thread safety issue with schema validation
------------------------------------------
Key: XERCESJ-1076
URL: http://issues.apache.org/jira/browse/XERCESJ-1076
Project: Xerces2-J
Type: Bug
Components: XML Schema datatypes
Versions: 2.6.2
Environment: Java 1.4.2 or 1.5.0 on a SunOS wallaby 5.8 Generic_117350-12
sun4u sparc SUNW,Sun-Fire-V440
(Couldn't reproduce on a 1 CPU Windows 2000 box).
Reporter: Brett Watson-Luke
Parsing multiple documents in multiple threads with schema validation enabled
sometimes fails. The error reported is: org.xml.sax.SAXParseException:
cvc-pattern-valid: Value 'en' is not facet-valid with respect to pattern
'([a-zA-Z]{1,8})(-[a-zA-Z0-9]{1,8})*' for type 'language'.
The test program I will provide to recreate the problem usually runs without
error. It creates a number of threads, and parses the same document in each
thread, concurrently.
However, sometimes it fails with the reported error. I have provided a script
(runit.sh) that will repeatedly run the program.
The test program is called parseerror.ParseError. It uses an EntityResolver to
locate the schema in the classpath.
Typical program output is as follows:
> runit.sh
java version "1.4.2"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2-b28)
Java HotSpot(TM) Client VM (build 1.4.2-b28, mixed mode)
...org.xml.sax.SAXParseException: cvc-pattern-valid: Value 'en' is not
facet-valid with respect to pattern '([a-zA-Z]{1,8})(-[a-zA-Z0-9]{1,8})*' for
type 'language'.
at
org.apache.xerces.util.ErrorHandlerWrapper.createSAXParseException(Unknown
Source)
at org.apache.xerces.util.ErrorHandlerWrapper.error(Unknown Source)
at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
at
org.apache.xerces.impl.xs.XMLSchemaValidator$XSIErrorReporter.reportError(Unknown
Source)
at
org.apache.xerces.impl.xs.XMLSchemaValidator.reportSchemaError(Unknown Source)
at
org.apache.xerces.impl.xs.XMLSchemaValidator.processOneAttribute(Unknown Source)
at
org.apache.xerces.impl.xs.XMLSchemaValidator.processAttributes(Unknown Source)
at
org.apache.xerces.impl.xs.XMLSchemaValidator.handleStartElement(Unknown Source)
at org.apache.xerces.impl.xs.XMLSchemaValidator.startElement(Unknown
Source)
at
org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown Source)
at
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown
Source)
at
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown
Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at org.apache.xerces.parsers.DOMParser.parse(Unknown Source)
at org.apache.xerces.jaxp.DocumentBuilderImpl.parse(Unknown Source)
at javax.xml.parsers.DocumentBuilder.parse(Unknown Source)
at parseerror.ParseError$ParseThread.run(ParseError.java:55)
.... etc
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