TOmcat stops working if the reference URL is wrong

I Tomcat setup runs fine until I add any application reference an application containing web.xml file. This web.xml file has the reference:
"http://java.sun.com/j2ee/dtds/web-app_2_2.dtd">
which has been renamed on the web. I'v changed that, But, I still have this problem of Tomcat not running properly:
XmlMapper: Can't find resource for entity: -//Sun Microsystems, Inc.//DTD Web Ap
plication 2.3//EN --> http://java.sun.com/j2ee/dtds/web-app_2_3.dtd "null"
ERROR reading C:\bugrats\WEB-INF\web.xml
At External entity not found: "http://java.sun.com/j2ee/dtds/web-app_2_3.dtd".
ERROR reading c:\bugrats\WEB-INF\web.xml
java.net.ConnectException: Connection timed out: connect
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:292)
at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:158)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:145)
at java.net.Socket.connect(Socket.java:391)
at java.net.Socket.connect(Socket.java:349)
at sun.net.NetworkClient.doConnect(NetworkClient.java:142)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:344)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:532)
at sun.net.www.http.HttpClient.<init>(HttpClient.java:280)
at sun.net.www.http.HttpClient.<init>(HttpClient.java:290)
at sun.net.www.http.HttpClient.New(HttpClient.java:302)
at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection
.java:397)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLCon
nection.java:490)
at java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:237
at org.apache.crimson.parser.Resolver.createInputSource(Resolver.java:28
7)
at org.apache.crimson.parser.ExternalEntity.getInputSource(ExternalEntit
y.java:91)
at org.apache.crimson.parser.Parser2.pushReader(Parser2.java:3003)
at org.apache.crimson.parser.Parser2.externalParameterEntity(Parser2.jav
a:2738)
at org.apache.crimson.parser.Parser2.maybeDoctypeDecl(Parser2.java:1155)
at org.apache.crimson.parser.Parser2.parseInternal(Parser2.java:489)
at org.apache.crimson.parser.Parser2.parse(Parser2.java:305)
at org.apache.crimson.parser.XMLReaderImpl.parse(XMLReaderImpl.java:433)
at org.xml.sax.helpers.XMLReaderAdapter.parse(XMLReaderAdapter.java:223)
at javax.xml.parsers.SAXParser.parse(SAXParser.java:317)
at javax.xml.parsers.SAXParser.parse(SAXParser.java:260)
at org.apache.tomcat.util.xml.XmlMapper.readXml(XmlMapper.java:214)
at org.apache.tomcat.context.WebXmlReader.processWebXmlFile(WebXmlReader
.java:202)
TIA.

Your url points to a DTD url that displays:
The file named http://java.sun.com/j2ee/dtds/web-app_2_3.dtd
has been renamed to http://java.sun.com/dtd/web-app_2_3.dtd
in the most current version of the specification.
Please update your application to use the new name.
Note that removal of the "s".
Very very frustrating I know.

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