JPEG2000 - RE: Fop Memory Use
While somewhat unrelated, I figure this is the best thread in which to note that there is a known memory leak within JAI when writing handling JPEG2000 images that a third party has fixed in March and documented it here: http://www.jpedal.org/PDFblog/2011/03/java-jai-image-io-jpeg2000-memory- leak-fix/ http://www.jpedal.org/PDFblog/2011/04/jai-memory-leak-source-changes/ They have been unable to commit their change to java-net since the move to Oracle. -Josh From: Eric Douglas [mailto:edoug...@blockhouse.com] Sent: Wednesday, May 18, 2011 1:43 PM To: fop-dev@xmlgraphics.apache.org Subject: RE: Fop Memory Use This test run isn't using SVG at all. The PDFRenderer is working, the PNGRenderer runs out of memory, so it is using images but as output. I already broke up the input to multiple FOs with multiple calls to the transform to generate a large document by combining small documents using the initial-page-number. As the program runs it just keeps increasing memory use. I tried running a profile with Java's VisualVM though I'm not sure what exactly I'm looking at or what to do with it. The number one item showing memory hog in the profiler, as of my last snapshot was: class int[], live bytes 23,273,952 B, live objects 382, generations 10 After the program crashed with the profiler running I had an additional file opened, Java2DRenderer.class, so I'm assuming it's doing something that breaks PNGRenderer. My class doesn't have any int[] references. After that first reference the sizes drop off sharply in the profiler. The next class reference is char[], then org.apache.fop.area.inline.SpaceArea. From: Peter Hancock [mailto:peter.hanc...@gmail.com] Sent: Wednesday, May 18, 2011 12:05 PM To: fop-dev@xmlgraphics.apache.org Subject: Re: Fop Memory Use Hi Eric, Does your document contain many large SVG's? If so take a look at Bugzilla #46360. This issue was resolved in rev 997602 of FOP trunk. Pete On Wed, May 18, 2011 at 5:10 PM, Adrian Cumiskey adrian.cumis...@gmail.com wrote: Hi Eric, Fop calculates layout in page sequence chunks, so try breaking up your pages into chunks of page sequences. Pages should be available for garbage collection once the page sequence has been rendered. Cheers, Adrian. On May 18, 2011, at 7:24 AM, Michael Rubin mru...@thunderhead.com wrote: Just a wild thought. But is there a way you could possibly get the JVM to garbage collect between each run? Maybe that might free the memory up? Thanks. -Mike On 18/05/11 13:20, Eric Douglas wrote: I am using Fop 1.0. I tried using Fop to transform a single document. When I got a little over 100 pages my FO file was over 5 MB. The transform crashed with a Java heap out of memory error. I managed to break the input down, as I'm using embedded code generating the input programmatically, and the PDF output is a lot smaller. So I'm currently transforming 10 pages at a time, setting the initial-page-number to the next sequence (1, 11, 21, etc). Then I save all the generated PDFs in memory and merge them using pdfbox. So far this is working great. I tried to do the same thing with the PNGRenderer, just calling a method to transform 10 pages at a time and save the output images in an array. The PNGRenderer is created locally in the method. It should be getting released when the method ends but the java process never releases any memory. I tested a 90 page report and the memory use was over 1 GB. I tested on another machine where the memory limit is apparently lower and it crashed on page 24. Everything about the method to render to PNG is the same as the method to render to PDF aside from the Renderer. Is there a problem with this renderer or something I could need to do different? Michael Rubin Developer Thunderhead Logo Error! Filename not specified. Error! Filename not specified. T F M E W +44 20 8238 7400 +44 20 8238 7401 mru...@thunderhead.com www.thunderhead.com http://www.thunderhead.com Thunderhead featured in The Sunday Times Profit Track 100 league table of companies with fastest-growing profits. Click here http://www.fasttrack.co.uk/fasttrack/press/pt11-lon.pdf to read more. Error! Filename not specified. http://www.linkedin.com/companies/25033/Thunderhead Error! Filename not specified. http://twitter.com/Thunderheadon Error! Filename not specified. http://www.thunderhead.com/rss/rss.php Error! Filename not specified. http://www.youtube.com/user/ThunderheadOn Error! Filename not specified. http://thunderheadinnovate.wordpress.com/ Error! Filename not specified. http://thunderhead.com/about/careers.php The contents of this e-mail
RE: Fop Memory Use
Appears to be solved. I believe I've found where the memory went. The PNGRenderer needs a lot of memory to transform large documents. If I'm reading this right, from the results of JVisualVM, the memory use is the pixel size. The PNGRender stores every page as an image, which can be retrieved with getPageImage(pageNumber). That image translates to 72 pixels per inch. For an 11 x 8.5 document that's 11 (792) x 8.5 (612) = 484704. It appears the images contain those int[] arrays and use up that amount (484704) x 4 + 16 bytes ( = 1938832) I'm saving those images for print preview and loading them into a GUI window with a zoom. For the zoom I'm just resizing the image with Java's Graphics2D.drawImage. If I redraw that to a larger size it gets a bit blurry. To help reduce that I was sizing the initial image. Fop generates a larger image if I set the methods on the FOUserAgent (setSourceResolution(72), setTargetResolution(144)). Plug