Getting IllegalThreadStateException, while exporting the report to PDF

Question

Hi Friends,
I am using JRC to create report in PDF format.
But intermitently I get java.lang.IllegalThreadStateException while trying to export ReportClientDocument into PDF format using the PrintOutPutContrller.
The I am using for this is
ExportOptions exportoptions = new ExportOptions();
PDFExportFormatOptions pdfOptions = new PDFExportFormatOptions();
exportoptions.setExportFormatType(ReportExportFormat.PDF);
exportoptions.setFormatOptions(pdfOptions);
reportInputStream = reportClientDocument.getPrintOutputController().export(exportoptions);
The exception I get is:
com.crystaldecisions.sdk.occa.report.lib.ReportSDKException: java.lang.IllegalThreadStateException---- Error code:-2147467259 Error code name:failed
at com.crystaldecisions.sdk.occa.report.application.PrintOutputController.if(Unknown Source)
at com.crystaldecisions.sdk.occa.report.application.PrintOutputController.export(Unknown Source)
at com.crystaldecisions.sdk.occa.report.application.PrintOutputController.export(Unknown Source)
at com.solidcore.as.report.ReportJob.createPDFReport(ReportJob.java:114)
at com.solidcore.as.report.ReportJob.execute(ReportJob.java:66)
at org.quartz.core.JobRunShell.run(JobRunShell.java:202)
at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:525)
I am using JRC that comes with CR4E 2.0. The Report is designed using Crystal Report 2008.
Please help me in solving the issue.
Thank you,
Deepak

Answer 1

Hi Ted,
Thank you for the answers.
In our applications the Report will be generated in two ways.
1. A user clicks on a link on web, and the report is generated in PDF format and sent via http.
            At present we are creating a new
            ReportClientDocument for every request and using ExportControl.processHttpRequest() API
            the report in PDF format is sent user through response.
2. Quartz schuduler trigger a job, whose work is to generate Report in PDF format into a file, and the
          generated pdf file is sent to users via mail.
          Here I user ReportCLientDocument.export() API to get the InputStream and use the input stream
          to create PDF file.
It is possible that a user is requesting a report on Web Page and the same report is being generated by Scheduler at the same time. But in each case a separate ReportClientDocument is being used.Since Report containse a huge data, and it takes time to generate PDF file so, it is possible that a given RPT file is opened by two spearate ReportClientDocuemnt (one via web user and other via Scheduler) at the same time.
The have got rid of my earlier exceptions by sycncronizing the ReportClientDocuent.export() API.
But now am getting following exception intermittently.
2009-05-01 16:47:45.859 GMT+05:30 [ERROR] [ReportJob.java:137] [AnalyticsScheduler_Worker-10(34)] - [] Could not generate the Report.
java.lang.NullPointerException
     at com.crystaldecisions.sdk.occa.report.application.ds.a(Unknown Source)
     at com.crystaldecisions.sdk.occa.report.application.ReportSource.a(Unknown Source)
     at com.crystaldecisions.sdk.occa.report.application.ReportSource.a(Unknown Source)
     at com.crystaldecisions.sdk.occa.report.application.PrintOutputController.if(Unknown Source)
     at com.crystaldecisions.sdk.occa.report.application.PrintOutputController.export(Unknown Source)
     at com.crystaldecisions.sdk.occa.report.application.PrintOutputController.export(Unknown Source)
     at com.solidcore.as.report.ReportJob.createPDFReport(ReportJob.java:123)
     at com.solidcore.as.report.ReportJob.execute(ReportJob.java:75)
     at org.quartz.core.JobRunShell.run(JobRunShell.java:202)
     at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:525)
2009-05-01 16:47:45.859 GMT+05:30 [ERROR] [JobRunShell.java:211] [AnalyticsScheduler_Worker-10] - Job reportJobGroup.reportJob threw an unhandled Exception:
java.lang.NullPointerException
     at com.crystaldecisions.sdk.occa.report.application.ReportClientDocument.if(Unknown Source)
     at com.crystaldecisions.sdk.occa.report.application.ReportClientDocument.case(Unknown Source)
     at com.crystaldecisions.sdk.occa.report.application.ClientDocument.close(Unknown Source)
     at com.crystaldecisions.sdk.occa.report.application.ReportClientDocument.close(Unknown Source)
     at com.solidcore.as.report.ReportJob.createPDFReport(ReportJob.java:155)
     at com.solidcore.as.report.ReportJob.execute(ReportJob.java:75)
     at org.quartz.core.JobRunShell.run(JobRunShell.java:202)
     at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:525)
Edited by: Deepak Mishra on May 4, 2009 5:47 PM