EJB:nested  exception is Java.lang.NullpointerException

Our application is using WLS8.1 sp6 and developed based on EJB,Struts and J2EE.My problem is that the following exception
"EJB Exception: ; nested exception is:
     java.lang.NullPointerException"
is occuring sporadically over a week.I know why a NPE occurs but not sure what caused that NPE to occur sometimes and defer most of the times.
Could anyone of you shed some light on this?

Transaction was rolled back: java.lang.NullPointerException
Is a value added for a NOT NULL column null?

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    at com.sco.tta.server.services.ServiceRegister.startService(ServiceRegister.java:576)
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    Hello every body,
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    The entities Users ,and Products are created ,
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    package com.prapansol.demos;
    import java.util.List;
    import javax.ejb.EJB;
    import com.xyz.demos.ejb30.Users;
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    import javax.persistence.EntityManagerFactory;
    import javax.persistence.Persistence;
    import javax.persistence.PersistenceContext;
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    }catch(Exception e){
    System.out.println(e.getClass().getName());
    System.out.println(e.getMessage());
    e.printStackTrace();
    return users;
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    this.manager = manager;
    public EntityManager getEntityManager() {
    return manager;
    public static void main(String[] args) {
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    List<Users> users=client.queryUsersFindAll();
         for(Users user : users ){System.out.println(""+user.getFirstName()+user.getLastName()); }
    The persistence.xml file is:
    <?xml version="1.0" encoding="UTF-8" ?>
    <persistence xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd"
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    <class>com.xyz.demos.ejb30.Products</class>
    <class>com.xyz..demos.ejb30.ServiceRequests</class>
    <class>com.xyz.demos.ejb30.ServiceHistories</class>
    <class>com.xyz.demos.ejb30.ExpertiseAreas</class>
    <properties>
    <property name="jdbc.driver" value="oracle.jdbc.driver.OracleDriver"/>
    <property name="jdbc.connection.string" value="jdbc:oracle:thin:@localhost:1521:ORCL"/>
    <property name="jdbc.user" value="scott"/>
    <property name="jdbc.password" value="tiger"/>
    <property name="toplink.logging.level" value="INFO"/>
    </properties>
    </persistence-unit>
    </persistence>
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    [TopLink Config]: 2007.03.23 01:36:15.323--ServerSession(32012057)--Thread(Thread[main,5,main])--The alias name for the entity class [class com.prapansol.demos.technology.Users] is being defaulted to: Users.
    [TopLink Config]: 2007.03.23 01:36:15.335--ServerSession(32012057)--Thread(Thread[main,5,main])--The table name for entity [class com.prapansol.demos.technology.Users] is being defaulted to: USERS.
    [TopLink Config]: 2007.03.23 01:36:15.360--ServerSession(32012057)--Thread(Thread[main,5,main])--The column name for element [private java.lang.String com.prapansol.demos.technology.Users.city] is being defaulted to: CITY.
    [TopLink Config]: 2007.03.23 01:36:15.377--ServerSession(32012057)--Thread(Thread[main,5,main])--The column name for element [private java.lang.String com.prapansol.demos.technology.Users.email] is being defaulted to: EMAIL.
    [TopLink Config]: 2007.03.23 01:36:15.431--ServerSession(32012057)--Thread(Thread[main,5,main])--The alias name for the entity class [class com.prapansol.demos.technology.ServiceHistories] is being defaulted to: ServiceHistories.
    [TopLink Config]: 2007.03.23 01:36:15.435--ServerSession(32012057)--Thread(Thread[main,5,main])--The column name for element [private java.lang.String com.prapansol.demos.technology.ServiceHistories.notes] is being defaulted to: NOTES.
    [TopLink Config]: 2007.03.23 01:36:15.456--ServerSession(32012057)--Thread(Thread[main,5,main])--The alias name for the entity class [class com.prapansol.demos.technology.ServiceRequests] is being defaulted to: ServiceRequests.
    [TopLink Config]: 2007.03.23 01:36:15.460--ServerSession(32012057)--Thread(Thread[main,5,main])--The column name for element [private java.lang.String com.prapansol.demos.technology.ServiceRequests.status] is being defaulted to: STATUS.
    [TopLink Config]: 2007.03.23 01:36:15.461--ServerSession(32012057)--Thread(Thread[main,5,main])--The alias name for the entity class [class com.prapansol.demos.technology.Products] is being defaulted to: Products.
    [TopLink Config]: 2007.03.23 01:36:15.464--ServerSession(32012057)--Thread(Thread[main,5,main])--The table name for entity [class com.prapansol.demos.technology.Products] is being defaulted to: PRODUCTS.