that into the same calculation and it quadruples the memory use ((792 * 2 = 1584) * (612 * 2 = 1224)) * 4 + 16 = 7755280 bytes per page. For a 100 page report that's a ton. I am generating my own input (it's a custom report writer) so I know exactly what fits on a page. I'm writing everything with hard page breaks and absolute positioning. I already had a memory problem just trying to create a PDF when I got around 150 pages so I solved that by breaking it up. I now transform all output 10 pages at a time, creating multiple PDFs (in memory) with xsl's initial-page-number then use pdfbox to put the pages together. The FO actually wasn't using much memory, just something Fop was doing when I tried to use that FO to generate a parge PDF all at once. So, I just save my FO files in an array and generate the PNG page images no more than 10 at a time and I've limited memory use! I'm using the PNG to split the process so I can generate output on one machine (server) and display it on another (client). If I only need to transform part of the document, and it's not taking much more than the Graphics2D redraw, I can just call the render again for new page requests so no more fuzzy images. From: Georg Datterl [mailto:georg.datt...@geneon.de] Sent: Thursday, May 19, 2011 12:22 AM To: fop-dev@xmlgraphics.apache.org Subject: AW: Fop Memory Use Hi Eric, That sounds interesting. If you run the transformer for each page and set a breakpoint after the first run, there (IMHO) should not be a reference to any fop object. Ignore the int[]s first, they are used everywhere. Concentrate on the fop objects which should not be there. You could as well run your transformation X times and then investigate all objects which exists exactly X (or Y*X) times in memory. Those are probably accumulated over many runs and crash your application sooner or later. Regards, Georg Datterl -- Kontakt -- Georg Datterl Geneon media solutions gmbh Gutenstetter Straße 8a 90449 Nürnberg HRB Nürnberg: 17193 Geschäftsführer: Yong-Harry Steiert Tel.: 0911/36 78 88 - 26 Fax: 0911/36 78 88 - 20 www.geneon.de Weitere Mitglieder der Willmy MediaGroup: IRS Integrated Realization Services GmbH:www.irs-nbg.de http://www.irs-nbg.de Willmy PrintMedia GmbH: www.willmy.de http://www.willmy.de Willmy Consult Content GmbH: www.willmycc.de http://www.willmycc.de Von: Eric Douglas [mailto:edoug...@blockhouse.com] Gesendet: Mittwoch, 18. Mai 2011 19:43 An: fop-dev@xmlgraphics.apache.org Betreff: RE: Fop Memory Use This test run isn't using SVG at all. The PDFRenderer is working, the PNGRenderer runs out of memory, so it is using images but as output. I already broke up the input to multiple FOs with multiple calls to the transform to generate a large document by combining small documents using the initial-page-number. As the program runs it just keeps increasing memory use. I tried running a profile with Java's VisualVM though I'm not sure what exactly I'm looking at or what to do with it. The number one item showing memory hog in the profiler, as of my last snapshot was: class int[], live bytes 23,273,952 B, live objects 382, generations 10 After the program crashed with the profiler running I had an additional file opened, Java2DRenderer.class, so I'm assuming it's doing something that breaks PNGRenderer. My class doesn't have any int[] references. After that first reference the sizes drop off sharply in the profiler. The next class reference is char[], then org.apache.fop.area.inline.SpaceArea. From: Peter Hancock [mailto:peter.hanc...@gmail.com] Sent: Wednesday, May 18, 2011 12:05 PM To: fop-dev@xmlgraphics.apache.org Subject: Re: Fop Memory Use Hi Eric, Does your document contain many large SVG's? If so take a look at Bugzilla #46360. This issue was resolved in rev 997602 of FOP trunk. Pete
Re: Fop Memory Use
On 20 May 2011, at 20:44, Eric Douglas wrote: Hi Eric snip / The FO actually wasn't using much memory, just something Fop was doing when I tried to use that FO to generate a parge PDF all at once. So, I just save my FO files in an array and generate the PNG page images no more than 10 at a time and I've limited memory use! Good news! Should you feel a need to share some of your experience on FOP's Wiki(*), by all means... ;-) (*) http://wiki.apache.org/xmlgraphics-fop/SuccessStories Thanks! Andreas
Fop Memory Use
I am using Fop 1.0. I tried using Fop to transform a single document. When I got a little over 100 pages my FO file was over 5 MB. The transform crashed with a Java heap out of memory error. I managed to break the input down, as I'm using embedded code generating the input programmatically, and the PDF output is a lot smaller. So I'm currently transforming 10 pages at a time, setting the initial-page-number to the next sequence (1, 11, 21, etc). Then I save all the generated PDFs in memory and merge them using pdfbox. So far this is working great. I tried to do the same thing with the PNGRenderer, just calling a method to transform 10 pages at a time and save the output images in an array. The PNGRenderer is created locally in the method. It should be getting released when the method ends but the java process never releases any memory. I tested a 90 page report and the memory use was over 1 GB. I tested on another machine where the memory limit is apparently lower and it crashed on page 24. Everything about the method to render to PNG is the same as the method to render to PDF aside from the Renderer. Is there a problem with this renderer or something I could need to do different?
