mailtoakshay

Hi all, Thanks for the replies. Guess I have a work around for the problem. Tried the same and its working. The problem was occuring only when the data to be printed was huge. So, use Synchronization to solve this. Keep the code that calls the jasper as a 'synchronized' block. This should do it.

Hi, Thanks for the reply. We too are using the version 1.2.5 of ireports for jasper. Any idea, if this has got to do with the version? please help me if you are able to find a solution.

Hi, We are using Jasperreports in our application to run reports. When the report has huge data to print, and two users are parallely trying to run the report at around the same time, one user will get the report(sometimes full report, sometimes partial). Another user will get a blank pdf. The server has the following exception generated displayed - java.lang.NullPointerException at com.lowagie.text.pdf.PdfDocument.newPage(PdfDocument.java:814) at com.lowagie.text.pdf.PdfDocument.close(PdfDocument.java:925) at com.lowagie.text.Document.close(Document.java:520) at net.sf.jasperreports.engine.export.JRPdfExporter.exportReportToStream(JRPdfExporter.java:473) at net.sf.jasperreports.engine.export.JRPdfExporter.exportReport(JRPdfExporter.java:260) at com.usdataworks.cw.report.ReportService.generateReportToStream(ReportService.java:286) at com.usdataworks.cw.report.ReportService.generateReportResponse(ReportService.java:211) at com.usdataworks.ice.controller.AdminReportsAction.run(AdminReportsAction.java:198) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:79) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java(Compiled Code)) at java.lang.reflect.Method.invoke(Method.java(Compiled Code)) at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:276) at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:196) at com.usdataworks.cw.security.UsdwAction.execute(UsdwAction.java:80) at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:421) at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:226) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1158) at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:415) at javax.servlet.http.HttpServlet.service(HttpServlet.java:760) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at org.springframework.web.servlet.mvc.ServletWrappingController.handleRequestInternal(ServletWrappingController.java:163) at org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:128) at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:44) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:675) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:623) at org.springframework.web.servlet.FrameworkServlet.serviceWrapper(FrameworkServlet.java:384) at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:353) at javax.servlet.http.HttpServlet.service(HttpServlet.java:760) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at com.ibm.ws.webcontainer.servlet.StrictServletInstance.doService(StrictServletInstance.java:110) at com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet._service(StrictLifecycleServlet.java:174) at com.ibm.ws.webcontainer.servlet.IdleServletState.service(StrictLifecycleServlet.java:313) at com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet.service(StrictLifecycleServlet.java:116) at com.ibm.ws.webcontainer.servlet.ServletInstance.service(ServletInstance.java:283) at com.ibm.ws.webcontainer.servlet.ValidServletReferenceState.dispatch(ValidServletReferenceState.java:42) at com.ibm.ws.webcontainer.servlet.ServletInstanceReference.dispatch(ServletInstanceReference.java:40) at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.handleWebAppDispatch(WebAppRequestDispatcher.java:983) at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.dispatch(WebAppRequestDispatcher.java:564) at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.forward(WebAppRequestDispatcher.java:200) at com.ibm.ws.webcontainer.srt.WebAppInvoker.doForward(WebAppInvoker.java:119) at com.ibm.ws.webcontainer.srt.WebAppInvoker.handleInvocationHook(WebAppInvoker.java:276) at com.ibm.ws.webcontainer.cache.invocation.CachedInvocation.handleInvocation(CachedInvocation.java:71) at com.ibm.ws.webcontainer.cache.invocation.CacheableInvocationContext.invoke(CacheableInvocationContext.java:116) at com.ibm.ws.webcontainer.srp.ServletRequestProcessor.dispatchByURI(ServletRequestProcessor.java:186) at com.ibm.ws.webcontainer.oselistener.OSEListenerDispatcher.service(OSEListener.java:334) at com.ibm.ws.webcontainer.http.HttpConnection.handleRequest(HttpConnection.java:56) at com.ibm.ws.http.HttpConnection.readAndHandleRequest(HttpConnection.java:618) at com.ibm.ws.http.HttpConnection.run(HttpConnection.java:439) at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:672) please help me resolve this issue. Thanks, Akshay