Question

Eclipse 4.4.2v2015024-1700

我正在尝试启动一个本地Tomcat 7服务器，这是一个我在几年内没有修改的旧项目。我能够启动服务器并在今天早上启动，然后我进行了一些代码更改，需要更新版本的共享库，因此我使用新版本号更新了相关的POM。我关闭了tomcat服务器，然后尝试重新启动它，它一直陷入这个永久性的错误

"Could not publish to the server.
java.lang.NullPointerException"

我尝试过的事情：

从服务器添加/删除模块
添加一个全新的服务器减去模块，然后再添加
重启Eclipse
清理所有相关项目
更新所有maven依赖项

有什么想法吗？

Workspace > .metadata > .log file

中的相关日志条目

!ENTRY org.eclipse.wst.server.core 4 0 2018-02-27 15:30:03.862
!MESSAGE Could not publish to the server.
!STACK 0
java.lang.NullPointerException
    at org.eclipse.wst.common.componentcore.internal.impl.WorkbenchComponentImpl.getFirstTaggedRootSource(WorkbenchComponentImpl.java:234)
    at org.eclipse.wst.common.componentcore.internal.impl.WorkbenchComponentImpl.getDefaultSourceRoot(WorkbenchComponentImpl.java:587)
    at org.eclipse.wst.common.componentcore.internal.resources.VirtualResource.getProjectRelativePaths(VirtualResource.java:133)
    at org.eclipse.wst.common.componentcore.internal.resources.VirtualFile.getUnderlyingFiles(VirtualFile.java:104)
    at org.eclipse.wst.common.componentcore.internal.resources.VirtualFile.getUnderlyingResources(VirtualFile.java:93)
    at org.eclipse.wst.common.componentcore.internal.resources.VirtualResource.exists(VirtualResource.java:88)
    at org.eclipse.jst.common.internal.modulecore.util.ManifestUtilities.getNonBinaryComponentManifest(ManifestUtilities.java:124)
    at org.eclipse.jst.common.internal.modulecore.util.ManifestUtilities.getManifest(ManifestUtilities.java:81)
    at org.eclipse.jst.common.internal.modulecore.util.ManifestUtilities.getManifestClasspath(ManifestUtilities.java:147)
    at org.eclipse.jst.j2ee.componentcore.J2EEModuleVirtualComponent.getManifestClasspath(J2EEModuleVirtualComponent.java:248)
    at org.eclipse.jst.j2ee.componentcore.J2EEModuleVirtualComponent.calculateManifestReferences(J2EEModuleVirtualComponent.java:368)
    at org.eclipse.jst.j2ee.componentcore.J2EEModuleVirtualComponent.cacheManifestReferences(J2EEModuleVirtualComponent.java:360)
    at org.eclipse.jst.j2ee.componentcore.J2EEModuleVirtualComponent.getReferences(J2EEModuleVirtualComponent.java:176)
    at org.eclipse.jst.j2ee.componentcore.J2EEModuleVirtualComponent.getReferences(J2EEModuleVirtualComponent.java:214)
    at org.eclipse.jst.j2ee.componentcore.J2EEModuleVirtualComponent.getReferences(J2EEModuleVirtualComponent.java:207)
    at org.eclipse.jst.common.internal.modulecore.SingleRootUtil.hasConsumableReferences(SingleRootUtil.java:217)
    at org.eclipse.jst.common.internal.modulecore.SingleRootUtil.validateSingleRoot(SingleRootUtil.java:165)
    at org.eclipse.jst.common.internal.modulecore.SingleRootUtil.isSingleRoot(SingleRootUtil.java:93)
    at org.eclipse.jst.common.internal.modulecore.SingleRootExportParticipant.canOptimize(SingleRootExportParticipant.java:88)
    at org.eclipse.wst.common.componentcore.internal.flat.FlatVirtualComponent.canOptimize(FlatVirtualComponent.java:203)
    at org.eclipse.wst.common.componentcore.internal.flat.FlatVirtualComponent.cacheResources(FlatVirtualComponent.java:185)
    at org.eclipse.wst.common.componentcore.internal.flat.FlatVirtualComponent.fetchResources(FlatVirtualComponent.java:118)
    at org.eclipse.wst.web.internal.deployables.FlatComponentDeployable.members(FlatComponentDeployable.java:227)
    at org.eclipse.jst.j2ee.internal.deployables.J2EEFlexProjDeployable.members(J2EEFlexProjDeployable.java:267)
    at org.eclipse.wst.server.core.internal.ModulePublishInfo.fillCache(ModulePublishInfo.java:314)
    at org.eclipse.wst.server.core.internal.ModulePublishInfo.getDelta(ModulePublishInfo.java:396)
    at org.eclipse.wst.server.core.internal.ServerPublishInfo.getDelta(ServerPublishInfo.java:366)
    at org.eclipse.wst.server.core.internal.Server.getPublishedResourceDelta(Server.java:1575)
    at org.eclipse.wst.server.core.model.ServerBehaviourDelegate.getPublishedResourceDelta(ServerBehaviourDelegate.java:698)
    at org.eclipse.jst.server.tomcat.core.internal.TomcatServerBehaviour.getPublishedResourceDelta(TomcatServerBehaviour.java:958)
    at org.eclipse.wst.server.core.model.ServerBehaviourDelegate.computeDelta(ServerBehaviourDelegate.java:874)
    at org.eclipse.wst.server.core.model.ServerBehaviourDelegate.publish(ServerBehaviourDelegate.java:909)
    at org.eclipse.wst.server.core.model.ServerBehaviourDelegate.publish(ServerBehaviourDelegate.java:774)
    at org.eclipse.wst.server.core.internal.Server.publishImpl(Server.java:3157)
    at org.eclipse.wst.server.core.internal.Server$PublishJob.run(Server.java:345)
    at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)

Answer 1

我无法解释为什么昨天这似乎不起作用，但这解决了我的问题：

从备份中恢复eclipse。
创建新的工作空间。
导入现有的Maven项目。
添加本地嵌入式Tomcat服务器并将项目设置为模块。
启动服务器。

我发布问题的唯一不同之处是＃1。我无法帮助，但认为工作空间或二进制文件中的某个eclipse组件昨天以某种方式被破坏了。

无法发布到Tomcat 7服务器NullPointerException

1 个答案: