Hi Akhil, updated the yarn.admin.acl with yarn,spark and restarted all required components. But still facing the same issue. This time if I click on application master. Even resource manager UI is not opening for some time. resource manager lists below log for many times. 2018-08-28 06:24:17,048 INFO webproxy.WebAppProxyServlet (WebAppProxyServlet.java:doGet(370)) - dr.who is accessing unchecked http://111.11.1.11:58944 which is the app master GUI of application_1535435544017_0008 owned by spark ... View more