发布时发生Eclipse Juno空指针错误

我刚升级到 现在，当我试图发布到ApacheTomcat7.0.30时，出现了一个错误。错误是：

java.lang.NullPointerException
    at java.io.FileInputStream.<init>(Unknown Source)
    at org.eclipse.wst.server.core.util.PublishHelper.copyFile(PublishHelper.java:501)
    at org.eclipse.wst.server.core.util.PublishHelper.copy(PublishHelper.java:563)
    at org.eclipse.wst.server.core.util.PublishHelper.publishFull(PublishHelper.java:537)
    at org.eclipse.wst.server.core.util.PublishHelper.copy(PublishHelper.java:554)
    at org.eclipse.wst.server.core.util.PublishHelper.publishFull(PublishHelper.java:537)
    at org.eclipse.wst.server.core.util.PublishHelper.copy(PublishHelper.java:554)
    at org.eclipse.wst.server.core.util.PublishHelper.publishFull(PublishHelper.java:537)
    at org.eclipse.jst.server.tomcat.core.internal.PublishOperation2.publishDir(PublishOperation2.java:132)
    at org.eclipse.jst.server.tomcat.core.internal.PublishOperation2.execute(PublishOperation2.java:82)
    at org.eclipse.wst.server.core.model.ServerBehaviourDelegate.performTasks(ServerBehaviourDelegate.java:1290)
    at org.eclipse.wst.server.core.model.ServerBehaviourDelegate.publish(ServerBehaviourDelegate.java:933)
    at org.eclipse.wst.server.core.model.ServerBehaviourDelegate.publish(ServerBehaviourDelegate.java:774)
    at org.eclipse.wst.server.core.internal.Server.publishImpl(Server.java:3108)
    at org.eclipse.wst.server.core.internal.Server$PublishJob.run(Server.java:345)
    at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)

请注意，我干净地安装了Juno，为它创建了一个新的工作区，即没有复制/转换/重命名旧的eclipse工作区，而是在Juno中从头开始创建了服务器

短暂性脑缺血发作