    [TopLink Config]: 2007.03.23 01:36:15.466--ServerSession(32012057)--Thread(Thread[main,5,main])--The column name for element [private java.lang.String com.prapansol.demos.technology.Products.description] is being defaulted to: DESCRIPTION.
    [TopLink Config]: 2007.03.23 01:36:15.466--ServerSession(32012057)--Thread(Thread[main,5,main])--The column name for element [private java.lang.String com.prapansol.demos.technology.Products.image] is being defaulted to: IMAGE.
    [TopLink Config]: 2007.03.23 01:36:15.467--ServerSession(32012057)--Thread(Thread[main,5,main])--The column name for element [private java.lang.String com.prapansol.demos.technology.Products.name] is being defaulted to: NAME.
    [TopLink Config]: 2007.03.23 01:36:15.468--ServerSession(32012057)--Thread(Thread[main,5,main])--The alias name for the entity class [class com.prapansol.demos.technology.ExpertiseAreas] is being defaulted to: ExpertiseAreas.
    [TopLink Config]: 2007.03.23 01:36:15.470--ServerSession(32012057)--Thread(Thread[main,5,main])--The column name for element [private java.lang.String com.prapansol.demos.technology.ExpertiseAreas.notes] is being defaulted to: NOTES.
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    [TopLink Config]: 2007.03.23 01:36:15.579--ServerSession(32012057)--Thread(Thread[main,5,main])--The target entity (reference) class for the many to one mapping element [private com.prapansol.demos.technology.ServiceRequests com.prapansol.demos.technology.ServiceHistories.serviceRequests] is being defaulted to: class com.prapansol.demos.technology.ServiceRequests.
    [TopLink Config]: 2007.03.23 01:36:15.592--ServerSession(32012057)--Thread(Thread[main,5,main])--The target entity (reference) class for the one to many mapping element [private java.util.List com.prapansol.demos.technology.Users.serviceHistoriesList] is being defaulted to: class com.prapansol.demos.technology.ServiceHistories.
    [TopLink Config]: 2007.03.23 01:36:15.593--ServerSession(32012057)--Thread(Thread[main,5,main])--The target entity (reference) class for the many to one mapping element [private com.prapansol.demos.technology.Users com.prapansol.demos.technology.ServiceHistories.users] is being defaulted to: class com.prapansol.demos.technology.Users.
    [TopLink Config]: 2007.03.23 01:36:15.593--ServerSession(32012057)--Thread(Thread[main,5,main])--The target entity (reference) class for the one to many mapping element [private java.util.List com.prapansol.demos.technology.Users.expertiseAreasList] is being defaulted to: class com.prapansol.demos.technology.ExpertiseAreas.
    [TopLink Config]: 2007.03.23 01:36:15.594--ServerSession(32012057)--Thread(Thread[main,5,main])--The target entity (reference) class for the many to one mapping element [private com.prapansol.demos.technology.Users com.prapansol.demos.technology.ExpertiseAreas.users] is being defaulted to: class com.prapansol.demos.technology.Users.
    [TopLink Config]: 2007.03.23 01:36:15.594--ServerSession(32012057)--Thread(Thread[main,5,main])--The target entity (reference) class for the many to one mapping element [private com.prapansol.demos.technology.Products com.prapansol.demos.technology.ExpertiseAreas.products] is being defaulted to: class com.prapansol.demos.technology.Products.
    [TopLink Config]: 2007.03.23 01:36:15.595--ServerSession(32012057)--Thread(Thread[main,5,main])--The target entity (reference) class for the one to many mapping element [private java.util.List com.prapansol.demos.technology.Products.expertiseAreasList] is being defaulted to: class com.prapansol.demos.technology.ExpertiseAreas.
    [TopLink Finer]: 2007.03.23 01:36:15.600--ServerSession(32012057)--Thread(Thread[main,5,main])--Weaver processing class [com.prapansol.demos.technology.Users].
    [TopLink Finer]: 2007.03.23 01:36:15.601--ServerSession(32012057)--Thread(Thread[main,5,main])--Weaver processing class [com.prapansol.demos.technology.ServiceHistories].
    [TopLink Finer]: 2007.03.23 01:36:15.601--ServerSession(32012057)--Thread(Thread[main,5,main])--Weaver processing class [com.prapansol.demos.technology.ServiceRequests].
    [TopLink Finer]: 2007.03.23 01:36:15.601--ServerSession(32012057)--Thread(Thread[main,5,main])--Weaver processing class [com.prapansol.demos.technology.ExpertiseAreas].