Re: Fop Memory Use
Just a wild thought. But is there a way you could possibly get the JVM to garbage collect between each run? Maybe that might free the memory up? Thanks. -Mike On 18/05/11 13:20, Eric Douglas wrote: I am using Fop 1.0. I tried using Fop to transform a single document. When I got a little over 100 pages my FO file was over 5 MB. The transform crashed with a Java heap out of memory error. I managed to break the input down, as I'm using embedded code generating the input programmatically, and the PDF output is a lot smaller. So I'm currently transforming 10 pages at a time, setting the initial-page-number to the next sequence (1, 11, 21, etc). Then I save all the generated PDFs in memory and merge them using pdfbox. So far this is working great. I tried to do the same thing with the PNGRenderer, just calling a method to transform 10 pages at a time and save the output images in an array. The PNGRenderer is created locally in the method. It should be getting released when the method ends but the java process never releases any memory. I tested a 90 page report and the memory use was over 1 GB. I tested on another machine where the memory limit is apparently lower and it crashed on page 24. Everything about the method to render to PNG is the same as the method to render to PDF aside from the Renderer. Is there a problem with this renderer or something I could need to do different? Michael Rubin Developer [http://thunderhead.com/email_signature/images/Thunderhead-logo.png] [http://thunderhead.com/email_signature/images/make-every-communication-count.png] [http://thunderhead.com/email_signature/images/triangles.png] T F M E W +44 20 8238 7400 +44 20 8238 7401 mru...@thunderhead.commailto:mru...@thunderhead.com www.thunderhead.comhttp://www.thunderhead.com Thunderhead featured in The Sunday Times Profit Track 100 league table of companies with fastest-growing profits. Click herehttp://www.fasttrack.co.uk/fasttrack/press/pt11-lon.pdf to read more. [http://thunderhead.com/email_signature/images/linkedin.png]http://www.linkedin.com/companies/25033/Thunderhead [http://thunderhead.com/email_signature/images/twitter.png] http://twitter.com/Thunderheadon [http://thunderhead.com/email_signature/images/rss.png] http://www.thunderhead.com/rss/rss.php [http://thunderhead.com/email_signature/images/youtube.png] http://www.youtube.com/user/ThunderheadOn [http://thunderhead.com/email_signature/images/theblog.png] http://thunderheadinnovate.wordpress.com/ [http://thunderhead.com/email_signature/images/werehiring.png] http://thunderhead.com/about/careers.php The contents of this e-mail are intended for the named addressee only. It contains information that may be confidential. Unless you are the named addressee or an authorized designee, you may not copy or use it, or disclose it to anyone else. If you received it in error please notify us immediately and then destroy it.
RE: Fop Memory Use
I don't know when it does it's automatic garbage collection if that's the only issue. I tried adding the statement to tell it to garbage collect right after calling the method to render to PNG, though I believe I heard that doesn't actually do garbage collection right when that executes. It didn't appear to do anything. I'm running Java 6 Update 24. I tested it straight in Eclipse and even tried debug mode so it takes longer and watched it create a javaw.exe process in task manager which just kept going up on memory use. No matter how slowly I went through the program in debug mode the memory never went down so I expect that means it didn't garbage collect or the PNGRenderer is preventing some garbage from getting collected. The Renderer itself should be created and destroyed in the method that transforms. The transform method looks a lot like the PDFRenderer method which works fine. Why could I not create and save more than a couple dozen pages in PNG when I just tested a 1986 page report to PDF? When I render it to preview I am also rendering it to PDF so I can generate a print preview screen and be able to send to PDF/printer without rerunning it, but when I run a test program to generate 91 page output from Eclipse and watch the java process it creates in the task manager, memory use just generating a PDF got up to 294 MB while the preview got over 1 GB. From: Michael Rubin [mailto:mru...@thunderhead.com] Sent: Wednesday, May 18, 2011 8:24 AM To: fop-dev@xmlgraphics.apache.org Subject: Re: Fop Memory Use Just a wild thought. But is there a way you could possibly get the JVM to garbage collect between each run? Maybe that might free the memory up? Thanks. -Mike On 18/05/11 13:20, Eric Douglas wrote: I am using Fop 1.0. I tried using Fop to transform a single document. When I got a little over 100 pages my FO file was over 5 MB. The transform crashed with a Java heap out of memory error. I managed to break the input down, as I'm using embedded code generating the input programmatically, and the PDF output is a lot smaller. So I'm currently transforming 10 pages at a time, setting the initial-page-number to the next sequence (1, 11, 21, etc). Then I save all the generated PDFs in memory and merge them using pdfbox. So far this is working great. I tried to do the same thing with the PNGRenderer, just calling a method to transform 10 pages at a time and save the output images in an array. The PNGRenderer is created locally in the method. It should be getting released when the method ends but the java process never releases any memory. I tested a 90 page report and the memory use was over 1 GB. I tested on another machine where the memory limit is apparently lower and it crashed on page 24. Everything about the method to render to PNG is the same as the method to render to PDF aside from the Renderer. Is there a problem with this renderer or something I could need to do different? Michael Rubin Developer Thunderhead Logohttp://thunderhead.com/email_signature/images/Thunderhead-logo.png Taglinehttp://thunderhead.com/email_signature/images/make-every-communi cation-count.png Triangleshttp://thunderhead.com/email_signature/images/triangles.png T F M E W +44 20 8238 7400 +44 20 8238 7401 mru...@thunderhead.com www.thunderhead.com http://www.thunderhead.com Thunderhead featured in The Sunday Times Profit Track 100 league table of companies with fastest-growing profits. Click here http://www.fasttrack.co.uk/fasttrack/press/pt11-lon.pdf to read more. LinkedIn http://www.linkedin.com/companies/25033/Thunderhead twitter http://twitter.com/Thunderheadon RSS http://www.thunderhead.com/rss/rss.php YouTube http://www.youtube.com/user/ThunderheadOn http://thunderheadinnovate.wordpress.com/ were-hiring http://thunderhead.com/about/careers.php The contents of this e-mail are intended for the named addressee only. It contains information that may be confidential. Unless you are the named addressee or an authorized designee, you may not copy or use it, or disclose it to anyone else. If you received it in error please notify us immediately and then destroy it.
