java.net.ConnectException: Connection timed out: connect with ANT build - ant

Question

We are facing java.net.ConnectException: Connection timed out: connect while doing ANT build and this is happening in all java developer machine using ANT.
We tried to block below tag in web.xml as java.sun.com is cause of issue.
but still this doesn't seem to resolve the issue.
Please help us to resolve this issue.
Below is stacktrace,
[xmltask] java.net.ConnectException: Connection timed out: connect
[xmltask] at java.net.PlainSocketImpl.socketConnect(Native Method)
[xmltask] at java.net.PlainSocketImpl.doConnect(Unknown Source)
[xmltask] at java.net.PlainSocketImpl.connectToAddress(Unknown Source)
[xmltask] at java.net.PlainSocketImpl.connect(Unknown Source)
[xmltask] at java.net.SocksSocketImpl.connect(Unknown Source)
[xmltask] at java.net.Socket.connect(Unknown Source)
[xmltask] at java.net.Socket.connect(Unknown Source)
[xmltask] at sun.net.NetworkClient.doConnect(Unknown Source)
[xmltask] at sun.net.www.http.HttpClient.openServer(Unknown Source)
[xmltask] at sun.net.www.http.HttpClient.openServer(Unknown Source)
[xmltask] at sun.net.www.http.HttpClient.<init>(Unknown Source)
[xmltask] at sun.net.www.http.HttpClient.New(Unknown Source)
[xmltask] at sun.net.www.http.HttpClient.New(Unknown Source)
[xmltask] at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(Unknown Source)
[xmltask] at sun.net.www.protocol.http.HttpURLConnection.plainConnect(Unknown Source)
[xmltask] at sun.net.www.protocol.http.HttpURLConnection.connect(Unknown Source)
[xmltask] at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
[xmltask] at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.setupCurrentEntity(Unknown Source)
[xmltask] at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.startEntity(Unknown Source)
[xmltask] at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.startDTDEntity(Unknown Source)
[xmltask] at com.sun.org.apache.xerces.internal.impl.XMLDTDScannerImpl.setInputSource(Unknown Source)
[xmltask] at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$DTDDriver.dispatch(Unknown Source)
[xmltask] at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$DTDDriver.next(Unknown Source)
[xmltask] at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(Unknown Source)
[xmltask] at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown Source)
[xmltask] at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(Unknown Source)
[xmltask] at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
[xmltask] at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
[xmltask] at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
[xmltask] at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source)
[xmltask] at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(Unknown Source)
[xmltask] at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(Unknown Source)
[xmltask] at com.oopsconsultancy.xmltask.ant.XmlTask.documentFromStream(XmlTask.java:354)
[xmltask] at com.oopsconsultancy.xmltask.ant.XmlTask.documentFromFile(XmlTask.java:371)
[xmltask] at com.oopsconsultancy.xmltask.ant.XmlTask.access$000(XmlTask.java:27)
[xmltask] at com.oopsconsultancy.xmltask.ant.XmlTask$InputFile.getDocument(XmlTask.java:215)
[xmltask] at com.oopsconsultancy.xmltask.ant.XmlTask.execute(XmlTask.java:620)
[xmltask] at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291)
[xmltask] at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
[xmltask] at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
[xmltask] at java.lang.reflect.Method.invoke(Unknown Source)
[xmltask] at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
[xmltask] at org.apache.tools.ant.Task.perform(Task.java:348)
[xmltask] at org.apache.tools.ant.Target.execute(Target.java:390)
[xmltask] at org.apache.tools.ant.Target.performTasks(Target.java:411)
[xmltask] at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1399)
[xmltask] at org.apache.tools.ant.Project.executeTarget(Project.java:1368)
[xmltask] at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
[xmltask] at org.eclipse.ant.internal.launching.remote.EclipseDefaultExecutor.executeTargets(EclipseDefaultExecutor.java:32)
[xmltask] at org.apache.tools.ant.Project.executeTargets(Project.java:1251)
[xmltask] at org.eclipse.ant.internal.launching.remote.InternalAntRunner.run(InternalAntRunner.java:424)
[xmltask] at org.eclipse.ant.internal.launching.remote.InternalAntRunner.main(InternalAntRunner.java:138)
BUILD FAILED
C:\SIGMA\SIGMA_6.0\javasource_6.0\build\build_ecams_ehr.xml:2037: Connection timed out: connect

Answer 1

Are you working behind a corporate proxy? This would block connections to the internet. You can configure your ANT script to work with proxies:
https://ant.apache.org/manual/proxy.html
I have never used xmltask but I speculate it might be failing to resolve namespaces in your XML document.
<root xmlns:e="http://my.domain.com/exampleschema">
<e:customer>
<e:name>Joe Bloggs</e:name>
<e:age>80</e:age>
</e:table>
</root>
xmltask is not a standard ANT task, it is a 3rd party extension:
http://www.oopsconsultancy.com/software/xmltask/

Answer 2

If you are on a company network , case scenario is that your local network DEV/(WhatEver its named) environment connection is experiencing network connectivity issues. Part of the build process is attempting to make an active connection to dynamically download a build ant-file and failing.
If proxy is configured to work with ant(check env ), check to see its properly configured otherwise
manually edit the proxy settings for ANT and it should built properly. Click:
https://ant.apache.org/manual/proxy.html
This should work.