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java.lang.NullPointerException: 	at java.lang.Class.forName0(Native Method)	at java.lang.Class.forName(Class.java:169)	at org.eclipse.birt.report.data.oda.jdbc.JDBCDriverManager.findDriver(JDBCDriverManager.java:746)	at org.eclipse.birt.report.data.oda.jdbc.JDBCDriverManager.registerDriver(JDBCDriverManager.java:903)	at org.eclipse.birt.report.data.oda.jdbc.JDBCDriverManager.doConnect(JDBCDriverManager.java:257)	at org.eclipse.birt.report.data.oda.jdbc.JDBCDriverManager.getConnection(JDBCDriverManager.java:214)	at org.eclipse.birt.report.data.oda.jdbc.Connection.connectByUrl(Connection.java:237)	at org.eclipse.birt.report.data.oda.jdbc.Connection.open(Connection.java:162)	at org.eclipse.datatools.connectivity.oda.consumer.helper.OdaConnection.open(OdaConnection.java:250)	at org.eclipse.birt.data.engine.odaconsumer.ConnectionManager.openConnection(ConnectionManager.java:165)	at org.eclipse.birt.data.engine.executor.DataSource.newConnection(DataSource.java:224)	at org.eclipse.birt.data.engine.executor.DataSource.open(DataSource.java:212)	at org.eclipse.birt.data.engine.impl.DataSourceRuntime.openOdiDataSource(DataSourceRuntime.java:217)	at org.eclipse.birt.data.engine.impl.QueryExecutor.openDataSource(QueryExecutor.java:407)	at org.eclipse.birt.data.engine.impl.QueryExecutor.prepareExecution(QueryExecutor.java:317)	at org.eclipse.birt.data.engine.impl.PreparedQuery.doPrepare(PreparedQuery.java:455)	at org.eclipse.birt.data.engine.impl.PreparedDataSourceQuery.produceQueryResults(PreparedDataSourceQuery.java:190)	at org.eclipse.birt.data.engine.impl.PreparedDataSourceQuery.execute(PreparedDataSourceQuery.java:178)	at org.eclipse.birt.data.engine.impl.PreparedOdaDSQuery.execute(PreparedOdaDSQuery.java:145)	at org.eclipse.birt.report.data.adapter.impl.DataRequestSessionImpl.execute(DataRequestSessionImpl.java:620)	at org.eclipse.birt.report.engine.data.dte.DteDataEngine.doExecuteQuery(DteDataEngine.java:152)	at org.eclipse.birt.report.engine.data.dte.DataGenerationEngine.doExecuteQuery(DataGenerationEngine.java:80)	at org.eclipse.birt.report.engine.data.dte.AbstractDataEngine.execute(AbstractDataEngine.java:267)	at org.eclipse.birt.report.engine.executor.ExecutionContext.executeQuery(ExecutionContext.java:1905)	at org.eclipse.birt.report.engine.executor.QueryItemExecutor.executeQuery(QueryItemExecutor.java:80)	at org.eclipse.birt.report.engine.executor.TableItemExecutor.execute(TableItemExecutor.java:62)	at org.eclipse.birt.report.engine.internal.executor.wrap.WrappedReportItemExecutor.execute(WrappedReportItemExecutor.java:46)	at org.eclipse.birt.report.engine.internal.executor.emitter.ReportItemEmitterExecutor.execute(ReportItemEmitterExecutor.java:46)	at org.eclipse.birt.report.engine.internal.executor.dup.SuppressDuplicateItemExecutor.execute(SuppressDuplicateItemExecutor.java:43)	at org.eclipse.birt.report.engine.layout.html.HTMLBlockStackingLM.layoutNodes(HTMLBlockStackingLM.java:65)	at org.eclipse.birt.report.engine.layout.html.HTMLPageLM.layout(HTMLPageLM.java:92)	at org.eclipse.birt.report.engine.layout.html.HTMLReportLayoutEngine.layout(HTMLReportLayoutEngine.java:100)	at org.eclipse.birt.report.engine.presentation.ReportDocumentBuilder.build(ReportDocumentBuilder.java:258)	at org.eclipse.birt.report.engine.api.impl.RunTask.doRun(RunTask.java:260)	at org.eclipse.birt.report.engine.api.impl.RunTask.run(RunTask.java:85)	at org.eclipse.birt.report.service.ReportEngineService.runReport(ReportEngineService.java:1317)	at org.eclipse.birt.report.service.BirtViewerReportService.runReport(BirtViewerReportService.java:158)	at org.eclipse.birt.report.service.actionhandler.BirtRunReportActionHandler.__execute(BirtRunReportActionHandler.java:81)	at org.eclipse.birt.report.service.actionhandler.BirtGetPageActionHandler.__checkDocumentExists(BirtGetPageActionHandler.java:58)	at org.eclipse.birt.report.service.actionhandler.AbstractGetPageActionHandler.prepareParameters(AbstractGetPageActionHandler.java:119)	at org.eclipse.birt.report.service.actionhandler.AbstractGetPageActionHandler.__execute(AbstractGetPageActionHandler.java:104)	at org.eclipse.birt.report.service.actionhandler.AbstractBaseActionHandler.execute(AbstractBaseActionHandler.java:90)	at org.eclipse.birt.report.soapengine.processor.AbstractBaseDocumentProcessor.__executeAction(AbstractBaseDocumentProcessor.java:47)	at org.eclipse.birt.report.soapengine.processor.AbstractBaseComponentProcessor.executeAction(AbstractBaseComponentProcessor.java:143)	at org.eclipse.birt.report.soapengine.processor.BirtDocumentProcessor.handleGetPage(BirtDocumentProcessor.java:87)	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:597)	at org.eclipse.birt.report.soapengine.processor.AbstractBaseComponentProcessor.process(AbstractBaseComponentProcessor.java:112)	at org.eclipse.birt.report.soapengine.endpoint.BirtSoapBindingImpl.getUpdatedObjects(BirtSoapBindingImpl.java:66)	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:597)	at org.apache.axis.providers.java.RPCProvider.invokeMethod(RPCProvider.java:397)	at org.apache.axis.providers.java.RPCProvider.processMessage(RPCProvider.java:186)	at org.apache.axis.providers.java.JavaProvider.invoke(JavaProvider.java:323)	at org.apache.axis.strategies.InvocationStrategy.visit(InvocationStrategy.java:32)	at org.apache.axis.SimpleChain.doVisiting(SimpleChain.java:118)	at org.apache.axis.SimpleChain.invoke(SimpleChain.java:83)	at org.apache.axis.handlers.soap.SOAPService.invoke(SOAPService.java:454)	at org.apache.axis.server.AxisServer.invoke(AxisServer.java:281)	at org.apache.axis.transport.http.AxisServlet.doPost(AxisServlet.java:699)	at org.eclipse.birt.report.servlet.BirtSoapMessageDispatcherServlet.doPost(BirtSoapMessageDispatcherServlet.java:265)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)	at org.apache.axis.transport.http.AxisServletBase.service(AxisServletBase.java:327)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)	at org.eclipse.birt.report.servlet.BirtSoapMessageDispatcherServlet.service(BirtSoapMessageDispatcherServlet.java:122)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at org.eclipse.birt.report.filter.ViewerFilter.doFilter(ViewerFilter.java:68)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:235)	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)	at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:183)	at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:95)	at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.process(SecurityContextEstablishmentValve.java:126)	at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:70)	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)	at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158)	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:330)	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:829)	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:598)	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:451)	at java.lang.Thread.run(Thread.java:662)