unknown host exception while parsing an xml file

Question

when i am trying to parse an xml, i am getting following exception :-

java.net.UnknownHostException: hibernate.sourceforge.net
    at java.net.AbstractPlainS         


        

Answer 1

The parser is trying to download the DTD from hibernate.sourceforge.net in order to validate the parsed XML.

However, the DNS client on the machine can't resolve that host name for some reason (it resolves fine to 82.98.86.175 on my machine).

To avoid this problem, you have to tell the DocumentBuilderFactory to ignore the DTD:

File hbmFile = new File(hbmFileName);
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();

dbf.setValidating(false);
dbf.setFeature("http://apache.org/xml/features/nonvalidating/load-external-dtd", false);

DocumentBuilder db = dbf.newDocumentBuilder();
Document doc = db.parse(hbmFile);

See Make DocumentBuilder.parse ignore DTD references.