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https://issues.apache.org/jira/browse/PDFBOX-4718?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17886732#comment-17886732
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Andreas Lehmkühler commented on PDFBOX-4718:
--------------------------------------------
i've found a workaround so that the attached pdf is rendered in about 4-5
seconds
Some details:
* I've calculated an intersected overall bound box from all clipping paths
* the overall bounding box is used a starting point for the calculation of the
intersected clipping path. This could decrease the complexity in some cases, so
that the call of Area.intersect needs less resources/time to calculate
* clipping paths which represent a rectangular are skipped as they were already
taken into account when calculation the intersected overall bound box
> OutOfMemoryError - during renderImageWithDPI
> --------------------------------------------
>
> Key: PDFBOX-4718
> URL: https://issues.apache.org/jira/browse/PDFBOX-4718
> Project: PDFBox
> Issue Type: Bug
> Components: Rendering
> Affects Versions: 2.0.12, 2.0.17
> Environment: macOS Mojave (10.14.6)
> Java 11.0.2 -Xmx10G -Xms10G
> Reporter: Serhii Kolesnyk
> Assignee: Andreas Lehmkühler
> Priority: Blocker
> Fix For: 4.0.0
>
> Attachments: PDFBOX-4718-reduced.pdf, PDFBox4718Intersect.java,
> example.pdf, image-2019-12-19-05-55-57-648.png
>
>
> During rendering pdf we receive _java.lang.OutOfMemoryError: Java heap space_
> {code:java}
> Exception in thread "AWT-Shutdown" java.lang.OutOfMemoryError: Java heap
> spaceException in thread "AWT-Shutdown" java.lang.OutOfMemoryError: Java heap
> space at java.desktop/sun.awt.AppContext.getAppContexts(AppContext.java:167)
> at
> java.desktop/sun.awt.AppContext.stopEventDispatchThreads(AppContext.java:610)
> at java.desktop/sun.awt.AWTAutoShutdown.run(AWTAutoShutdown.java:322) at
> java.base/java.lang.Thread.run(Thread.java:834)
> java.lang.OutOfMemoryError: Java heap space
> at java.desktop/sun.awt.geom.AreaOp.pruneEdges(AreaOp.java:362) at
> java.desktop/sun.awt.geom.AreaOp.calculate(AreaOp.java:159) at
> java.desktop/java.awt.geom.Area.intersect(Area.java:293) at
> org.apache.pdfbox.pdmodel.graphics.state.PDGraphicsState.intersectClippingPath(PDGraphicsState.java:618)
> at
> org.apache.pdfbox.pdmodel.graphics.state.PDGraphicsState.intersectClippingPath(PDGraphicsState.java:597)
> at org.apache.pdfbox.rendering.PageDrawer.endPath(PageDrawer.java:936) at
> org.apache.pdfbox.contentstream.operator.graphics.EndPath.process(EndPath.java:35)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processOperator(PDFStreamEngine.java:869)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processStreamOperators(PDFStreamEngine.java:505)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processStream(PDFStreamEngine.java:479)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processPage(PDFStreamEngine.java:152)
> at org.apache.pdfbox.rendering.PageDrawer.drawPage(PageDrawer.java:262) at
> org.apache.pdfbox.rendering.PDFRenderer.renderImage(PDFRenderer.java:314) at
> org.apache.pdfbox.rendering.PDFRenderer.renderImage(PDFRenderer.java:243) at
> org.apache.pdfbox.rendering.PDFRenderer.renderImageWithDPI(PDFRenderer.java:229){code}
> We check the different setting of MemoryUsageSetting (TempFileOnly,
> MainMemoryOnly), settings of DPI.
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