[jira] [Created] (CAMEL-11000) Property 'accessExternalDTD' is not recognized by (all) Xerces

["Bernard Ligny (JIRA)" <ji...@apache.org>]

Bernard Ligny created CAMEL-11000:
-------------------------------------

             Summary: Property 'accessExternalDTD' is not recognized by (all) Xerces
                 Key: CAMEL-11000
                 URL: https://issues.apache.org/jira/browse/CAMEL-11000
             Project: Camel
          Issue Type: Bug
          Components: camel-validator
    Affects Versions: 2.18.3
            Reporter: Bernard Ligny


When upgrading from v2.18.1 to 2.18.3, we encounter a (blocking) regression, preventing routes involving validator component to successfully start.

Indeed, one of the recent validation-related changes is not fully compatible with all versions of Xerces. Especially when deployed on JBoss Wildlfy 10.1.0.Final :-(

*Stack trace*:
{code:java}
Caused by: java.lang.IllegalStateException: org.xml.sax.SAXNotRecognizedException: Property 'http://javax.xml.XMLConstants/property/accessExternalDTD' is not recognized.
	at org.apache.camel.processor.validation.SchemaReader.createSchemaFactory(SchemaReader.java:181)
	at org.apache.camel.processor.validation.SchemaReader.getSchemaFactory(SchemaReader.java:152)
	at org.apache.camel.processor.validation.SchemaReader.createSchema(SchemaReader.java:192)
	at org.apache.camel.processor.validation.SchemaReader.loadSchema(SchemaReader.java:84)
	at org.apache.camel.component.validator.ValidatorEndpoint.createProducer(ValidatorEndpoint.java:119)
	at org.apache.camel.impl.ProducerCache.doGetProducer(ProducerCache.java:574)
	... 78 more
Caused by: org.xml.sax.SAXNotRecognizedException: Property 'http://javax.xml.XMLConstants/property/accessExternalDTD' is not recognized.
	at org.apache.xerces.jaxp.validation.XMLSchemaFactory.setProperty(XMLSchemaFactory.java:436)
	at __redirected.__SchemaFactory.setProperty(__SchemaFactory.java:143)
	at org.apache.camel.processor.validation.SchemaReader.createSchemaFactory(SchemaReader.java:178)
	... 83 more
{code}


In particular, in the following code:

{code:java}
protected SchemaFactory createSchemaFactory() {
   ...
	try {
		factory.setProperty(XMLConstants.ACCESS_EXTERNAL_DTD, "");
	} catch (SAXException e) {
		LOG.error(e.getMessage(), e);
		throw new IllegalStateException(e);
	} 
 
}   
{code} 
   
Would it be possible to issue a simple warning, rather then raising an exception ?
(>see Oracle recommandations: https://docs.oracle.com/javase/tutorial/jaxp/properties/error.html)



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