Getting error while parsing an XML file in java
Question
I am using following classes in my code to parse huge XML data of 3.43MB and trying retrieve node values into hashtable.
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.xml.sax.SAXException;
My code here is throwing error:
String nodeValue=node.getNodeValue();
Error is:
Exception in thread "main" java.lang.StackOverflowError
at com.sun.org.apache.xerces.internal.dom.DeferredDocumentImpl.getNodeValueString(Unknown Source)
at com.sun.org.apache.xerces.internal.dom.DeferredDocumentImpl.getNodeValueString(Unknown Source)
at com.sun.org.apache.xerces.internal.dom.DeferredTextImpl.synchronizeData(Unknown Source)
at com.sun.org.apache.xerces.internal.dom.CharacterDataImpl.getNodeValue(Unknown Source)
even if it try to print the data in console like this:
System.out.println(node.getNodeValue());
Error is this:
Exception in thread "main" java.lang.StackOverflowError
at com.sun.org.apache.xerces.internal.dom.DeferredDocumentImpl.getNodeValueString(Unknown Source)
at com.sun.org.apache.xerces.internal.dom.DeferredDocumentImpl.getNodeValueString(Unknown Source)
at com.sun.org.apache.xerces.internal.dom.DeferredTextImpl.synchronizeData(Unknown Source)
at com.sun.org.apache.xerces.internal.dom.CharacterDataImpl.getNodeValue(Unknown Source)
I believe that node.getNodeValue() is unable to read at a certain point of XML data.
I am unable to get rid of this error. Please help me.
4 answers
solution1
0 2011-12-27 10:44:45
Do you happen to use (infinite) recursion?
Or maybe a corrupted xml file? (try to open it with your favorite browser)
solution2
0 2011-12-27 10:49:32
A 3.4 MB file is not that big, however if it contains lots of nested terms the library you are using might not cope with that. eg a HTML page can have lots of unmatched tags and this could cause an XML parser to fail this way.
eg
<html><body><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br> etc
A few hundred or thousand <br> could be enough the exhaust the stack.
solution3
0 2011-12-27 11:08:15
As for as I understand Node.getNodeValue() will not recurse through. It just prints the value of the current node which is a string. This may be data and your code dependent error.
Posting your code and XML structure (if not the complete xml) will help.
Alternatively, you can try using SAX parser.
solution4
0 2011-12-27 11:45:17
You probably just need to use -XssSOMETHING to allow for more stack. If there's really an infinite recursion, the debugger will show you the same things over and over on the stack.
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