FULL PRODUCT VERSION :
java version "1.8.0_102"
Java(TM) SE Runtime Environment (build 1.8.0_102-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.102-b14, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 6.1.7601]

A DESCRIPTION OF THE PROBLEM :
SAX parser with some features throws java.lang.InternalError when parsing invalid XML.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Run the test case.


EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Parser throws SAXException.
ACTUAL -
Parser throws java.lang.InternalError.

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
public class XmlErrorTest {

    public static void main(String[] args) {
        try {
            String invalidXml = "<a>";
            SAXParserFactory saxParserFactory = SAXParserFactory.newInstance();
            saxParserFactory.setFeature("http://apache.org/xml/features/continue-after-fatal-error", true);
            SAXParser parser = saxParserFactory.newSAXParser();
            parser.parse(new InputSource(new StringReader(invalidXml)), new DefaultHandler() {
                @Override
                public void fatalError(SAXParseException e) throws SAXException {
                    System.err.printf("%s%n", e.getMessage());
                }
            });
        } catch (Throwable e) {
            e.printStackTrace();
        }
    }
}

---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Use apache Xerces instead of built-in parser.