DO NOT REPLY [Bug 10597] New: - ArrayIndexOutOfBoundsException after processing invalid XML

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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=10597

ArrayIndexOutOfBoundsException after processing invalid XML

           Summary: ArrayIndexOutOfBoundsException after processing invalid
                    XML
           Product: XalanJ2
           Version: 2.2.x
          Platform: Other
        OS/Version: AIX
            Status: NEW
          Severity: Normal
          Priority: Other
         Component: org.apache.xalan.transformer
        AssignedTo: xalan-dev@xml.apache.org
        ReportedBy: jaeda_goodman@bigfoot.com


After processing XML which contains invalid Unicode characters, (e.g. 0x18), 
the next time the same stylesheet is used to process valid XML, it usually 
falls over with an ArrayIndexOutOfBounds exception.

This is the code snippet which causes the problem:

		XslTranslator transform = null;
				try {
							transform = 
xslmanager.loadStyleSheetOnDemand(type.style, type.getName());
							if (transform == null)
							  log.debug("Failed to 
load style sheet");
						}
						catch 
(TransformerConfigurationException ex){
							log.error("XSLT 
Transformation problem", ex);
							return false;
						}
							        
						try {
							log.debug("Applying 
style sheet");
							line = 
transform.applyStyleSheet(message);
							if (line == null){
							  log.debug("Failed to 
apply style sheet");
							}  
							log.debug("Output 
data:"+line);
						}
						catch (TransformerException ex){
							log.error("Error 
transforming message", ex); // Failure point
							return false;
						}

'Failure point' is where an exception is caught the first time the code is 
called, signifying an invalid Unicode character

javax.xml.transform.TransformerException: An invalid XML character (Unicode: 
0x18) was found in the element content of the document.
        at org.apache.xalan.transformer.TransformerImpl.transform
(TransformerImpl.java:660)
        at org.apache.xalan.transformer.TransformerImpl.transform
(TransformerImpl.java:1118)

This is handled correctly and the method is called again with valid XML. This 
time another exception is thrown:

javax.xml.transform.TransformerException: -6
        at org.apache.xalan.transformer.TransformerImpl.transformNode
(TransformerImpl.java:1212)
        at org.apache.xalan.transformer.TransformerImpl.run
(TransformerImpl.java:2894)
        at java.lang.Thread.run(Thread.java:512)
---------
java.lang.ArrayIndexOutOfBoundsException: -6
        at org.apache.xml.utils.NodeVector.popPair(NodeVector.java:307)
        at org.apache.xalan.transformer.TransformerImpl.popCurrentMatched
(TransformerImpl.java:2372)
        at org.apache.xalan.transformer.TransformerImpl.applyTemplateToNode
(TransformerImpl.java:2038)
        at org.apache.xalan.transformer.TransformerImpl.transformNode
(TransformerImpl.java:1189)
        at org.apache.xalan.transformer.TransformerImpl.run
(TransformerImpl.java:2894)
        at java.lang.Thread.run(Thread.java:512)

However, the same XML can be processed if it is not proceeded by invalid XML.

Occasionally the second message is processed correctly, but if it is, the Java 
application hangs and does not terminate correctly.