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https://issues.apache.org/jira/browse/PDFBOX-3082?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15005589#comment-15005589
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Tilman Hausherr commented on PDFBOX-3082:
-----------------------------------------
It is already marked as blocker, although it won't be solved for RC2 (due
soon). The problem is not all of us own Mac 10.11.x machines. Mine is a W7
machine, and PDFDebugger can download fonts with -Xmx25m (but fails with 20m).
> High memory consumption while building font cache
> -------------------------------------------------
>
> Key: PDFBOX-3082
> URL: https://issues.apache.org/jira/browse/PDFBOX-3082
> Project: PDFBox
> Issue Type: Bug
> Components: PDModel
> Affects Versions: 2.0.0
> Reporter: Maruan Sahyoun
> Priority: Blocker
> Fix For: 2.0.0
>
> Attachments: heap-usage.png
>
>
> When the font cache is build there is a very high memory consumption.
> For this small program
> {code}
> public static void main(String[] args)
> {
> PDFont font = PDType1Font.HELVETICA;
> try
> {
> System.in.read();
> }
> catch (IOException e)
> {
> // TODO Auto-generated catch block
> e.printStackTrace();
> }
> }
> {code}
> I need to set {{-Xmx1512M}} in order to avoid an OOM
> Smaller memory settings will bring this
> {code}
> $ java -Xmx1256M -jar Test.jar
> Nov 03, 2015 2:48:32 AM org.apache.pdfbox.pdmodel.font.FileSystemFontProvider
> loadCache
> WARNUNG: New fonts found, font cache will be re-built
> Nov 03, 2015 2:48:32 AM org.apache.pdfbox.pdmodel.font.FileSystemFontProvider
> <init>
> WARNUNG: Building font cache, this may take a while
> Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
> at org.apache.fontbox.cff.IndexData.initData(IndexData.java:95)
> at org.apache.fontbox.cff.CFFParser.readIndexData(CFFParser.java:163)
> at org.apache.fontbox.cff.CFFParser.parseFont(CFFParser.java:393)
> at org.apache.fontbox.cff.CFFParser.parse(CFFParser.java:115)
> at org.apache.fontbox.ttf.CFFTable.read(CFFTable.java:53)
> at org.apache.fontbox.ttf.TrueTypeFont.readTable(TrueTypeFont.java:377)
> at org.apache.fontbox.ttf.OpenTypeFont.getCFF(OpenTypeFont.java:61)
> at
> org.apache.pdfbox.pdmodel.font.FileSystemFontProvider.addTrueTypeFontImpl(FileSystemFontProvider.java:432)
> at
> org.apache.pdfbox.pdmodel.font.FileSystemFontProvider.addTrueTypeCollection(FileSystemFontProvider.java:344)
> at
> org.apache.pdfbox.pdmodel.font.FileSystemFontProvider.scanFonts(FileSystemFontProvider.java:243)
> at
> org.apache.pdfbox.pdmodel.font.FileSystemFontProvider.<init>(FileSystemFontProvider.java:224)
> at
> org.apache.pdfbox.pdmodel.font.FontMapperImpl$DefaultFontProvider.<clinit>(FontMapperImpl.java:132)
> at
> org.apache.pdfbox.pdmodel.font.FontMapperImpl.getProvider(FontMapperImpl.java:151)
> at
> org.apache.pdfbox.pdmodel.font.FontMapperImpl.findFont(FontMapperImpl.java:415)
> at
> org.apache.pdfbox.pdmodel.font.FontMapperImpl.findFontBoxFont(FontMapperImpl.java:378)
> at
> org.apache.pdfbox.pdmodel.font.FontMapperImpl.getFontBoxFont(FontMapperImpl.java:352)
> at
> org.apache.pdfbox.pdmodel.font.PDType1Font.<init>(PDType1Font.java:114)
> at
> org.apache.pdfbox.pdmodel.font.PDType1Font.<clinit>(PDType1Font.java:76)
> at PDFontTest.main(PDFontTest.java:11)
> {code}
> Possible cause is a large number of fonts on my system
> {code}
> Nov 03, 2015 2:56:01 AM org.apache.pdfbox.pdmodel.font.FileSystemFontProvider
> loadCache
> WARNUNG: New fonts found, font cache will be re-built
> Nov 03, 2015 2:56:01 AM org.apache.pdfbox.pdmodel.font.FileSystemFontProvider
> <init>
> WARNUNG: Building font cache, this may take a while
> Nov 03, 2015 2:56:22 AM org.apache.pdfbox.pdmodel.font.FileSystemFontProvider
> saveCache
> WARNUNG: Finished building font cache, found 876 fonts
> {code}
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