PDFCheckbox NPE

Exception in thread "main" org.apache.tika.exception.TikaException: Unexpected RuntimeException from org.apache.tika.parser.pdf.PDFParser@1747c
	at org.apache.tika.parser.CompositeParser.parse(CompositeParser.java:244)
	at org.apache.tika.parser.CompositeParser.parse(CompositeParser.java:242)
	at org.apache.tika.parser.AutoDetectParser.parse(AutoDetectParser.java:120)
	at com.sabax.extraction.FileExtractionHandler.getFileData(FileExtractionHandler.java:145)
	at GenerateIndex.main(GenerateIndex.java:59)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at com.intellij.rt.execution.application.AppMain.main(AppMain.java:134)
Caused by: java.lang.NullPointerException
	at org.apache.pdfbox.pdmodel.interactive.form.PDCheckbox.getOnValue(PDCheckbox.java:141)
	at org.apache.pdfbox.pdmodel.interactive.form.PDCheckbox.isChecked(PDCheckbox.java:79)
	at org.apache.pdfbox.pdmodel.interactive.form.PDRadioCollection.getValue(PDRadioCollection.java:128)
	at org.apache.tika.parser.pdf.PDF2XHTML.addFieldString(PDF2XHTML.java:507)
	at org.apache.tika.parser.pdf.PDF2XHTML.processAcroField(PDF2XHTML.java:461)
	at org.apache.tika.parser.pdf.PDF2XHTML.processAcroField(PDF2XHTML.java:479)
	at org.apache.tika.parser.pdf.PDF2XHTML.extractAcroForm(PDF2XHTML.java:447)
	at org.apache.tika.parser.pdf.PDF2XHTML.endDocument(PDF2XHTML.java:195)
	at org.apache.pdfbox.util.PDFTextStripper.writeText(PDFTextStripper.java:341)
	at org.apache.tika.parser.pdf.PDF2XHTML.process(PDF2XHTML.java:106)
	at org.apache.tika.parser.pdf.PDFParser.parse(PDFParser.java:143)
	at org.apache.tika.parser.CompositeParser.parse(CompositeParser.java:242)
	... 9 more

TikaInputStream tikaStream = TikaInputStream.get(stream);
    TikaResultWrapper result;
    try {
      long streamSize = tikaStream.getLength();
      Metadata metadata =
        constructMetadata(fileName, mimeType, streamSize);
      if (streamSize < maxFileSize) {
        SamplingSaxHandler handler =
          new SamplingSaxHandler(samplingSize, metadata);
        handler.setBufferLimit(bufferSize);
        parser.parse(tikaStream, handler, metadata, new ParseContext());
        result = handler.getResult();
      } else {
        result = new TikaResultWrapper(null, metadata);
      }
    } finally {
      tikaStream.close();
    }
    return result;