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https://issues.apache.org/jira/browse/PDFBOX-3562?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15661469#comment-15661469
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Zaid Amir commented on PDFBOX-3562:
-----------------------------------
That was fast, many thanks.
> PDFBox hangs indefinately when rendering certain files
> ------------------------------------------------------
>
> Key: PDFBOX-3562
> URL: https://issues.apache.org/jira/browse/PDFBOX-3562
> Project: PDFBox
> Issue Type: Bug
> Components: Rendering
> Affects Versions: 2.0.3
> Environment: Ubuntu 14.04, Oracle Java SE 1.8
> Reporter: Zaid Amir
> Assignee: Tilman Hausherr
> Labels: shading
> Fix For: 2.0.4, 2.1.0
>
> Attachments: PDFBOX-3562-BitsPerFlag2.pdf,
> PDFBOX-3562-BitsPerFlag2.pdf-1.png
>
>
> There seems to be an issue with PDFBox when rendering certain PDF files, when
> calling renderImageWithDPI; the call seems to hang indefinitely.
> My jar file is ruunning with the parameter:
> -Dsun.java2d.cmm=sun.java2d.cmm.kcms.KcmsServiceProvider
> I noticed this issue on this file:[
> https://1drv.ms/b/s!Av-Yk52R4YupvcUEZFueSnXFh6_pXw]
> Here is the call to renderImageWithDPI:
> {quote}
> PDDocument doc = PDDocument.load(file);
> PDFRenderer renderer = new PDFRenderer(doc);
> BufferedImage img = renderer.renderImageWithDPI(0, 300.0f, ImageType.RGB);
> {quote}
> checking the stack trace using jstack gives me the following:
> {quote}
> "pool-3-thread-1" #14 prio=5 os_prio=0 tid=0x00007f0bd41d2000 nid=0x76d4
> runnable [0x00007f0bb44db000]
> java.lang.Thread.State: RUNNABLE
> at org.apache.log4j.Category.getEffectiveLevel(Category.java:442)
> at org.apache.log4j.Category.log(Category.java:855)
> at org.slf4j.impl.Log4jLoggerAdapter.log(Log4jLoggerAdapter.java:595)
> at
> org.apache.commons.logging.impl.SLF4JLocationAwareLog.warn(SLF4JLocationAwareLog.java:179)
> at
> org.apache.pdfbox.pdmodel.graphics.shading.Type4ShadingContext.collectTriangles(Type4ShadingContext.java:152)
> at
> org.apache.pdfbox.pdmodel.graphics.shading.Type4ShadingContext.<init>(Type4ShadingContext.java:64)
> at
> org.apache.pdfbox.pdmodel.graphics.shading.Type4ShadingPaint.createContext(Type4ShadingPaint.java:66)
> at
> sun.java2d.pipe.AlphaPaintPipe.startSequence(AlphaPaintPipe.java:84)
> at sun.java2d.pipe.AAShapePipe.renderTiles(AAShapePipe.java:168)
> at sun.java2d.pipe.AAShapePipe.renderPath(AAShapePipe.java:159)
> at sun.java2d.pipe.AAShapePipe.fill(AAShapePipe.java:68)
> at
> sun.java2d.pipe.PixelToParallelogramConverter.fill(PixelToParallelogramConverter.java:164)
> at sun.java2d.pipe.ValidatePipe.fill(ValidatePipe.java:160)
> at sun.java2d.SunGraphics2D.fill(SunGraphics2D.java:2527)
> at
> org.apache.pdfbox.rendering.PageDrawer.shadingFill(PageDrawer.java:933)
> at
> org.apache.pdfbox.contentstream.operator.graphics.ShadingFill.process(ShadingFill.java:41)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processOperator(PDFStreamEngine.java:815)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processStreamOperators(PDFStreamEngine.java:472)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processStream(PDFStreamEngine.java:446)
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processPage(PDFStreamEngine.java:149)
> at
> org.apache.pdfbox.rendering.PageDrawer.drawPage(PageDrawer.java:189)
> at
> org.apache.pdfbox.rendering.PDFRenderer.renderImage(PDFRenderer.java:145)
> at
> org.apache.pdfbox.rendering.PDFRenderer.renderImageWithDPI(PDFRenderer.java:94)
> at
> com.documentconverter.PDFManager_Box.GetThumbPDF(PDFManager_Box.java:58)
> {quote}
> I left my application running over the weekend to see if the call will
> eventually return, three days later and still the application is at the same
> spot.
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