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Build: NetBeans IDE 6.0 Beta 2 (Build 200710212201) VM: Java HotSpot(TM) Client VM, 1.6.0_03-b05 OS: Linux, 2.6.22-14-generic, i386 User comments: I have added JBoss 4.2.1 GA server to Tools -> Servers. STACKTRACE: (first 10 lines) java.lang.NullPointerException at java.io.File.<init>(File.java:222) at org.netbeans.modules.j2ee.jboss4.util.JBProperties.getRootDir(JBProperties.java:124) at org.netbeans.modules.j2ee.jboss4.JBDeploymentManager.getRMIServer(JBDeploymentManager.java:165) at org.netbeans.modules.j2ee.jboss4.JBDeploymentManager.refreshRMIServer(JBDeploymentManager.java:218) at org.netbeans.modules.j2ee.jboss4.nodes.Util.getMBeanParameter(Util.java:202) at org.netbeans.modules.j2ee.jboss4.ide.JBStartServer$1.run(JBStartServer.java:232) at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:561) at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:986)
*** This issue has been marked as a duplicate of 120321 ***