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java.lang.NullPointerException: 	at java.io.FileInputStream.(Unknown Source)	at org.eclipse.wst.server.core.util.PublishHelper.copyFile(PublishHelper.java:501)	at org.eclipse.wst.server.core.util.PublishHelper.publishDelta(PublishHelper.java:435)	at org.eclipse.wst.server.core.util.PublishHelper.publishDelta(PublishHelper.java:459)	at org.eclipse.wst.server.core.util.PublishHelper.publishDelta(PublishHelper.java:459)	at org.eclipse.jst.server.tomcat.core.internal.PublishOperation2.publishDir(PublishOperation2.java:141)	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:3087)	at org.eclipse.wst.server.core.internal.Server$PublishJob.run(Server.java:345)	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)