java.lang.NullPointerException
   at org.netbeans.modules.j2ee.deployment.impl.ServerFileDistributor._distributeOnSave(ServerFileDistributor.java:274)
   at org.netbeans.modules.j2ee.deployment.impl.ServerFileDistributor.distributeOnSave(ServerFileDistributor.java:206)
   at org.netbeans.modules.j2ee.deployment.impl.TargetServer.distributeChangesOnSave(TargetServer.java:275)
   at org.netbeans.modules.j2ee.deployment.impl.TargetServer.notifyArtifactsUpdated(TargetServer.java:909)
   at org.netbeans.modules.j2ee.deployment.impl.DeployOnSaveManager$DeployTask.notifyServer(DeployOnSaveManager.java:555)
   at org.netbeans.modules.j2ee.deployment.impl.DeployOnSaveManager$DeployTask.run(DeployOnSaveManager.java:459)
   at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
   at java.util.concurrent.FutureTask.run(FutureTask.java:266)
   at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
   at java.lang.Thread.run(Thread.java:745)