[PDFBOX-4219] Multithreading problem when rendering several documents with Standard 14 fonts

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.9, 3.0.0 PDFBox
• Fix Version/s: 2.0.12, 3.0.0 PDFBox
• Component/s: FontBox, Rendering
• Labels: multi-threading multithreading
• Environment: Windows 7 ; jdk1.8.0_172
• Assignee: Tilman Hausherr
• Reporter: Tilman Hausherr
• Created: 11/May/18 09:06
• Updated: 16/Jun/22 16:29
• Resolved: 26/Aug/18 09:17

Description

I get rendering errors and sometimes exceptions in my regression tests. It is somehow related to several threads initializing standard 14 fonts. It happens only about every 25 times in a test program I created. That one renders 2 files in 4 threads and compares the result with the existing result.

My theory is that one thread accesses the naming table and another accesses the glyf table, and both change the stream position. I tried several things in the last months to avoid it, all were unsuccessful and I lost my notes about it last winter due to a static discharge on a usb stick. (Thank you KINGSTON!)

Here's the output when it doesn't go well:

11.05.2018 10:54:26.322 WARN  [pool-1-thread-4] org.apache.pdfbox.pdmodel.font.PDType1Font:296 - Using fallback font TimesNewRomanPS-BoldMT for Galliard-Bold
11.05.2018 10:54:26.323 WARN  [pool-1-thread-2] org.apache.pdfbox.pdmodel.font.PDType1Font:296 - Using fallback font TimesNewRomanPS-BoldMT for Galliard-Bold
11.05.2018 10:54:26.386 WARN  [pool-1-thread-2] org.apache.pdfbox.pdmodel.font.PDType1Font:296 - Using fallback font TimesNewRomanPSMT for Galliard-Roman
11.05.2018 10:54:26.421 WARN  [pool-1-thread-4] org.apache.pdfbox.pdmodel.font.PDType1Font:296 - Using fallback font TimesNewRomanPSMT for Galliard-Roman
11.05.2018 10:54:26.697 WARN  [pool-1-thread-2] org.apache.pdfbox.pdmodel.font.PDType1Font:296 - Using fallback font TimesNewRomanPS-ItalicMT for Galliard-Italic
11.05.2018 10:54:26.818 WARN  [pool-1-thread-4] org.apache.pdfbox.pdmodel.font.PDType1Font:296 - Using fallback font TimesNewRomanPS-ItalicMT for Galliard-Italic
C:\Users\XXX\Documents\Java\PDFBox reactor\pdfbox\src\test\resources\input\rendering\166292-fi-ligature.pdf
oh oh
C:\Users\XXX\Documents\Java\PDFBox reactor\pdfbox\src\test\resources\input\rendering\166292-fi-ligature.pdf
oh oh
C:\Users\XXX\Documents\Java\PDFBox reactor\pdfbox\src\test\resources\input\rendering\014261-p3-ccitt.pdf
oh oh
C:\Users\XXX\Documents\Java\PDFBox reactor\pdfbox\src\test\resources\input\rendering\014261-p3-ccitt.pdf
oh oh
done

Sometimes in the past I got exceptions:

