FULL PRODUCT VERSION :
java version "1.6.0_01"
Java(TM) SE Runtime Environment (build 1.6.0_01-b06)
Java HotSpot(TM) Server VM (build 1.6.0_01-b06, mixed mode)



ADDITIONAL OS VERSION INFORMATION :
Linux 2.6.9-42.0.10.ELsmp #1 SMP Fri Feb 16 17:17:21 EST 2007 i686 i686 i386 GNU/Linux

A DESCRIPTION OF THE PROBLEM :
In 1.5, when validating an xml document against a schema, if DocumentBuilderFactory.setIgnoringElementContentWhitespace(true) was used the parser would remove all of the extraneous whitespace.  However, in 1.6 it no longer works like this (though setIgnoringComments() still works).  The following code run under 1.5 and 1.6 provide very different results:

File schemaFile = new File("test.xsd");
 
// Now attempt to load up the schema
Schema schema = null;
SchemaFactory schFactory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
schema = schFactory.newSchema(schemaFile);
 
File xmlFile = new File("test.xml");
 
// Set the options on the DocumentFactory to remove comments, remove whitespace
// and validate against the schema.
DocumentBuilderFactory docFactory = DocumentBuilderFactory.newInstance();
docFactory.setIgnoringComments(true);
docFactory.setIgnoringElementContentWhitespace(true);
docFactory.setSchema(schema);
 
DocumentBuilder parser = docFactory.newDocumentBuilder();
Document xmlDoc = parser.parse(xmlFile);


Here is the sample XML:

<Person>
        <FirstName>Doofus</FirstName><!-- MONKEY -->
        <LastName>McGee</LastName>
</Person>


Here is the sample schema:

<xsd:schema xmlns:xsd='http://www.w3.org/2001/XMLSchema'>
  <xsd:element name='Person' type='PersonType'/>
  <xsd:complexType name='PersonType'>
                <xsd:sequence>
                        <xsd:element name='FirstName' type='xsd:string'/>
                        <xsd:element name='LastName' type='xsd:string'/>
                </xsd:sequence>
        </xsd:complexType>
</xsd:schema>


In 1.5, it correctly removes the extraneous whitespace nodes and in 1.6 it does not. Java 1.5 gives me:

NODE: Person   TYPE: element   VALUE:
  NODE: FirstName   TYPE: element   VALUE:
    NODE: #text   TYPE: text   VALUE: Doofus
  NODE: LastName   TYPE: element   VALUE:
    NODE: #text   TYPE: text   VALUE: McGee


Java 1.6 gives me:

NODE: Person   TYPE: element   VALUE:
  NODE: #text   TYPE: text   VALUE:
  NODE: FirstName   TYPE: element   VALUE:
    NODE: #text   TYPE: text   VALUE: Doofus
  NODE: #text   TYPE: text   VALUE:
  NODE: LastName   TYPE: element   VALUE:
    NODE: #text   TYPE: text   VALUE: McGee
  NODE: #text   TYPE: text   VALUE:


Both versions correctly remove the comments but only 1.5 removes the whitespace.


REPRODUCIBILITY :
This bug can be reproduced always.

Release Regression From : 5.0u11
The above release value was the last known release where this 
bug was not reproducible. Since then there has been a regression.