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POunknown host exception while parsing an xml file
 

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    <p>when i am trying to parse an xml, i am getting following exception :-</p> <pre><code>java.net.UnknownHostException: hibernate.sourceforge.net at java.net.AbstractPlainSocketImpl.connect(Unknown Source) at java.net.PlainSocketImpl.connect(Unknown Source) at java.net.Socket.connect(Unknown Source) at java.net.Socket.connect(Unknown Source) at sun.net.NetworkClient.doConnect(Unknown Source) at sun.net.www.http.HttpClient.openServer(Unknown Source) at sun.net.www.http.HttpClient.openServer(Unknown Source) at sun.net.www.http.HttpClient.&lt;init&gt;(Unknown Source) at sun.net.www.http.HttpClient.New(Unknown Source) at sun.net.www.http.HttpClient.New(Unknown Source) at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(Unknown Source) at sun.net.www.protocol.http.HttpURLConnection.plainConnect(Unknown Source) at sun.net.www.protocol.http.HttpURLConnection.connect(Unknown Source) at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source) at org.apache.xerces.impl.XMLEntityManager.setupCurrentEntity(Unknown Source) at org.apache.xerces.impl.XMLEntityManager.startEntity(Unknown Source) at org.apache.xerces.impl.XMLEntityManager.startDTDEntity(Unknown Source) at org.apache.xerces.impl.XMLDTDScannerImpl.setInputSource(Unknown Source) at org.apache.xerces.impl.XMLDocumentScannerImpl$DTDDispatcher.dispatch(Unknown Source) at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source) at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source) at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source) at org.apache.xerces.parsers.XMLParser.parse(Unknown Source) at org.apache.xerces.parsers.DOMParser.parse(Unknown Source) at org.apache.xerces.jaxp.DocumentBuilderImpl.parse(Unknown Source) at javax.xml.parsers.DocumentBuilder.parse(Unknown Source) </code></pre> <p>The code that i am using to parse the xml is below:-</p> <pre><code>File hbmFile = new File(hbmFileName); DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); DocumentBuilder db = dbf.newDocumentBuilder(); Document doc = db.parse(hbmFile); </code></pre> <p>i am trying to parse the xml that has been written for hibernate, actually it is a hibernate mapping file.</p> <p>The xml that i am trying to parse is below:-</p> <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt; &lt;!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"&gt; &lt;hibernate-mapping&gt; &lt;class name="org.hibernate.entity.Student" table="table_student"&gt; &lt;id name="rollNo" column="rool_no" type="int"/&gt; &lt;property name="name" column="st_name" type="string"/&gt; &lt;set name="marks" table="table_marks"&gt; &lt;key column="roll_no"/&gt; &lt;composite-element class="org.hibernate.entity.StudentMarks"&gt; &lt;property name="subject" column="st_sub"/&gt; &lt;property name="marks" column="st_marks"/&gt; &lt;/composite-element&gt; &lt;/set&gt; &lt;/class&gt; &lt;/hibernate-mapping&gt; </code></pre> <p>Please help.</p>
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