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https://issues.apache.org/jira/browse/PDFBOX-3082?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15011393#comment-15011393
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Tom Callahan commented on PDFBOX-3082:
--------------------------------------
Re: readTrueTypeFont:
I added that in because my cursory reading seemed to indicate that close()
should be called in every case (so that the underlying stream is reliably
closed). If this is not the intended behavior then removing it is completely
reasonable. It is also reasonable to remove the static declaration on the
interface -- it is a redundant modifier that I put there out of (dubious) habit.
> 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: cpu_mem_info.png, heap-usage.png,
> pdfbox-mem-20151117-2.patch, pdfbox-mem-20151117.patch,
> pdfbox3082screenshot.png, retained_sizes.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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