RE: Fop Memory Use
If there's no obvious answer as to what Fop might be doing wrong or what I might be doing wrong that would be my next guess, except I've never done that so I'd have to figure out how. From: Georg Datterl [mailto:georg.datt...@geneon.de] Sent: Wednesday, May 18, 2011 10:25 AM To: fop-dev@xmlgraphics.apache.org Subject: AW: Fop Memory Use Hi Eric, I'd run a debugger (available with modern JDKs). Set a breakpoint after the first run and memory profiling should tell you, which objects are still in memory and why. Regards, Georg Datterl -- Kontakt -- Georg Datterl Geneon media solutions gmbh Gutenstetter Straße 8a 90449 Nürnberg HRB Nürnberg: 17193 Geschäftsführer: Yong-Harry Steiert Tel.: 0911/36 78 88 - 26 Fax: 0911/36 78 88 - 20 www.geneon.de Weitere Mitglieder der Willmy MediaGroup: IRS Integrated Realization Services GmbH:www.irs-nbg.de http://www.irs-nbg.de Willmy PrintMedia GmbH: www.willmy.de http://www.willmy.de Willmy Consult Content GmbH: www.willmycc.de http://www.willmycc.de Von: Eric Douglas [mailto:edoug...@blockhouse.com] Gesendet: Mittwoch, 18. Mai 2011 16:12 An: fop-dev@xmlgraphics.apache.org Betreff: RE: Fop Memory Use When I tested over 130 pages the PNG render crashed with this dump. Exception in thread main java.lang.OutOfMemoryError: Java heap space at java.lang.AbstractStringBuilder.init(AbstractStringBuilder.java:45) at java.lang.StringBuilder.init(StringBuilder.java:92) at org.apache.fop.area.inline.SpaceArea.init(SpaceArea.java:43) at org.apache.fop.area.inline.TextArea.addSpace(TextArea.java:82) at org.apache.fop.layoutmgr.inline.TextLayoutManager$TextAreaBuilder.addSpaces(TextLayoutManager.java:578) at org.apache.fop.layoutmgr.inline.TextLayoutManager$TextAreaBuilder.setText(TextLayoutManager.java:497) at org.apache.fop.layoutmgr.inline.TextLayoutManager$TextAreaBuilder.build(TextLayoutManager.java:442) at org.apache.fop.layoutmgr.inline.TextLayoutManager$TextAreaBuilder.access$1(TextLayoutManager.java:435) at org.apache.fop.layoutmgr.inline.TextLayoutManager.addAreaInfoAreas(TextLayoutManager.java:369) at org.apache.fop.layoutmgr.inline.TextLayoutManager.addAreas(TextLayoutManager.java:297) at org.apache.fop.layoutmgr.inline.InlineLayoutManager.addAreas(InlineLayoutManager.java:479) at org.apache.fop.layoutmgr.inline.LineLayoutManager.addInlineArea(LineLayoutManager.java:1561) at org.apache.fop.layoutmgr.inline.LineLayoutManager.addAreas(LineLayoutManager.java:1430) at org.apache.fop.layoutmgr.BlockLayoutManager.addAreas(BlockLayoutManager.java:389) at org.apache.fop.layoutmgr.AreaAdditionUtil.addAreas(AreaAdditionUtil.java:121) at org.apache.fop.layoutmgr.BlockContainerLayoutManager$BlockContainerBreaker.addAreas(BlockContainerLayoutManager.java:939) at org.apache.fop.layoutmgr.AbstractBreaker.addAreas(AbstractBreaker.java:626) at org.apache.fop.layoutmgr.AbstractBreaker.addAreas(AbstractBreaker.java:497) at org.apache.fop.layoutmgr.BlockContainerLayoutManager$BlockContainerBreaker.addContainedAreas(BlockContainerLayoutManager.java:965) at org.apache.fop.layoutmgr.BlockContainerLayoutManager.addAreas(BlockContainerLayoutManager.java:1158) at org.apache.fop.layoutmgr.BlockLayoutManager.addAreas(BlockLayoutManager.java:389) at org.apache.fop.layoutmgr.AreaAdditionUtil.addAreas(AreaAdditionUtil.java:121) at org.apache.fop.layoutmgr.FlowLayoutManager.addAreas(FlowLayoutManager.java:342) at org.apache.fop.layoutmgr.PageBreaker.addAreas(PageBreaker.java:280) at org.apache.fop.layoutmgr.AbstractBreaker.addAreas(AbstractBreaker.java:626) at org.apache.fop.layoutmgr.AbstractBreaker.addAreas(AbstractBreaker.java:497) at org.apache.fop.layoutmgr.PageBreaker.doPhase3(PageBreaker.java:308) at org.apache.fop.layoutmgr.AbstractBreaker.doLayout(AbstractBreaker.java:450) at org.apache.fop.layoutmgr.PageBreaker.doLayout(PageBreaker.java:85) at org.apache.fop.layoutmgr.PageSequenceLayoutManager.activateLayout(PageSequenceLayoutManager.java:107) at org.apache.fop.area.AreaTreeHandler.endPageSequence(AreaTreeHandler.java:238) at org.apache.fop.fo.pagination.PageSequence.endOfNode(PageSequence.java:120)
AW: Fop Memory Use
