java.lang.reflect.InvocationTargetException: This exception has no message.

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java.lang.NullPointerException:
at java.util.Hashtable.put(Hashtable.java:396)
at java.util.Properties.setProperty(Properties.java:128)
at oracle.toplink.essentials.internal.ejb.cmp3.xml.PersistenceContentHandler.startElement(PersistenceContentHandler.java:89)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(AbstractSAXParser.java:533)
at com.sun.org.apache.xerces.internal.parsers.AbstractXMLDocumentParser.emptyElement(AbstractXMLDocumentParser.java:220)
at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(XMLNSDocumentScannerImpl.java:322)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(XMLDocumentFragmentScannerImpl.java:1693)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:368)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:834)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:764)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:148)
at oracle.toplink.essentials.ejb.cmp3.persistence.PersistenceUnitProcessor.processPersistenceXML(PersistenceUnitProcessor.java:175)
at oracle.toplink.essentials.ejb.cmp3.persistence.PersistenceUnitProcessor.processDirectory(PersistenceUnitProcessor.java:84)
at oracle.toplink.essentials.ejb.cmp3.persistence.PersistenceUnitProcessor.processPersistenceArchive(PersistenceUnitProcessor.java:148)
at oracle.toplink.essentials.ejb.cmp3.persistence.PersistenceUnitProcessor.getPersistenceUnits(PersistenceUnitProcessor.java:64)
at oracle.toplink.essentials.internal.ejb.cmp3.JavaSECMPInitializer.initPersistenceUnits(JavaSECMPInitializer.java:278)
at oracle.toplink.essentials.internal.ejb.cmp3.JavaSECMPInitializer.initialize(JavaSECMPInitializer.java:301)
at oracle.toplink.essentials.internal.ejb.cmp3.JavaSECMPInitializer.initializeFromAgent(JavaSECMPInitializer.java:318)
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:585)
at oracle.toplink.essentials.internal.ejb.cmp3.JavaSECMPInitializerAgent.initializeFromAgent(JavaSECMPInitializerAgent.java:54)
at oracle.toplink.essentials.internal.ejb.cmp3.JavaSECMPInitializerAgent.premain(JavaSECMPInitializerAgent.java:47)
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:585)

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