    [TopLink Finer]: 2007.03.23 01:36:15.602--ServerSession(32012057)--Thread(Thread[main,5,main])--Weaver processing class [com.prapansol.demos.technology.Products].
    [TopLink Finer]: 2007.03.23 01:36:15.604--Thread(Thread[main,5,main])--cmp_init_globalInstrumentation_is_null
    [TopLink Finest]: 2007.03.23 01:36:15.613--ServerSession(32012057)--Thread(Thread[main,5,main])--begin deploying Persistence Unit EJB; state Predeployed; deploymentCount 0
    [TopLink Finest]: 2007.03.23 01:36:15.633--ServerSession(32012057)--Thread(Thread[main,5,main])--property=toplink.logging.level; value=FINEST; translated value=FINEST
    [TopLink Finest]: 2007.03.23 01:36:15.634--ServerSession(32012057)--Thread(Thread[main,5,main])--property=toplink.logging.level; value=FINEST; translated value=FINEST
    [TopLink Info]: 2007.03.23 01:36:15.639--ServerSession(32012057)--Thread(Thread[main,5,main])--TopLink, version: Oracle TopLink Essentials - 2006.8 (Build 060829)
    [TopLink Finest]: 2007.03.23 01:36:15.646--ServerSession(32012057)--Thread(Thread[main,5,main])--end deploying
    Persistence Unit EJB; state Undeployed; deploymentCount 0
    Here is the Stack Trace:
    Exception in thread "main" java.lang.NullPointerException
         at sun.jdbc.odbc.JdbcOdbcDriver.initialize(JdbcOdbcDriver.java:436)
         at sun.jdbc.odbc.JdbcOdbcDriver.connect(JdbcOdbcDriver.java:153)
         at java.sql.DriverManager.getConnection(DriverManager.java:525)
         at java.sql.DriverManager.getConnection(DriverManager.java:140)
         at oracle.toplink.essentials.sessions.DefaultConnector.connect(DefaultConnector.java:85)
         at oracle.toplink.essentials.sessions.DatasourceLogin.connectToDatasource(DatasourceLogin.java:170)
         at oracle.toplink.essentials.internal.sessions.DatabaseSessionImpl.loginAndDetectDatasource(DatabaseSessionImpl.java:537)
         at oracle.toplink.essentials.ejb.cmp3.EntityManagerFactoryProvider.login(EntityManagerFactoryProvider.java:180)
         at oracle.toplink.essentials.internal.ejb.cmp3.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:230)
         at oracle.toplink.essentials.internal.ejb.cmp3.base.EntityManagerFactoryImpl.getServerSession(EntityManagerFactoryImpl.java:84)
         at oracle.toplink.essentials.internal.ejb.cmp3.base.EntityManagerFactoryImpl.createEntityManagerImpl(EntityManagerFactoryImpl.java:127)
         at oracle.toplink.essentials.internal.ejb.cmp3.base.EntityManagerFactoryImpl.createEntityManagerImpl(EntityManagerFactoryImpl.java:121)
         at oracle.toplink.essentials.internal.ejb.cmp3.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:76)
         at com.prapansol.demos.Client.<init>(Client.java:29)
         at com.prapansol.demos.Client.main(Client.java:83)
    where am I doing wrong?
    Why does sun.jdbc.odbc.JdbcOdbcDriver.initialize method get called when I'm using Oracle DataBase?
    Am I missing any thing ?
    I'll be thankful if any one help me find my fault?
    Thanking you in Advance,
    Regards,
    Samba

    Check the property names for configuring TopLink's internal connection pool. All of the JDBC property names should be prefixed with toplink.
    Refer to the TopLink JPA extensions guide for more information.
