This error is probably related to a byte order mark (BOM) prior to the actual XML content. You need to parse the returned String and discard the BOM, so SAXParser can process the document correctly. You will find a possible solution here.
Which app server are you using? Each one puts its logging config in a different place, though most nowadays use Commons-Logging as a wrapper around either Log4J or java.util.logging. Using Tomcat as an example, this document explains your options for configuring logging using either option. In either case you need to find or create a … Read more