Thanks for the suggestion, Chris. That's probably our next step (parser pool).
We've reduced the parser creation time somewhat using two system properties: javax.xml.parsers.DocumentBuilderFactory ...set to ... org.apache.xerces.jaxp.DocumentBuilderFactoryImpl ..and.. javax.xml.parsers.SAXParserFactory ...set to... org.apache.xerces.jaxp.SAXParserFactoryImpl -----Original Message----- From: Christopher Ebert [mailto:[EMAIL PROTECTED] Sent: Friday, August 27, 2004 1:06 PM To: [EMAIL PROTECTED] Subject: RE: Xerces overriding JDK XML parser - Classloader Issues? Hi, I think DocumentBuilder objects can be re-used, so you could use an object pool, build some number of them on startup and reuse them... Chris -----Original Message----- From: Rick Bullotta [mailto:[EMAIL PROTECTED] Sent: Friday, August 27, 2004 08:50 To: [EMAIL PROTECTED] Subject: Xerces overriding JDK XML parser - Classloader Issues? Here's our scenario: We're running JDK 1.4.2_05 with the latest Xerces/Xalan in the JRE's lib/endorsed directory. We run servlets (on New Atlanta's ServletExec engine) and are experiencing some serious performance issues when instantiating a parser instance from within a servlet using: DocumentBuilderFactory dFactory = DocumentBuilderFactory.newInstance(); dFactory.setNamespaceAware(true); DocumentBuilder dBuilder = dFactory.newDocumentBuilder(); We've been working with the New Atlanta folks trying to sleuth it out, and the issue seems to be that somewhere in the factory code are getResourceAsStream() calls, probably to load property or configuration files. These calls seem to be performed every request, rather than loaded once, and when there are lots of JARS in the classpath, this operation can be VERY VERY expensive searching the JARS. Question is: Is there any way to bypass this frequent loading using either: a) JVM command line parameters b) Setting a property through code c) Some type of singleton object Many thanks! Rick Bullotta CTO Lighthammer Software (http://www.lighthammer.com) --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
