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

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at org.jvnet.glassfish.comms.admin.config.ConfigAdapter.registerEventListeners(
at org.jvnet.glassfish.comms.admin.config.ConfigAdapter.register(
at org.jvnet.glassfish.comms.startup.SipContainer.registerConfig(
at org.jvnet.glassfish.comms.admin.pluggable.extensions.sip.SipAdminExtensionFeatureImpl.registerEventListeners(
at com.sun.enterprise.server.ApplicationServer.onInitialization(
at com.sun.enterprise.server.ondemand.OnDemandServer.onInitialization(
at com.sun.enterprise.server.PEMain.main(
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(
at sun.reflect.DelegatingMethodAccessorImpl.invoke(
at java.lang.reflect.Method.invoke(
at com.sun.enterprise.server.PELaunch.main(

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