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https://issues.apache.org/jira/browse/PDFBOX-2910?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14647453#comment-14647453
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Thomas Meier commented on PDFBOX-2910:
--------------------------------------

Sorry Timo. Probably my mistake as it seems that my Xmx parameter was not set 
correct. After setting it to 5GB everything seems to work fine. Thx for the 
hints!

Start:
free memory: 114.595
allocated memory: 125.952
max memory: 4.660.736
total free memory: 4.649.379

Jul 30, 2015 12:43:16 PM java.util.prefs.WindowsPreferences <init>
WARNUNG: Could not open/create prefs root node Software\JavaSoft\Prefs at root 
0x80000002. Windows RegCreateKeyEx(...) returned error code 5.
Jul 30, 2015 12:43:16 PM org.apache.pdfbox.pdmodel.font.PDType1Font <init>
WARNUNG: Using fallback font ArialMT for base font ZapfDingbats

End:
free memory: 275.404
allocated memory: 1.494.016
max memory: 4.660.736
total free memory: 3.442.124

> OutOfMemoryError by Rendern a PDF to Image
> ------------------------------------------
>
>                 Key: PDFBOX-2910
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-2910
>             Project: PDFBox
>          Issue Type: Bug
>          Components: Rendering
>    Affects Versions: 2.0.0
>         Environment: Win 7, Java 1.8
>            Reporter: Thomas Meier
>
> PDF has Images in PCD Format, no Text.
> There are scanned blueprints into PDFs.
> Plans are sensitive data, therefore not allowed to publish it.
> Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
>       at java.awt.image.DataBufferInt.<init>(DataBufferInt.java:75)
>       at java.awt.image.Raster.createPackedRaster(Raster.java:467)
>       at 
> java.awt.image.DirectColorModel.createCompatibleWritableRaster(DirectColorModel.java:1032)
>       at java.awt.image.BufferedImage.<init>(BufferedImage.java:331)
>       at 
> org.apache.pdfbox.pdmodel.graphics.color.PDDeviceGray.toRGBImage(PDDeviceGray.java:78)
>       at 
> org.apache.pdfbox.pdmodel.graphics.image.SampledImageReader.from1Bit(SampledImageReader.java:225)
>       at 
> org.apache.pdfbox.pdmodel.graphics.image.SampledImageReader.getRGBImage(SampledImageReader.java:151)
>       at 
> org.apache.pdfbox.pdmodel.graphics.image.PDImageXObject.getImage(PDImageXObject.java:251)
>       at org.apache.pdfbox.rendering.PageDrawer.drawImage(PageDrawer.java:774)
>       at 
> org.apache.pdfbox.contentstream.operator.graphics.DrawObject.process(DrawObject.java:51)
>       at 
> org.apache.pdfbox.contentstream.PDFStreamEngine.processOperator(PDFStreamEngine.java:794)
>       at 
> org.apache.pdfbox.contentstream.PDFStreamEngine.processStreamOperators(PDFStreamEngine.java:460)
>       at 
> org.apache.pdfbox.contentstream.PDFStreamEngine.processStream(PDFStreamEngine.java:437)
>       at 
> org.apache.pdfbox.contentstream.PDFStreamEngine.processPage(PDFStreamEngine.java:148)
>       at org.apache.pdfbox.rendering.PageDrawer.drawPage(PageDrawer.java:180)
>       at 
> org.apache.pdfbox.rendering.PDFRenderer.renderPage(PDFRenderer.java:205)
>       at 
> org.apache.pdfbox.rendering.PDFRenderer.renderImage(PDFRenderer.java:136)
>       at 
> org.apache.pdfbox.rendering.PDFRenderer.renderImage(PDFRenderer.java:69)
>       at pdf.pdfbox2.ScanPdfToImage.pdfToBufferedImage(ScanPdfToImage.java:75)
>       at pdf.pdfbox2.ScanPdfToImage.processPdfPage(ScanPdfToImage.java:48)
>       at pdf.pdfbox2.ScanPdfToImage.main(ScanPdfToImage.java:143)



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