.internal.StubSecurityHelper$ServletInitAction.run(StubSecurityHelper.java:278)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121)
at weblogic.servlet.internal.StubSecurityHelper.createServlet(StubSecurityHelper.java:64)
at weblogic.servlet.internal.StubLifecycleHelper.createOneInstance(StubLifecycleHelper.java:58)
at weblogic.servlet.internal.StubLifecycleHelper.<init>(StubLifecycleHelper.java:48)
at weblogic.servlet.internal.ServletStubImpl.prepareServlet(ServletStubImpl.java:507)
at weblogic.servlet.internal.WebAppServletContext.preloadServlet(WebAppServletContext.java:1723)
at weblogic.servlet.internal.WebAppServletContext.loadServletsOnStartup(WebAppServletContext.java:1700)
at weblogic.servlet.internal.WebAppServletContext.preloadResources(WebAppServletContext.java:1620)
at weblogic.servlet.internal.WebAppServletContext.start(WebAppServletContext.java:2761)
at weblogic.servlet.internal.WebAppModule.startContexts(WebAppModule.java:889)
at weblogic.servlet.internal.WebAppModule.start(WebAppModule.java:333)
at weblogic.application.internal.flow.ModuleStateDriver.next(ModuleStateDriver.java:204)
at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:26)
at weblogic.application.internal.flow.ModuleStateDriver.start(ModuleStateDriver.java:60)
at weblogic.application.internal.flow.ScopedModuleDriver.start(ScopedModuleDriver.java:200)
at weblogic.application.internal.flow.ModuleListenerInvoker.start(ModuleListenerInvoker.java:117)
at weblogic.application.internal.flow.ModuleStateDriver.next(ModuleStateDriver.java:204)
at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:26)
at weblogic.application.internal.flow.ModuleStateDriver.start(ModuleStateDriver.java:60)
at weblogic.application.internal.flow.StartModulesFlow.activate(StartModulesFlow.java:26)
at weblogic.application.internal.BaseDeployment.next(BaseDeployment.java:635)
at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:26)
at weblogic.application.internal.BaseDeployment.activate(BaseDeployment.java:212)
at weblogic.application.internal.DeploymentStateChecker.activate(DeploymentStateChecker.java:154)
at weblogic.deploy.internal.targetserver.AppContainerInvoker.activate(AppContainerInvoker.java:80)
at weblogic.deploy.internal.targetserver.operations.AbstractOperation.activate(AbstractOperation.java:566)
at weblogic.deploy.internal.targetserver.operations.ActivateOperation.activateDeployment(ActivateOperation.java:136)
at weblogic.deploy.internal.targetserver.operations.ActivateOperation.doCommit(ActivateOperation.java:104)
at weblogic.deploy.internal.targetserver.operations.AbstractOperation.commit(AbstractOperation.java:320)
at weblogic.deploy.internal.targetserver.DeploymentManager.handleDeploymentCommit(DeploymentManager.java:815)
at weblogic.deploy.internal.targetserver.DeploymentManager.activateDeploymentList(DeploymentManager.java:1222)
at weblogic.deploy.internal.targetserver.DeploymentManager.handleCommit(DeploymentManager.java:433)
at weblogic.deploy.internal.targetserver.DeploymentServiceDispatcher.commit(DeploymentServiceDispatcher.java:161)
at weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer.doCommitCallback(DeploymentReceiverCallbackDeliverer.java:181)
at weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer.access0(DeploymentReceiverCallbackDeliverer.java:12)
at weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer.run(DeploymentReceiverCallbackDeliverer.java:67)
at weblogic.work.ServerWorkManagerImpl$WorkAdapterImpl.run(ServerWorkManagerImpl.java:518)
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:209)
at weblogic.work.ExecuteThread.run(ExecuteThread.java:181)
<Nov 9, 2018 4:00:25 PM SGT> <Error> <HTTP> <BEA-101216> <Servlet: "action" failed to preload on startup in Web application: "StrutsExample".
javax.servlet.UnavailableException: org/apache/commons/chain/config/ConfigParser
at org.apache.struts.action.ActionServlet.init(ActionServlet.java:402)
at javax.servlet.GenericServlet.init(GenericServlet.java:256)
at weblogic.servlet.internal.StubSecurityHelper$ServletInitAction.run(StubSecurityHelper.java:278)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121)
Truncated. see log file for complete stacktrace
>
参考此 article，清除 WebLogic 服务器缓存会有所帮助。所以它根据我的问题在这里做了。我只是删除了 tmp 文件夹，错误现在消失了。
Weblogic Cache exists in $MW_HOME/user_projects/domains/ccg/servers/AdminServer/tmp I had named my domain ccg. You can replace that with your domain name in the above path.
p.s。上述路径下的文件夹 tmp、cache 和 logs 可以安全删除。