Hi Eric, On a windows system it's quite straight-forward. Run your application in your IDE. Stop at breakpoint. Run VisualVM. You will get a list of running java processes, including your application. A few clicks will get you a memory profile and there you can see a tree structure, where each object in memory references it's parent. There's probably one single root object you have to free to solve your memory issues. Regards, Georg Datterl -- Kontakt -- Georg Datterl Geneon media solutions gmbh Gutenstetter Straße 8a 90449 Nürnberg HRB Nürnberg: 17193 Geschäftsführer: Yong-Harry Steiert Tel.: 0911/36 78 88 - 26 Fax: 0911/36 78 88 - 20 www.geneon.dehttp://www.geneon.de Weitere Mitglieder der Willmy MediaGroup: IRS Integrated Realization Services GmbH: www.irs-nbg.dehttp://www.irs-nbg.de Willmy PrintMedia GmbH: www.willmy.dehttp://www.willmy.de Willmy Consult Content GmbH: www.willmycc.dehttp://www.willmycc.de Von: Eric Douglas [mailto:edoug...@blockhouse.com] Gesendet: Mittwoch, 18. Mai 2011 16:43 An: fop-dev@xmlgraphics.apache.org Betreff: RE: Fop Memory Use If there's no obvious answer as to what Fop might be doing wrong or what I might be doing wrong that would be my next guess, except I've never done that so I'd have to figure out how. From: Georg Datterl [mailto:georg.datt...@geneon.de] Sent: Wednesday, May 18, 2011 10:25 AM To: fop-dev@xmlgraphics.apache.org Subject: AW: Fop Memory Use Hi Eric, I'd run a debugger (available with modern JDKs). Set a breakpoint after the first run and memory profiling should tell you, which objects are still in memory and why. Regards, Georg Datterl -- Kontakt -- Georg Datterl Geneon media solutions gmbh Gutenstetter Straße 8a 90449 Nürnberg HRB Nürnberg: 17193 Geschäftsführer: Yong-Harry Steiert Tel.: 0911/36 78 88 - 26 Fax: 0911/36 78 88 - 20 www.geneon.dehttp://www.geneon.de Weitere Mitglieder der Willmy MediaGroup: IRS Integrated Realization Services GmbH: www.irs-nbg.dehttp://www.irs-nbg.de Willmy PrintMedia GmbH: www.willmy.dehttp://www.willmy.de Willmy Consult Content GmbH: www.willmycc.dehttp://www.willmycc.de Von: Eric Douglas [mailto:edoug...@blockhouse.com] Gesendet: Mittwoch, 18. Mai 2011 16:12 An: fop-dev@xmlgraphics.apache.org Betreff: RE: Fop Memory Use When I tested over 130 pages the PNG render crashed with this dump. Exception in thread main java.lang.OutOfMemoryError: Java heap space at java.lang.AbstractStringBuilder.init(AbstractStringBuilder.java:45) at java.lang.StringBuilder.init(StringBuilder.java:92) at org.apache.fop.area.inline.SpaceArea.init(SpaceArea.java:43) at org.apache.fop.area.inline.TextArea.addSpace(TextArea.java:82) at org.apache.fop.layoutmgr.inline.TextLayoutManager$TextAreaBuilder.addSpaces(TextLayoutManager.java:578) at org.apache.fop.layoutmgr.inline.TextLayoutManager$TextAreaBuilder.setText(TextLayoutManager.java:497) at org.apache.fop.layoutmgr.inline.TextLayoutManager$TextAreaBuilder.build(TextLayoutManager.java:442) at org.apache.fop.layoutmgr.inline.TextLayoutManager$TextAreaBuilder.access$1(TextLayoutManager.java:435) at org.apache.fop.layoutmgr.inline.TextLayoutManager.addAreaInfoAreas(TextLayoutManager.java:369) at org.apache.fop.layoutmgr.inline.TextLayoutManager.addAreas(TextLayoutManager.java:297) at org.apache.fop.layoutmgr.inline.InlineLayoutManager.addAreas(InlineLayoutManager.java:479) at org.apache.fop.layoutmgr.inline.LineLayoutManager.addInlineArea(LineLayoutManager.java:1561) at org.apache.fop.layoutmgr.inline.LineLayoutManager.addAreas(LineLayoutManager.java:1430) at org.apache.fop.layoutmgr.BlockLayoutManager.addAreas(BlockLayoutManager.java:389) at org.apache.fop.layoutmgr.AreaAdditionUtil.addAreas(AreaAdditionUtil.java:121) at org.apache.fop.layoutmgr.BlockContainerLayoutManager$BlockContainerBreaker.addAreas(BlockContainerLayoutManager.java:939) at org.apache.fop.layoutmgr.AbstractBreaker.addAreas(AbstractBreaker.java:626) at org.apache.fop.layoutmgr.AbstractBreaker.addAreas(AbstractBreaker.java:497) at org.apache.fop.layoutmgr.BlockContainerLayoutManager$BlockContainerBreaker.addContainedAreas(BlockContainerLayoutManager.java:965) at org.apache.fop.layoutmgr.BlockContainerLayoutManager.addAreas(BlockContainerLayoutManager.java:1158) at org.apache.fop.layoutmgr.BlockLayoutManager.addAreas(BlockLayoutManager.java:389) at org.apache.fop.layoutmgr.AreaAdditionUtil.addAreas(AreaAdditionUtil.java:121) at org.apache.fop.layoutmgr.FlowLayoutManager.addAreas(FlowLayoutManager.java:342) at org.apache.fop.layoutmgr.PageBreaker.addAreas(PageBreaker.java:280) at org.apache.fop.layoutmgr.AbstractBreaker.addAreas(AbstractBreaker.java:626) at org.apache.fop.layoutmgr.AbstractBreaker.addAreas(AbstractBreaker.java:497) at org.apache.fop.layoutmgr.PageBreaker.doPhase3(PageBreaker.java:308
Re: Fop Memory Use
