Unknown host exception

java.net.UnknownHostException: hostname: hostname
      at java.net.InetAddress.getLocalHost(Unknown Source)
      at org.codehaus.xfire.addressing.RandomGUID.(RandomGUID.java:115)
      at org.codehaus.xfire.addressing.AddressingInHandler.(AddressingInHandler.java:26)
      at java.lang.Class.forName0(Native Method)
      at java.lang.Class.forName(Unknown Source)
      at org.codehaus.xfire.client.CorrelatorHandler.class$(CorrelatorHandler.java:14)
      at org.codehaus.xfire.client.CorrelatorHandler.(CorrelatorHandler.java:24)
      at org.codehaus.xfire.client.Client.(Client.java:84)
      at org.codehaus.xfire.client.Client.(Client.java:180)
      at org.codehaus.xfire.client.Client.(Client.java:125)
      at org.codehaus.xfire.client.XFireProxyFactory.create(XFireProxyFactory.java:78)
      at com.soasta.common.xfire.ClientFactory.getClient(ClientFactory.java:120)
      at com.soasta.common.coordinator.webservice.CoordinatorServiceClientFactory.getCoordinatorServiceClient(CoordinatorServiceClientFactory.java:41)
      at com.soasta.common.coordinator.webservice.CoordinatorServiceClientFactory.getCoordinatorServiceClient(CoordinatorServiceClientFactory.java:36)
      at com.soasta.conductor.install.InstallerUtility.autoRegisterConductor(InstallerUtility.java:189)
      at I4jScript_Internal_148.eval(I4jScript_Internal_148.java:214)
      at I4jScript_Internal_148.evaluate(I4jScript_Internal_148.java:325)
      at com.install4j.runtime.installer.helper.Script.evaluate(Unknown Source)
      at com.install4j.runtime.installer.ContextImpl.runScript(Unknown Source)
      at com.install4j.runtime.installer.ContextImpl.runBooleanScript(Unknown Source)
      at com.install4j.runtime.installer.frontend.headless.ConsoleScreenExecutor.handleScreen(Unknown Source)
      at com.install4j.runtime.installer.frontend.headless.AbstractHeadlessScreenExecutor.execute(Unknown Source)
      at com.install4j.runtime.installer.controller.Controller$1.run(Unknown Source)
      at java.awt.event.InvocationEvent.dispatch(Unknown Source)
      at java.awt.EventQueue.dispatchEvent(Unknown Source)
      at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
      at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
      at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
      at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
      at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
      at java.awt.EventDispatchThread.run(Unknown Source)
Error attempting to connect. java.lang.NullPointerException