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我刚刚升级到现在尝试发布到 Apache Tomcat 7.0.30 时出现错误。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，我对 Juno 进行了全新安装，为它创建了一个新工作区（即没有复制/转换/重命名旧的 eclipse 工作区）并在 Juno 中从头开始创建服务器！

TIA

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