Hi Eric, Fop calculates layout in page sequence chunks, so try breaking up your pages into chunks of page sequences. Pages should be available for garbage collection once the page sequence has been rendered. Cheers, Adrian. On May 18, 2011, at 7:24 AM, Michael Rubin mru...@thunderhead.com wrote: Just a wild thought. But is there a way you could possibly get the JVM to garbage collect between each run? Maybe that might free the memory up? Thanks. -Mike On 18/05/11 13:20, Eric Douglas wrote: I am using Fop 1.0. I tried using Fop to transform a single document. When I got a little over 100 pages my FO file was over 5 MB. The transform crashed with a Java heap out of memory error. I managed to break the input down, as I'm using embedded code generating the input programmatically, and the PDF output is a lot smaller. So I'm currently transforming 10 pages at a time, setting the initial-page-number to the next sequence (1, 11, 21, etc). Then I save all the generated PDFs in memory and merge them using pdfbox. So far this is working great. I tried to do the same thing with the PNGRenderer, just calling a method to transform 10 pages at a time and save the output images in an array. The PNGRenderer is created locally in the method. It should be getting released when the method ends but the java process never releases any memory. I tested a 90 page report and the memory use was over 1 GB. I tested on another machine where the memory limit is apparently lower and it crashed on page 24. Everything about the method to render to PNG is the same as the method to render to PDF aside from the Renderer. Is there a problem with this renderer or something I could need to do different? Michael Rubin Developer T F M E W +44 20 8238 7400 +44 20 8238 7401 mru...@thunderhead.com www.thunderhead.com Thunderhead featured in The Sunday Times Profit Track 100 league table of companies with fastest-growing profits. Click here toread more. The contents of this e-mail are intended for the named addressee only. It contains information that may be confidential. Unless you are the named addressee or an authorized designee, you may not copy or use it, or disclose it to anyone else. If you received it in error please notify us immediately and then destroy it.
Re: Fop Memory Use
Hi Eric, Does your document contain many large SVG's? If so take a look at Bugzilla #46360. This issue was resolved in rev 997602 of FOP trunk. Pete On Wed, May 18, 2011 at 5:10 PM, Adrian Cumiskey adrian.cumis...@gmail.comwrote: Hi Eric, Fop calculates layout in page sequence chunks, so try breaking up your pages into chunks of page sequences. Pages should be available for garbage collection once the page sequence has been rendered. Cheers, Adrian. On May 18, 2011, at 7:24 AM, Michael Rubin mru...@thunderhead.com wrote: Just a wild thought. But is there a way you could possibly get the JVM to garbage collect between each run? Maybe that might free the memory up? Thanks. -Mike On 18/05/11 13:20, Eric Douglas wrote: I am using Fop 1.0. I tried using Fop to transform a single document. When I got a little over 100 pages my FO file was over 5 MB. The transform crashed with a Java heap out of memory error. I managed to break the input down, as I'm using embedded code generating the input programmatically, and the PDF output is a lot smaller. So I'm currently transforming 10 pages at a time, setting the initial-page-number to the next sequence (1, 11, 21, etc). Then I save all the generated PDFs in memory and merge them using pdfbox. So far this is working great. I tried to do the same thing with the PNGRenderer, just calling a method to transform 10 pages at a time and save the output images in an array. The PNGRenderer is created locally in the method. It should be getting released when the method ends but the java process never releases any memory. I tested a 90 page report and the memory use was over 1 GB. I tested on another machine where the memory limit is apparently lower and it crashed on page 24. Everything about the method to render to PNG is the same as the method to render to PDF aside from the Renderer. Is there a problem with this renderer or something I could need to do different? *Michael Rubin* Developer [image: Thunderhead Logo] [image: Tagline] [image: Triangles] *T* *F* *M* *E* *W* +44 20 8238 7400 +44 20 8238 7401 mru...@thunderhead.commru...@thunderhead.com www.thunderhead.com Thunderhead featured in The Sunday Times Profit Track 100 league table of companies with fastest-growing profits. Click herehttp://www.fasttrack.co.uk/fasttrack/press/pt11-lon.pdfto read more. [image: LinkedIn] http://www.linkedin.com/companies/25033/Thunderhead [image: twitter] http://twitter.com/Thunderheadon[image: RSS]http://www.thunderhead.com/rss/rss.php[image: YouTube] http://www.youtube.com/user/ThunderheadOnhttp://thunderheadinnovate.wordpress.com/ [image: were-hiring] http://thunderhead.com/about/careers.php The contents of this e-mail are intended for the named addressee only. It contains information that may be confidential. Unless you are the named addressee or an authorized designee, you may not copy or use it, or disclose it to anyone else. If you received it in error please notify us immediately and then destroy it.
