Warning: validation was turned on but an org.xml.sax.ErrorHandler was not set, which is probably not what is desired. Parser will use a default ErrorHandler to print the first aa....aa errors. Please call the 'setErrorHandler' method to fix this.

Warning: Validation was performed, but org.xml.sax.ErrorHandler is not set. This is not desirable. The parser will use default ErrorHandler to report first error aa....aa. Call the setErrorHandler method to fix this problem.