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https://issues.apache.org/jira/browse/PDFBOX-5587?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17712415#comment-17712415
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Lonzak commented on PDFBOX-5587:
--------------------------------
I identified several documents where it (according to the log) did happen. I
tried it again and it didn't. I tried several documents but somehow we only
got the error for two weeks and now it is gone. That is really strange.
Could this be a concurrency issue? E.g. I found the following comment on the
getGlyph() method:
{code:java}
// PDFBOX-4219: synchronize on data because it is accessed by several threads
// when PDFBox is accessing a standard 14 font for the first time
{code}
I thus tried the image conversion using several threads but couldn't reproduce
it.
Out of curiosity: Is the code related to the system fonts or to the
(missing/invalid) font definition inside the PDF?
> NullPointerException in PDTrueTypeFont.java getPath( )
> ------------------------------------------------------
>
> Key: PDFBOX-5587
> URL: https://issues.apache.org/jira/browse/PDFBOX-5587
> Project: PDFBox
> Issue Type: Bug
> Components: Parsing
> Affects Versions: 2.0.25
> Environment: Linux server
> Reporter: Lonzak
> Assignee: Tilman Hausherr
> Priority: Major
> Fix For: 2.0.29, 3.0.0 PDFBox
>
>
> Since April we get the following NPE in our software.
> PDFBox is used to convert PDFs to images.
>
> {code:java}
> java.lang.NullPointerException: null
> at
> org.apache.pdfbox.pdmodel.font.PDTrueTypeFont.getPath(PDTrueTypeFont.java:470)
> ~[pdfbox-2.0.25.jar:2.0.25]
> at
> org.apache.pdfbox.rendering.TTFGlyph2D.getPathForGID(TTFGlyph2D.java:144)
> ~[pdfbox-2.0.25.jar:2.0.25]
> at
> org.apache.pdfbox.rendering.TTFGlyph2D.getPathForCharacterCode(TTFGlyph2D.java:93)
> ~[pdfbox-2.0.25.jar:2.0.25]
> at
> org.apache.pdfbox.rendering.PageDrawer.drawGlyph2D(PageDrawer.java:514)
> ~[pdfbox-2.0.25.jar:2.0.25]
> at
> org.apache.pdfbox.rendering.PageDrawer.showFontGlyph(PageDrawer.java:495)
> ~[pdfbox-2.0.25.jar:2.0.25]
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.showGlyph(PDFStreamEngine.java:793)
> ~[pdfbox-2.0.25.jar:2.0.25]
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.showGlyph(PDFStreamEngine.java:811)
> ~[pdfbox-2.0.25.jar:2.0.25]
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.showText(PDFStreamEngine.java:749)
> ~[pdfbox-2.0.25.jar:2.0.25]
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.showTextString(PDFStreamEngine.java:608)
> ~[pdfbox-2.0.25.jar:2.0.25]
> at
> org.apache.pdfbox.contentstream.operator.text.ShowText.process(ShowText.java:56)
> ~[pdfbox-2.0.25.jar:2.0.25]
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processOperator(PDFStreamEngine.java:939)
> ~[pdfbox-2.0.25.jar:2.0.25]
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processStreamOperators(PDFStreamEngine.java:514)
> ~[pdfbox-2.0.25.jar:2.0.25]
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processStream(PDFStreamEngine.java:492)
> ~[pdfbox-2.0.25.jar:2.0.25]
> at
> org.apache.pdfbox.contentstream.PDFStreamEngine.processPage(PDFStreamEngine.java:155)
> ~[pdfbox-2.0.25.jar:2.0.25]
> at org.apache.pdfbox.rendering.PageDrawer.drawPage(PageDrawer.java:282)
> ~[pdfbox-2.0.25.jar:2.0.25]
> at
> org.apache.pdfbox.rendering.PDFRenderer.renderImage(PDFRenderer.java:355)
> ~[pdfbox-2.0.25.jar:2.0.25]
> at
> org.apache.pdfbox.rendering.PDFRenderer.renderImage(PDFRenderer.java:272)
> ~[pdfbox-2.0.25.jar:2.0.25]
> at
> org.apache.pdfbox.rendering.PDFRenderer.renderImageWithDPI(PDFRenderer.java:258)
> ~[pdfbox-2.0.25.jar:2.0.25]{code}
> This is a bit strange, since I thought that this bug was fixed with
> PDFBOX-3488
> PdfBox is running on a linux server but when I tried to access the PDFs I
> failed to find the right one (over 1 million docs on that server).
> On the other hand the fix linked in the ticket points to the following
> implementation:
>
> {code:java}
> @Override
> public GeneralPath getPath(int code) throws IOException{
> if (ttf.getGlyph() == null){
> throw new IOException("glyf table is missing in font " + getName());
> } {code}
> which does not exist anymore in 2.0.3 or higher:
>
> {code:java}
> @Override
> public GeneralPath getPath(int code) throws IOException{
> int gid = codeToGID(code);
> GlyphData glyph = ttf.getGlyph().getGlyph(gid); {code}
> Any idea why an NPE might occur?
> `ttf` might be null or `getGlyph` returns null?
>
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