java - Jetty http lookup when not connected to internet -

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i have embedded jetty server, using jetty 9. trying run it's local instance host=localhost , port =8080, when machine connected internet works well. when not throws exception - idea how can fix this?

java.net.unknownhostexception: java.sun.com @ java.net.abstractplainsocketimpl.connect(abstractplainsocketimpl.java:178) @ java.net.sockssocketimpl.connect(sockssocketimpl.java:392) @ java.net.socket.connect(socket.java:579) @ java.net.socket.connect(socket.java:528) @ sun.net.networkclient.doconnect(networkclient.java:180) @ sun.net.www.http.httpclient.openserver(httpclient.java:432) @ sun.net.www.http.httpclient.openserver(httpclient.java:527) @ sun.net.www.http.httpclient.<init>(httpclient.java:211) @ sun.net.www.http.httpclient.new(httpclient.java:308) @ sun.net.www.http.httpclient.new(httpclient.java:326) @ sun.net.www.protocol.http.httpurlconnection.getnewhttpclient(httpurlconnection.java:996) @ sun.net.www.protocol.http.httpurlconnection.plainconnect(httpurlconnection.java:932) @ sun.net.www.protocol.http.httpurlconnection.connect(httpurlconnection.java:850) @ sun.net.www.protocol.http.httpurlconnection.getinputstream(httpurlconnection.java:1300) @ com.sun.org.apache.xerces.internal.impl.xmlentitymanager.setupcurrententity(xmlentitymanager.java:637) @ com.sun.org.apache.xerces.internal.impl.xmlentitymanager.startentity(xmlentitymanager.java:1290) @ com.sun.org.apache.xerces.internal.impl.xmlentitymanager.startdtdentity(xmlentitymanager.java:1257) @ com.sun.org.apache.xerces.internal.impl.xmldtdscannerimpl.setinputsource(xmldtdscannerimpl.java:262) @ com.sun.org.apache.xerces.internal.impl.xmldocumentscannerimpl$dtddriver.dispatch(xmldocumentscannerimpl.java:1162) @ com.sun.org.apache.xerces.internal.impl.xmldocumentscannerimpl$dtddriver.next(xmldocumentscannerimpl.java:1050) @ com.sun.org.apache.xerces.internal.impl.xmldocumentscannerimpl$prologdriver.next(xmldocumentscannerimpl.java:964) @ com.sun.org.apache.xerces.internal.impl.xmldocumentscannerimpl.next(xmldocumentscannerimpl.java:606) @ com.sun.org.apache.xerces.internal.impl.xmlnsdocumentscannerimpl.next(xmlnsdocumentscannerimpl.java:117) @ com.sun.org.apache.xerces.internal.impl.xmldocumentfragmentscannerimpl.scandocument(xmldocumentfragmentscannerimpl.java:510) @ com.sun.org.apache.xerces.internal.parsers.xml11configuration.parse(xml11configuration.java:848) @ com.sun.org.apache.xerces.internal.parsers.xml11configuration.parse(xml11configuration.java:777) @ com.sun.org.apache.xerces.internal.parsers.xmlparser.parse(xmlparser.java:141) @ com.sun.org.apache.xerces.internal.parsers.abstractsaxparser.parse(abstractsaxparser.java:1213) @ com.sun.org.apache.xerces.internal.jaxp.saxparserimpl$jaxpsaxparser.parse(saxparserimpl.java:649) @ com.sun.org.apache.xerces.internal.jaxp.saxparserimpl.parse(saxparserimpl.java:333) @ org.eclipse.jetty.xml.xmlparser.parse(xmlparser.java:246) @ org.eclipse.jetty.webapp.descriptor.parse(descriptor.java:65) @ org.eclipse.jetty.webapp.webdescriptor.parse(webdescriptor.java:181) @ org.eclipse.jetty.webapp.metadata.setwebxml(metadata.java:172) @ org.eclipse.jetty.webapp.webxmlconfiguration.preconfigure(webxmlconfiguration.java:60) @ org.eclipse.jetty.webapp.webappcontext.preconfigure(webappcontext.java:455) @ org.eclipse.jetty.webapp.webappcontext.dostart(webappcontext.java:491) @ org.eclipse.jetty.util.component.abstractlifecycle.start(abstractlifecycle.java:69) @ org.eclipse.jetty.util.component.containerlifecycle.start(containerlifecycle.java:117) @ org.eclipse.jetty.util.component.containerlifecycle.dostart(containerlifecycle.java:99) @ org.eclipse.jetty.server.handler.abstracthandler.dostart(abstracthandler.java:60) @ org.eclipse.jetty.util.component.abstractlifecycle.start(abstractlifecycle.java:69) @ org.eclipse.jetty.util.component.containerlifecycle.start(containerlifecycle.java:117) @ org.eclipse.jetty.server.server.start(server.java:355) @ org.eclipse.jetty.util.component.containerlifecycle.dostart(containerlifecycle.java:99) @ org.eclipse.jetty.server.handler.abstracthandler.dostart(abstracthandler.java:60) @ org.eclipse.jetty.server.server.dostart(server.java:324) @ org.eclipse.jetty.util.component.abstractlifecycle.start(abstractlifecycle.java:69)

propably have config in xml files. xml can well-formated or checked against dtd. if dtd resides on internet , don't have connection xmlparser may fail.

could typo in xml config file, because dtd included in jar.


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