Exception in thread "Thread-2" java.lang.RuntimeException: java.io.IOException: Unexpected end of TTF stream reached
	at pdfboxpageimageextraction.MulithreadTest.run(MulithreadTest.java:87)
Caused by: java.io.IOException: Unexpected end of TTF stream reached
	at org.apache.fontbox.ttf.TTFDataStream.read(TTFDataStream.java:274)
	at org.apache.fontbox.ttf.TTFDataStream.readString(TTFDataStream.java:91)
	at org.apache.fontbox.ttf.NamingTable.read(NamingTable.java:113)
	at org.apache.fontbox.ttf.TrueTypeFont.readTable(TrueTypeFont.java:373)
	at org.apache.fontbox.ttf.TrueTypeFont.getTable(TrueTypeFont.java:163)
	at org.apache.fontbox.ttf.TrueTypeFont.getNaming(TrueTypeFont.java:179)
	at org.apache.fontbox.ttf.TrueTypeFont.getName(TrueTypeFont.java:471)
	at org.apache.pdfbox.pdmodel.font.PDType1Font.<init>(PDType1Font.java:296)
	at org.apache.pdfbox.pdmodel.font.PDFontFactory.createFont(PDFontFactory.java:62)
	at org.apache.pdfbox.pdmodel.PDResources.getFont(PDResources.java:143)
	at org.apache.pdfbox.contentstream.operator.text.SetFontAndSize.process(SetFontAndSize.java:60)
	at org.apache.pdfbox.contentstream.PDFStreamEngine.processOperator(PDFStreamEngine.java:853)
	at org.apache.pdfbox.contentstream.PDFStreamEngine.processStreamOperators(PDFStreamEngine.java:506)
	at org.apache.pdfbox.contentstream.PDFStreamEngine.processStream(PDFStreamEngine.java:478)
	at org.apache.pdfbox.contentstream.PDFStreamEngine.processPage(PDFStreamEngine.java:156)
	at org.apache.pdfbox.rendering.PageDrawer.drawPage(PageDrawer.java:258)
	at org.apache.pdfbox.rendering.PDFRenderer.renderImage(PDFRenderer.java:225)
	at org.apache.pdfbox.rendering.PDFRenderer.renderImageWithDPI(PDFRenderer.java:164)

Sometimes I get an AIOOBE:

Exception in thread "Thread-1" java.lang.ArrayIndexOutOfBoundsException
	at org.apache.fontbox.ttf.BufferedRandomAccessFile.read(BufferedRandomAccessFile.java:158)
	at org.apache.fontbox.ttf.RAFDataStream.read(RAFDataStream.java:167)
	at org.apache.fontbox.ttf.TTFDataStream.read(TTFDataStream.java:264)
	at org.apache.fontbox.ttf.TTFDataStream.readString(TTFDataStream.java:91)
	at org.apache.fontbox.ttf.NamingTable.read(NamingTable.java:113)
	at org.apache.fontbox.ttf.TrueTypeFont.readTable(TrueTypeFont.java:373)
	at org.apache.fontbox.ttf.TrueTypeFont.getTable(TrueTypeFont.java:163)
	at org.apache.fontbox.ttf.TrueTypeFont.getNaming(TrueTypeFont.java:179)
	at org.apache.fontbox.ttf.TrueTypeFont.getName(TrueTypeFont.java:471)
	at org.apache.pdfbox.pdmodel.font.PDType1Font.<init>(PDType1Font.java:296)
	at org.apache.pdfbox.pdmodel.font.PDFontFactory.createFont(PDFontFactory.java:62)
	at org.apache.pdfbox.pdmodel.PDResources.getFont(PDResources.java:143)
	at org.apache.pdfbox.contentstream.operator.text.SetFontAndSize.process(SetFontAndSize.java:60)
	at org.apache.pdfbox.contentstream.PDFStreamEngine.processOperator(PDFStreamEngine.java:853)
	at org.apache.pdfbox.contentstream.PDFStreamEngine.processStreamOperators(PDFStreamEngine.java:506)
	at org.apache.pdfbox.contentstream.PDFStreamEngine.processStream(PDFStreamEngine.java:478)
	at org.apache.pdfbox.contentstream.PDFStreamEngine.processPage(PDFStreamEngine.java:156)
	at org.apache.pdfbox.rendering.PageDrawer.drawPage(PageDrawer.java:258)
	at org.apache.pdfbox.rendering.PDFRenderer.renderImage(PDFRenderer.java:225)
	at org.apache.pdfbox.rendering.PDFRenderer.renderImageWithDPI(PDFRenderer.java:164)

Issue Links

• is related to: PDFBOX-5460 Deadlock in TrueTypeFont and RAFDataStream