Not working Login with OpenShift integrated authentication in Jenkins

Issue

• Not showing Login with OpenShift login page on the Jenkins service created from bundled template openshift/jenkins-persistent.

• And we are getting following error messages from the jenkins pod.

Mar 31, 2018 01:01:01 AM org.openshift.jenkins.plugins.openshiftlogin.OpenShiftOAuth2SecurityRealm populateDefaults
INFO: OpenShift OAuth returning false with namespace example-project SA dir null default /run/secrets/kubernetes.io/serviceaccount SA name null default null client ID null default null secret null default ...TOKEN OMITTED... redirect null default null server null default https://openshift.default.svc
Mar 14, 2018 12:44:30 AM org.openshift.jenkins.plugins.openshiftlogin.OpenShiftOAuth2SecurityRealm populateDefaults
INFO: populateDefaults
java.net.UnknownHostException: openshift.default.svc
  at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:184)
  at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
  at java.net.Socket.connect(Socket.java:589)
  at sun.security.ssl.SSLSocketImpl.connect(SSLSocketImpl.java:673)
  at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
  at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
  at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
  at sun.net.www.protocol.https.HttpsClient.<init>(HttpsClient.java:264)
  at sun.net.www.protocol.https.HttpsClient.New(HttpsClient.java:367)
  at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.getNewHttpClient(AbstractDelegateHttpsURLConnection.java:191)
  at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1156)
  at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1050)
  at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(AbstractDelegateHttpsURLConnection.java:177)
  at sun.net.www.protocol.https.HttpsURLConnectionImpl.connect(HttpsURLConnectionImpl.java:162)
  at com.google.api.client.http.javanet.NetHttpRequest.execute(NetHttpRequest.java:93)
  at com.google.api.client.http.HttpRequest.execute(HttpRequest.java:972)
  at org.openshift.jenkins.plugins.openshiftlogin.OpenShiftOAuth2SecurityRealm.getOpenShiftUserInfo(OpenShiftOAuth2SecurityRealm.java:489)
  at org.openshift.jenkins.plugins.openshiftlogin.OpenShiftOAuth2SecurityRealm.populateDefaults(OpenShiftOAuth2SecurityRealm.java:337)
  at org.openshift.jenkins.plugins.openshiftlogin.OpenShiftSetOAuth.setOauth(OpenShiftSetOAuth.java:73)
  at org.openshift.jenkins.plugins.openshiftlogin.OpenShiftPermissionFilter.doFilter(OpenShiftPermissionFilter.java:106)
...