after installing openfire I try to connect with spark but I get the following error.
org.jivesoftware.smack.SmackException$EndpointConnectionException: Could not lookup the following endpoints: RemoteConnectionEndpointLookupFailure(description='DNS lookup exception for .' exception='java.net.UnknownHostException: .')
at org.jivesoftware.smack.SmackException$EndpointConnectionException.from(SmackException.java:334)
at org.jivesoftware.smack.tcp.XMPPTCPConnection.connectUsingConfiguration(XMPPTCPConnection.java:664)
at org.jivesoftware.smack.tcp.XMPPTCPConnection.connectInternal(XMPPTCPConnection.java:849)
at org.jivesoftware.smack.AbstractXMPPConnection.connect(AbstractXMPPConnection.java:526)
at org.jivesoftware.gui.LoginUIPanel.login(LoginUIPanel.java:1253)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
help me i try ping the server then the server reply but i don’t no what it’s the problem help me .