RE: Fop Memory Use
This test run isn't using SVG at all. The PDFRenderer is working, the PNGRenderer runs out of memory, so it is using images but as output. I already broke up the input to multiple FOs with multiple calls to the transform to generate a large document by combining small documents using the initial-page-number. As the program runs it just keeps increasing memory use. I tried running a profile with Java's VisualVM though I'm not sure what exactly I'm looking at or what to do with it. The number one item showing memory hog in the profiler, as of my last snapshot was: class int[], live bytes 23,273,952 B, live objects 382, generations 10 After the program crashed with the profiler running I had an additional file opened, Java2DRenderer.class, so I'm assuming it's doing something that breaks PNGRenderer. My class doesn't have any int[] references. After that first reference the sizes drop off sharply in the profiler. The next class reference is char[], then org.apache.fop.area.inline.SpaceArea. From: Peter Hancock [mailto:peter.hanc...@gmail.com] Sent: Wednesday, May 18, 2011 12:05 PM To: fop-dev@xmlgraphics.apache.org Subject: Re: Fop Memory Use Hi Eric, Does your document contain many large SVG's? If so take a look at Bugzilla #46360. This issue was resolved in rev 997602 of FOP trunk. Pete On Wed, May 18, 2011 at 5:10 PM, Adrian Cumiskey adrian.cumis...@gmail.com wrote: Hi Eric, Fop calculates layout in page sequence chunks, so try breaking up your pages into chunks of page sequences. Pages should be available for garbage collection once the page sequence has been rendered. Cheers, Adrian. On May 18, 2011, at 7:24 AM, Michael Rubin mru...@thunderhead.com wrote: Just a wild thought. But is there a way you could possibly get the JVM to garbage collect between each run? Maybe that might free the memory up? Thanks. -Mike On 18/05/11 13:20, Eric Douglas wrote: I am using Fop 1.0. I tried using Fop to transform a single document. When I got a little over 100 pages my FO file was over 5 MB. The transform crashed with a Java heap out of memory error. I managed to break the input down, as I'm using embedded code generating the input programmatically, and the PDF output is a lot smaller. So I'm currently transforming 10 pages at a time, setting the initial-page-number to the next sequence (1, 11, 21, etc). Then I save all the generated PDFs in memory and merge them using pdfbox. So far this is working great. I tried to do the same thing with the PNGRenderer, just calling a method to transform 10 pages at a time and save the output images in an array. The PNGRenderer is created locally in the method. It should be getting released when the method ends but the java process never releases any memory. I tested a 90 page report and the memory use was over 1 GB. I tested on another machine where the memory limit is apparently lower and it crashed on page 24. Everything about the method to render to PNG is the same as the method to render to PDF aside from the Renderer. Is there a problem with this renderer or something I could need to do different? Michael Rubin Developer Thunderhead Logo Tagline Triangles T F M E W +44 20 8238 7400 +44 20 8238 7401 mailto:mru...@thunderhead.com mru...@thunderhead.com www.thunderhead.com http://www.thunderhead.com Thunderhead featured in The Sunday Times Profit Track 100 league table of companies with fastest-growing profits. Click here http://www.fasttrack.co.uk/fasttrack/press/pt11-lon.pdf to read more. LinkedIn http://www.linkedin.com/companies/25033/Thunderhead twitter http://twitter.com/Thunderheadon RSS http://www.thunderhead.com/rss/rss.php YouTube http://www.youtube.com/user/ThunderheadOn http://thunderheadinnovate.wordpress.com/ were-hiring http://thunderhead.com/about/careers.php The contents of this e-mail are intended for the named addressee only. It contains information that may be confidential. Unless you are the named addressee or an authorized designee, you may not copy or use it, or disclose it to anyone else. If you received it in error please notify us immediately and then destroy it.
RE: Fop Memory Use
What I could find on int[] references seems to be... org.apache.fop.render.pdf.PDFRenderer extends AbstractPathOrientedRenderer implements PDFConfigurationConstants org.apache.fop.render.bitmap.PNGRenderer extends Java2DRenderer org.apache.fop.render.java2d.Java2DRenderer extends AbstractPathOrientedRenderer implements Printable int[] references: public static void renderText(TextArea text, Graphics2D g2d, Font font) private static int[] getGlyphOffsets(String s, Font font, TextArea text, int[] letterAdjust) Could this be because I'm loading in custom fonts? Is this a bug in the Java2DRenderer? A simple workaround? From: Peter Hancock [mailto:peter.hanc...@gmail.com] Sent: Wednesday, May 18, 2011 12:05 PM To: fop-dev@xmlgraphics.apache.org Subject: Re: Fop Memory Use Hi Eric, Does your document contain many large SVG's? If so take a look at Bugzilla #46360. This issue was resolved in rev 997602 of FOP trunk. Pete On Wed, May 18, 2011 at 5:10 PM, Adrian Cumiskey adrian.cumis...@gmail.com wrote: Hi Eric, Fop calculates layout in page sequence chunks, so try breaking up your pages into chunks of page sequences. Pages should be available for garbage collection once the page sequence has been rendered. Cheers, Adrian. On May 18, 2011, at 7:24 AM, Michael Rubin mru...@thunderhead.com wrote: Just a wild thought. But is there a way you could possibly get the JVM to garbage collect between each run? Maybe that might free the memory up? Thanks. -Mike On 18/05/11 13:20, Eric Douglas wrote: I am using Fop 1.0. I tried using Fop to transform a single document. When I got a little over 100 pages my FO file was over 5 MB. The transform crashed with a Java heap out of memory error. I managed to break the input down, as I'm using embedded code generating the input programmatically, and the PDF output is a lot smaller. So I'm currently transforming 10 pages at a time, setting the initial-page-number to the next sequence (1, 11, 21, etc). Then I save all the generated PDFs in memory and merge them using pdfbox. So far this is working great. I tried to do the same thing with the PNGRenderer, just calling a method to transform 10 pages at a time and save the output images in an array. The PNGRenderer is created locally in the method. It should be getting released when the method ends but the java process never releases any memory. I tested a 90 page report and the memory use was over 1 GB. I tested on another machine where the memory limit is apparently lower and it crashed on page 24. Everything about the method to render to PNG is the same as the method to render to PDF aside from the Renderer. Is there a problem with this renderer or something I could need to do different? Michael Rubin Developer Thunderhead Logo Tagline Triangles T F M E W +44 20 8238 7400 +44 20 8238 7401 mailto:mru...@thunderhead.com mru...@thunderhead.com www.thunderhead.com http://www.thunderhead.com Thunderhead featured in The Sunday Times Profit Track 100 league table of companies with fastest-growing profits. Click here http://www.fasttrack.co.uk/fasttrack/press/pt11-lon.pdf to read more. LinkedIn http://www.linkedin.com/companies/25033/Thunderhead twitter http://twitter.com/Thunderheadon RSS http://www.thunderhead.com/rss/rss.php YouTube http://www.youtube.com/user/ThunderheadOn http://thunderheadinnovate.wordpress.com/ were-hiring http://thunderhead.com/about/careers.php The contents of this e-mail are intended for the named addressee only. It contains information that may be confidential. Unless you are the named addressee or an authorized designee, you may not copy or use it, or disclose it to anyone else. If you received it in error please notify us immediately and then destroy it.
