Unable to access ambari cluster and spark history server

.unable to access ambari cluster and spark history server . Ambari cluster issues:- username and password invalid. and spark history server :- err connection refused for port 8080 i suppose.I am on mac so help resolve these issues. I am new to the big data labs and this is first time i tried to access ambari cluster. i have tried past two-three days and was not able to access.

Hi @srikanth2, What is your labs username?

username:- shrikanth

Hi @srikanth2,

this is the URL for spark history server http://gw03.itversity.com:18081/

please try logging into ambari again.