    http://www.oracle.com/technology/products/ias/toplink/jpa/resources/toplink-jpa-extensions.html
    Doug

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    import java.awt.Component;
    import java.awt.Container;
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    Component class : com.sap.portal.admin.acleditor.ACLEditor
    User : TESTUSER
         at com.sapportals.portal.prt.core.PortalRequestManager.handlePortalComponentException(PortalRequestManager.java:973)
         at com.sapportals.portal.prt.core.PortalRequestManager.callPortalComponent(PortalRequestManager.java:343)
         at com.sapportals.portal.prt.core.PortalRequestManager.dispatchRequest(PortalRequestManager.java:136)
         at com.sapportals.portal.prt.core.PortalRequestManager.dispatchRequest(PortalRequestManager.java:189)
         at com.sapportals.portal.prt.component.PortalComponentResponse.include(PortalComponentResponse.java:215)
         at com.sapportals.portal.prt.pom.PortalNode.service(PortalNode.java:645)
         at com.sapportals.portal.prt.core.PortalRequestManager.callPortalComponent(PortalRequestManager.java:328)
         at com.sapportals.portal.prt.core.PortalRequestManager.dispatchRequest(PortalRequestManager.java:136)
         at com.sapportals.portal.prt.core.PortalRequestManager.dispatchRequest(PortalRequestManager.java:189)
         at com.sapportals.portal.prt.core.PortalRequestManager.runRequestCycle(PortalRequestManager.java:753)
         at com.sapportals.portal.prt.connection.ServletConnection.handleRequest(ServletConnection.java:240)
         at com.sapportals.portal.prt.dispatcher.Dispatcher$doService.run(Dispatcher.java:524)
         at java.security.AccessController.doPrivileged(AccessController.java:242)
         at com.sapportals.portal.prt.dispatcher.Dispatcher.service(Dispatcher.java:407)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
         at com.sap.engine.services.servlets_jsp.server.servlet.InvokerServlet.service(InvokerServlet.java:156)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
         at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.runServlet(HttpHandlerImpl.java:401)
         at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.handleRequest(HttpHandlerImpl.java:266)
         at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:386)
         at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:364)
         at com.sap.engine.services.httpserver.server.RequestAnalizer.invokeWebContainer(RequestAnalizer.java:1039)
         at com.sap.engine.services.httpserver.server.RequestAnalizer.handle(RequestAnalizer.java:265)
         at com.sap.engine.services.httpserver.server.Client.handle(Client.java:95)
         at com.sap.engine.services.httpserver.server.Processor.request(Processor.java:175)
         at com.sap.engine.core.service630.context.cluster.session.ApplicationSessionMessageListener.process(ApplicationSessionMessageListener.java:33)
         at com.sap.engine.core.cluster.impl6.session.MessageRunner.run(MessageRunner.java:41)
         at com.sap.engine.core.thread.impl3.ActionObject.run(ActionObject.java:37)
         at java.security.AccessController.doPrivileged(AccessController.java:215)
         at com.sap.engine.core.thread.impl3.SingleThread.execute(SingleThread.java:102)
         at com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java:172)
    Caused by: java.lang.NullPointerException
         at com.sap.portal.admin.editor.pane.OutPane.calculatePEObjectId(OutPane.java:210)
         at com.sap.portal.admin.editor.pane.OutPane.createEditorLayout(OutPane.java:256)
         at com.sap.portal.admin.editor.pane.OutPane.setupComponent(OutPane.java:150)
         at com.sap.portal.admin.editor.pane.EditorPaneWrapper.mySetupComponent(EditorPaneWrapper.java:143)
         at com.sapportals.admin.wizardframework.components.FlowContainer.setupComponent(FlowContainer.java:129)
         at com.sapportals.admin.wizardframework.core.TrivialPaneFactory.getComponent(TrivialPaneFactory.java:35)
         at com.sapportals.admin.wizardframework.core.WizardInstance.doWizard(WizardInstance.java:229)
         at com.sap.portal.admin.editor.Editor.doWizard(Editor.java:605)
         at com.sap.portal.admin.editor.Editor.run(Editor.java:150)
         at com.sap.portal.admin.editor.AbstractEditorComponent.doContent(AbstractEditorComponent.java:59)
         at com.sapportals.portal.prt.component.AbstractPortalComponent.serviceDeprecated(AbstractPortalComponent.java:209)
         at com.sapportals.portal.prt.component.AbstractPortalComponent.service(AbstractPortalComponent.java:114)
         at com.sapportals.portal.prt.core.PortalRequestManager.callPortalComponent(PortalRequestManager.java:328)
         ... 29 more
    #1.5 #001125C00D9B007C000005E00017E09600044CCF2EFD55C4#1210352637138#com.sap.portal.prt.runtime#sap.com/irj#com.sap.portal.prt.runtime#TESTUSER#121429##mdt2ds111_SC1_1097250#TESTUSER#30ca97d01de611ddac19001125c00d9b#SAPEngine_Application_Thread[impl:3]_10##0#0#Error##Java###05:03_09/05/08_0167_1097250
