Ubuntu-server Alfresco 之前工作正常，但现在我遇到了一些错误。除了通过 Web 界面更改管理员密码和清理旧日志文件之外，我什么也没做。
现在我收到 404 错误。日志如下：
11:40:10,390 ERROR [org.springframework.web.context.ContextLoader] Context initialization failed
org.alfresco.service.cmr.rendition.RenditionServiceException: 09250000 Unable to find rendering action root node.
at org.alfresco.repo.rendition.RenditionDefinitionPersisterImpl.checkRenderingActionRootNodeExists(RenditionDefinitionPersisterImpl.java:199)
at org.alfresco.repo.rendition.RenditionDefinitionPersisterImpl.findActionNode(RenditionDefinitionPersisterImpl.java:154)
at org.alfresco.repo.rendition.RenditionDefinitionPersisterImpl.findOrCreateActionNode(RenditionDefinitionPersisterImpl.java:177)
at org.alfresco.repo.rendition.RenditionDefinitionPersisterImpl.saveRenditionDefinition(RenditionDefinitionPersisterImpl.java:143)
at org.alfresco.repo.rendition.RenditionServiceImpl.saveRenditionDefinition(RenditionServiceImpl.java:233)
at org.alfresco.repo.thumbnail.ThumbnailRegistry$1.doWork(ThumbnailRegistry.java:160)
at org.alfresco.repo.thumbnail.ThumbnailRegistry$1.doWork(ThumbnailRegistry.java:149)
at org.alfresco.repo.security.authentication.AuthenticationUtil.runAs(AuthenticationUtil.java:508)
at org.alfresco.repo.thumbnail.ThumbnailRegistry.initThumbnailDefinitions(ThumbnailRegistry.java:148)
at org.alfresco.repo.thumbnail.ThumbnailRegistry.access$400(ThumbnailRegistry.java:49)
at org.alfresco.repo.thumbnail.ThumbnailRegistry$RegistryLifecycle.onBootstrap(ThumbnailRegistry.java:271)
at org.springframework.extensions.surf.util.AbstractLifecycleBean.onApplicationEvent(AbstractLifecycleBean.java:56)
at org.alfresco.repo.thumbnail.ThumbnailRegistry.onApplicationEvent(ThumbnailRegistry.java:255)
at org.alfresco.repo.thumbnail.ThumbnailRegistry.onApplicationEvent(ThumbnailRegistry.java:49)
at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:97)
at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:294)
at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:858)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:419)
at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:261)
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:192)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:47)
at org.alfresco.web.app.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:63)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3972)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4467)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:546)
at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:637)
at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:563)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:498)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1277)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:321)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:785)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
at org.apache.catalina.core.StandardService.start(StandardService.java:519)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
at org.apache.catalina.startup.Catalina.start(Catalina.java:581)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
有谁知道可能出了什么问题？如果您要求，我可以提供更多信息；告诉我你想看什么。
所以，我已经完成了 Gagravarr 所说的一切，感谢他。错误“根节点”已消失。我遇到了一些新错误，但都已修复，除了一个：将尝试自己解决。如果没有，我会再次在这里问。谢谢！