AW: Fop Memory Use
Hi Eric, That sounds interesting. If you run the transformer for each page and set a breakpoint after the first run, there (IMHO) should not be a reference to any fop object. Ignore the int[]s first, they are used everywhere. Concentrate on the fop objects which should not be there. You could as well run your transformation X times and then investigate all objects which exists exactly X (or Y*X) times in memory. Those are probably accumulated over many runs and crash your application sooner or later. Regards, Georg Datterl -- Kontakt -- Georg Datterl Geneon media solutions gmbh Gutenstetter Straße 8a 90449 Nürnberg HRB Nürnberg: 17193 Geschäftsführer: Yong-Harry Steiert Tel.: 0911/36 78 88 - 26 Fax: 0911/36 78 88 - 20 www.geneon.dehttp://www.geneon.de Weitere Mitglieder der Willmy MediaGroup: IRS Integrated Realization Services GmbH: www.irs-nbg.dehttp://www.irs-nbg.de Willmy PrintMedia GmbH: www.willmy.dehttp://www.willmy.de Willmy Consult Content GmbH: www.willmycc.dehttp://www.willmycc.de Von: Eric Douglas [mailto:edoug...@blockhouse.com] Gesendet: Mittwoch, 18. Mai 2011 19:43 An: fop-dev@xmlgraphics.apache.org Betreff: RE: Fop Memory Use This test run isn't using SVG at all. The PDFRenderer is working, the PNGRenderer runs out of memory, so it is using images but as output. I already broke up the input to multiple FOs with multiple calls to the transform to generate a large document by combining small documents using the initial-page-number. As the program runs it just keeps increasing memory use. I tried running a profile with Java's VisualVM though I'm not sure what exactly I'm looking at or what to do with it. The number one item showing memory hog in the profiler, as of my last snapshot was: class int[], live bytes 23,273,952 B, live objects 382, generations 10 After the program crashed with the profiler running I had an additional file opened, Java2DRenderer.class, so I'm assuming it's doing something that breaks PNGRenderer. My class doesn't have any int[] references. After that first reference the sizes drop off sharply in the profiler. The next class reference is char[], then org.apache.fop.area.inline.SpaceArea. From: Peter Hancock [mailto:peter.hanc...@gmail.com] Sent: Wednesday, May 18, 2011 12:05 PM To: fop-dev@xmlgraphics.apache.org Subject: Re: Fop Memory Use Hi Eric, Does your document contain many large SVG's? If so take a look at Bugzilla #46360. This issue was resolved in rev 997602 of FOP trunk. Pete On Wed, May 18, 2011 at 5:10 PM, Adrian Cumiskey adrian.cumis...@gmail.commailto:adrian.cumis...@gmail.com wrote: Hi Eric, Fop calculates layout in page sequence chunks, so try breaking up your pages into chunks of page sequences. Pages should be available for garbage collection once the page sequence has been rendered. Cheers, Adrian. On May 18, 2011, at 7:24 AM, Michael Rubin mru...@thunderhead.commailto:mru...@thunderhead.com wrote: Just a wild thought. But is there a way you could possibly get the JVM to garbage collect between each run? Maybe that might free the memory up? Thanks. -Mike On 18/05/11 13:20, Eric Douglas wrote: I am using Fop 1.0. I tried using Fop to transform a single document. When I got a little over 100 pages my FO file was over 5 MB. The transform crashed with a Java heap out of memory error. I managed to break the input down, as I'm using embedded code generating the input programmatically, and the PDF output is a lot smaller. So I'm currently transforming 10 pages at a time, setting the initial-page-number to the next sequence (1, 11, 21, etc). Then I save all the generated PDFs in memory and merge them using pdfbox. So far this is working great. I tried to do the same thing with the PNGRenderer, just calling a method to transform 10 pages at a time and save the output images in an array. The PNGRenderer is created locally in the method. It should be getting released when the method ends but the java process never releases any memory. I tested a 90 page report and the memory use was over 1 GB. I tested on another machine where the memory limit is apparently lower and it crashed on page 24. Everything about the method to render to PNG is the same as the method to render to PDF aside from the Renderer. Is there a problem with this renderer or something I could need to do different? Michael Rubin Developer Fehler! Es wurde kein Dateiname angegeben. Fehler! Es wurde kein Dateiname angegeben. T F M E W +44 20 8238 7400 +44 20 8238 7401 mru...@thunderhead.commailto:mru...@thunderhead.com www.thunderhead.comhttp://www.thunderhead.com Thunderhead featured in The Sunday Times Profit Track 100 league table of companies with fastest-growing profits. Click herehttp://www.fasttrack.co.uk/fasttrack/press/pt11-lon.pdf to read more. Fehler! Es wurde kein Dateiname angegeben.http