PDFBox TrueTypeFont exceptions

[aaccomazzi]

A number of exceptions appear in the PDF extraction log file which indicate a bug in reading true font files. The issue is discussed here: https://issues.apache.org/jira/browse/PDFBOX-2428

We should try to see if a PDFBox upgrade fixes the problem for us.

2016-12-01 12:03:49 ERROR TrueTypeFont:286 - An error occured when reading table hmtx
java.io.EOFException
        at org.apache.fontbox.ttf.MemoryTTFDataStream.readSignedShort(MemoryTTFDataStream.java:139)
        at org.apache.fontbox.ttf.HorizontalMetricsTable.initData(HorizontalMetricsTable.java:62)
        at org.apache.fontbox.ttf.TrueTypeFont.initializeTable(TrueTypeFont.java:280)
        at org.apache.fontbox.ttf.TrueTypeFont.getHorizontalMetrics(TrueTypeFont.java:204)
        at org.apache.fontbox.ttf.TrueTypeFont.getAdvanceWidth(TrueTypeFont.java:346)
        at org.apache.pdfbox.pdmodel.font.PDTrueTypeFont.getFontWidth(PDTrueTypeFont.java:677)
        at org.apache.pdfbox.pdmodel.font.PDSimpleFont.getFontWidth(PDSimpleFont.java:231)
        at org.apache.pdfbox.pdmodel.font.PDSimpleFont.getSpaceWidth(PDSimpleFont.java:533)
        at org.apache.pdfbox.util.PDFStreamEngine.processEncodedText(PDFStreamEngine.java:355)
        at org.apache.pdfbox.util.operator.ShowText.process(ShowText.java:45)
        at org.apache.pdfbox.util.PDFStreamEngine.processOperator(PDFStreamEngine.java:557)
        at org.apache.pdfbox.util.PDFStreamEngine.processSubStream(PDFStreamEngine.java:268)
        at org.apache.pdfbox.util.PDFStreamEngine.processSubStream(PDFStreamEngine.java:235)
        at org.apache.pdfbox.util.PDFStreamEngine.processStream(PDFStreamEngine.java:215)
        at org.apache.pdfbox.util.PDFTextStripper.processPage(PDFTextStripper.java:460)
        at org.apache.pdfbox.util.PDFTextStripper.processPages(PDFTextStripper.java:385)
        at org.apache.pdfbox.util.PDFTextStripper.writeText(PDFTextStripper.java:344)
        at org.apache.pdfbox.util.PDFTextStripper.getText(PDFTextStripper.java:275)
        at org.adslabs.adsfulltext.PDFExtract.extract(PDFExtract.java:112)
        at org.adslabs.adsfulltext.PDFExtractList.f(PDFExtractList.java:53)
        at org.adslabs.adsfulltext.Worker.process(Worker.java:144)
        at org.adslabs.adsfulltext.Worker.subscribe(Worker.java:187)
        at org.adslabs.adsfulltext.Worker.run(Worker.java:279)
        at org.adslabs.adsfulltext.App.main(App.java:82)