It looks like we try to talk to the openstack to get vserver information.  However if its not reachable, we get a timeout error.  

However a NPE is shown which I THINK means its still trying to reach out and grab vserver information and not getting a proper value back? Not sure

If we can't reach the OS, then just bail out and move on. 

2018-12-24 18:12:05,233|||discovery-worker-2||||ERROR||||||| AC2002E|AC2002E Error during POST operation to endpoint at url = http://192.168.112.12:5000/v3/auth/tokens with error = java.net.SocketTimeoutException: connect timed out|
2018-12-24 18:12:05,234|||discovery-worker-2||||INFO||||||| AC0003I|AC0003I POST request operation time = 5078 ms for link = [http://192.168.112.12:5000/v3/auth/tokens||http://192.168.112.12:5000/v3/auth/tokens%7C]
2018-12-24 18:12:05,234|||discovery-worker-2||||INFO||||||| AC0004I|AC0004I request at url = http://192.168.112.12:5000/v3/auth/tokens resulted in http response: 500 Internal Server Error|
2018-12-24 18:12:05,234|||discovery-worker-2||||INFO||||||| request at url = http://192.168.112.12:5000/v3/auth/tokens resulted in http response: null
2018-12-24 18:12:05,237|||discovery-worker-2||||ERROR||||||| Failure in resource task
java.lang.NullPointerException: null
at org.onap.sdnc.apps.pomba.networkdiscovery.service.OSAuthentication.getToken(OSAuthentication.java:67)
at org.onap.sdnc.apps.pomba.networkdiscovery.service.SpringServiceImpl$ResourceTask.runResourceDiscoveryTask(SpringServiceImpl.java:199)
at org.onap.sdnc.apps.pomba.networkdiscovery.service.SpringServiceImpl$ResourceTask.run(SpringServiceImpl.java:179)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
2018-12-24 18:12:05,240|||discovery-worker-0||||ERROR||||||| Failure in resource task
java.lang.NullPointerException: null