    [EXCEPTION]
    #1#java.lang.NullPointerException
         at com.sap.portal.admin.editor.pane.OutPane.calculatePEObjectId(OutPane.java:210)
         at com.sap.portal.admin.editor.pane.OutPane.createEditorLayout(OutPane.java:256)
         at com.sap.portal.admin.editor.pane.OutPane.setupComponent(OutPane.java:150)
         at com.sap.portal.admin.editor.pane.EditorPaneWrapper.mySetupComponent(EditorPaneWrapper.java:143)
         at com.sapportals.admin.wizardframework.components.FlowContainer.setupComponent(FlowContainer.java:129)
         at com.sapportals.admin.wizardframework.core.TrivialPaneFactory.getComponent(TrivialPaneFactory.java:35)
         at com.sapportals.admin.wizardframework.core.WizardInstance.doWizard(WizardInstance.java:229)
         at com.sap.portal.admin.editor.Editor.doWizard(Editor.java:605)
         at com.sap.portal.admin.editor.Editor.run(Editor.java:150)
         at com.sap.portal.admin.editor.AbstractEditorComponent.doContent(AbstractEditorComponent.java:59)
         at com.sapportals.portal.prt.component.AbstractPortalComponent.serviceDeprecated(AbstractPortalComponent.java:209)
         at com.sapportals.portal.prt.component.AbstractPortalComponent.service(AbstractPortalComponent.java:114)
         at com.sapportals.portal.prt.core.PortalRequestManager.callPortalComponent(PortalRequestManager.java:328)
         at com.sapportals.portal.prt.core.PortalRequestManager.dispatchRequest(PortalRequestManager.java:136)
         at com.sapportals.portal.prt.core.PortalRequestManager.dispatchRequest(PortalRequestManager.java:189)
         at com.sapportals.portal.prt.component.PortalComponentResponse.include(PortalComponentResponse.java:215)
         at com.sapportals.portal.prt.pom.PortalNode.service(PortalNode.java:645)
         at com.sapportals.portal.prt.core.PortalRequestManager.callPortalComponent(PortalRequestManager.java:328)
         at com.sapportals.portal.prt.core.PortalRequestManager.dispatchRequest(PortalRequestManager.java:136)
         at com.sapportals.portal.prt.core.PortalRequestManager.dispatchRequest(PortalRequestManager.java:189)
         at com.sapportals.portal.prt.core.PortalRequestManager.runRequestCycle(PortalRequestManager.java:753)
         at com.sapportals.portal.prt.connection.ServletConnection.handleRequest(ServletConnection.java:240)
         at com.sapportals.portal.prt.dispatcher.Dispatcher$doService.run(Dispatcher.java:524)
         at java.security.AccessController.doPrivileged(AccessController.java:242)
         at com.sapportals.portal.prt.dispatcher.Dispatcher.service(Dispatcher.java:407)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
         at com.sap.engine.services.servlets_jsp.server.servlet.InvokerServlet.service(InvokerServlet.java:156)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
         at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.runServlet(HttpHandlerImpl.java:401)
         at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.handleRequest(HttpHandlerImpl.java:266)
         at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:386)
         at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:364)
         at com.sap.engine.services.httpserver.server.RequestAnalizer.invokeWebContainer(RequestAnalizer.java:1039)
         at com.sap.engine.services.httpserver.server.RequestAnalizer.handle(RequestAnalizer.java:265)
         at com.sap.engine.services.httpserver.server.Client.handle(Client.java:95)
         at com.sap.engine.services.httpserver.server.Processor.request(Processor.java:175)
         at com.sap.engine.core.service630.context.cluster.session.ApplicationSessionMessageListener.process(ApplicationSessionMessageListener.java:33)
         at com.sap.engine.core.cluster.impl6.session.MessageRunner.run(MessageRunner.java:41)
         at com.sap.engine.core.thread.impl3.ActionObject.run(ActionObject.java:37)
         at java.security.AccessController.doPrivileged(AccessController.java:215)
         at com.sap.engine.core.thread.impl3.SingleThread.execute(SingleThread.java:102)
         at com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java:172)
    =====================

    Praveen:
    I have already tried this and it did not fix the problem.
    Here is something more bizarre, I get the error when the copied roles are in 3rd folder level after Portal Content.
    For instance:
    1) Portal Content > Test Folder 1 (ZContentAdmin)  ....... NO ERROR
    2) Portal Content > Test Folder 1 > Test Folder 2 (ZContentAdmin) .......... NO ERROR
    3) Portal Content > Test Folder 1 > Test Folder 2 > Test Folder 3 (ZContentAdmin) ..... ERROR
    Just to reiterate, custom roles work fine, it is just when I do a Copy/Delta copy of SAP delivered content roles.....
    Looking for a solution.
    Khurram
    Edited by: Khurram Mahmudi on May 9, 2008 9:32 PM

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