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Struts & Hibernate
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| | | Subject: Re: Out of memory when concatenating -- I have read the previous threads | Subject: Re: Out of memory when concatenating -- I have read the previous threads 2007-10-08 - By Paulo Soares
Back
Instead of using a FileInputStream, use just the file name in the
PdfReader constructor. It shouldn't make a difference but who knows?
Paulo
> -- --Original Message-- --
> From: itext-questions-bounces@(protected)
> [mailto:itext-questions-bounces@(protected)] On
> Behalf Of dhyton
> Sent: Monday, October 08, 2007 3:55 PM
> To: itext-questions@(protected)
> Subject: Re: [iText-questions] Out of memory when
> concatenating -- I have read the previous threads
>
>
> I realize that some memory must be maintained for references for page
> addresses and so on. Still, in my case my pdf is about 72k
> (3 pages) and
> the memory is growing by about 80k per PDF iteration. To me that would
> indicate the entire pdf is being held in memory. I have
> tested with both
> checking the free memory in runtime and using JProfiler.
>
> I know the api and forum indicate this is not so, my testing
> would indicate
> otherwise, and I have to resolve this issue one way or
> another because this
> issue is critical to our application.
>
>
>
> Paulo Soares wrote:
> >
> > You'll have to throw more memory at the jvm. More pages require more
> > memory
> > even if all that it's kept in memory is references to the
> page addresses.
> >
> > Paulo
> >
> > -- -- Original Message -- --
> > From: "dhyton" <dhyton@(protected)>
> > To: <itext-questions@(protected)>
> > Sent: Friday, October 05, 2007 6:36 PM
> > Subject: [iText-questions] Out of memory when concatenating
> -- I have read
> > the previous threads
> >
> >
> >>
> >> I am having a problem with running out of memory when concatenating
> >> files.
> >> I
> >> did search the issues and have found no solution. Below
> is my code. The
> >> output steam that is passed into the method for testing is a
> >> FileOutputStream. I am currently using itext 1.3 but I
> tested and had the
> >> same issue with the latest release. You can see I use a
> PDFCopy and do
> >> not
> >> keep any references to the reader around.
> >>
> >> The heap seems to grow very quickly.
> >>
> >> Can you please help?
> >> Thanks
> >> David
> >>
> >> public static void assembleOnLargePDF(Rectangle
> pageSize, OutputStream
> >> sos, File jobDir, boolean paper, boolean preview, List<String>
> >> householdIDs)
> >> throws DocumentException, IOException
> >> {
> >>
> >> Runtime runtime = Runtime.getRuntime();
> >> System.gc();
> >>
> >> System.out.println("Starting Process " +
> runtime.freeMemory() + "
> >> of
> >> " + runtime.maxMemory());
> >> Document allHHDocument = new Document(pageSize, 0, 0, 0, 0);
> >> PdfCopy allHHCopy = new PdfCopy(allHHDocument, sos);
> >>
> >> allHHDocument.open();
> >> int count = 0;
> >> for(String householdID : householdIDs)
> >> {
> >> System.gc();
> >> System.out.println("Starting HH " + (count) + " " +
> >> runtime.freeMemory());
> >>
> >> FileInputStream fileInputStream;
> >> try
> >> {
> >> File file = new File(jobDir, householdID + ".pdf");
> >> if(file.exists()) fileInputStream = new
> >> FileInputStream(file);
> >> else continue;
> >> }
> >> catch(FileNotFoundException e)
> >> {
> >> continue;
> >> }
> >> PdfReader r = null;
> >> try
> >> {
> >> r = new PdfReader(fileInputStream);
> >> int numberOfPages = r.getNumberOfPages();
> >> for(int j = 1; j <= numberOfPages; j++)
> >> {
> >>
> allHHCopy.addPage(allHHCopy.getImportedPage(r, j));
> >>
> >> }
> >>
> >> allHHCopy.freeReader(r);
> >>
> >> sos.flush();
> >> }
> >> finally
> >> {
> >> if(r != null)
> >> r.close();
> >> fileInputStream.close();
> >> }
> >> System.gc();
> >>
> >> System.out.println("Ending HH " + (count++) + " " +
> >> runtime.freeMemory());
> >> }
> >> allHHDocument.close();
> >> allHHCopy.close();
> >> System.gc();
> >> System.out.println("Ending Process " +
> runtime.freeMemory());
> >>
> >> }
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