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https://issues.apache.org/jira/browse/XERCESJ-380?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael Glavassevich resolved XERCESJ-380.
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Resolution: Fixed
I've just committed an improvement to code in SVN which covers a number of
common cases. We now build a representation of large minOccurs/maxOccurs in
constant time and memory (which uses a counter during validation) for element
and wildcard particles when each model group particle in the content model:
* has minOccurs/maxOccurs == 1; or
* contains only one element/wildcard particle with minOccurs/maxOccurs == 1
Handling sequences, choices and nested minOccurs/maxOccurs is somewhat tricker.
We would need a more general solution than the one implemented for elements
and wildcards to process those gracefully. I've opened a new JIRA issue [1]
for tracking that.
[1] http://issues.apache.org/jira/browse/XERCESJ-1227
> stackOverflow with maxOccurs over 5000 and less than unbounded
> --------------------------------------------------------------
>
> Key: XERCESJ-380
> URL: https://issues.apache.org/jira/browse/XERCESJ-380
> Project: Xerces2-J
> Issue Type: Bug
> Components: XML Schema Structures
> Affects Versions: 2.0.2
> Environment: Operating System: Windows XP
> Platform: PC
> Reporter: afuqua
> Assigned To: Michael Glavassevich
>
> On Windows XP and NT and 2000, when validating a document with the schema
> below, I get a stackOverflow. I've seen the overflow report in 2 different
> locations for different schemas:
> java.lang.StackOverflowError
> at org.apache.xerces.impl.xs.models.XSDFACM.postTreeBuildInit
> (XSDFACM.java:899)
> ....
> java.lang.StackOverflowError
> at org.apache.xerces.impl.xs.models.XSDFACM.calcFollowList
> (XSDFACM.java:732)
> ....
> Here's an example schema to reproduce the problem:
> <?xml version="1.0" encoding="UTF-8"?>
> <schema xmlns="http://www.w3.org/2001/XMLSchema";
> targetNamespace="http://www.iss.net/cpe/stackOverflow";
> xmlns:stackOverflow="http://www.iss.net/cpe/stackOverflow";
> elementFormDefault="qualified"
> attributeFormDefault="unqualified">
>
> <element name="policy" type="stackOverflow:PolicyType"/>
> <complexType name="PolicyType">
> <sequence>
> <!-- fails for me as low as 5000 and up -->
> <element name='sensitivity'
> type='stackOverflow:sensitivityType' minOccurs='0' maxOccurs='65535'/>
> </sequence>
> </complexType>
>
> <complexType name="sensitivityType">
> <attribute name="sensitivity" type="int" use="required"/>
> </complexType>
> </schema>
> Here's a code excerpt:
> DOMParser domParser = new DOMParser();
> domParser.setErrorHandler( errorHandler );
> domParser.setFeature( "http://xml.org/sax/features/namespaces";, true );
> domParser.setFeature( "http://apache.org/xml/features/validation/schema";,
> true );
> domParser.setFeature( "http://xml.org/sax/features/validation";, true );
> domParser.setProperty( "http://apache.org/xml/properties/schema/external-
> schemaLocation", ....);
> domParser.parse( new InputSource( new StringReader( .... )) );
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