java.lang.NullPointerException: This exception has no message.

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java.lang.NullPointerException:
at com.sun.enterprise.management.util.J2EEManagementObjectManager.registerApplicationAndItsComponents(J2EEManagementObjectManager.java:239)
at com.sun.enterprise.management.util.J2EEManagementObjectManager.registerApplication(J2EEManagementObjectManager.java:83)
at com.sun.enterprise.server.J2EEServer.registerAndRestoreApplicationState(J2EEServer.java:498)
at com.sun.enterprise.server.J2EEServer.run(J2EEServer.java:300)
at com.sun.enterprise.server.J2EEServer.main(J2EEServer.java:720)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.apache.commons.launcher.ChildMain.run(ChildMain.java:280)

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