I'm running a kerberized HDP cluster and am unable to access the Workflow Manager view because the Oozie check is failing.
Looking at the Workflow Manager view logs (/var/log/ambari-server/wfmanager-view/wfmanager-view.log), I can see that a null pointer exception is thrown after the oozie admin URL is attempted to be accessed:
02 Apr 2017 18:33:41,326 INFO [main] [ ] OozieProxyImpersonator:111 - OozieProxyImpersonator initialized for instance: WORKFLOW_MANAGER_VIEW
02 Apr 2017 18:35:13,927 INFO [ambari-client-thread-85] [WORKFLOW_MANAGER 1.0.0 WORKFLOW_MANAGER_VIEW] OozieDelegate:149 - Proxy request for url: [GET] http://hdp1.woolford.io:11000/oozie/v1/admin/configuration
02 Apr 2017 18:35:14,163 ERROR [ambari-client-thread-85] [WORKFLOW_MANAGER 1.0.0 WORKFLOW_MANAGER_VIEW] OozieProxyImpersonator:484 - Error in GET proxy
I'm able to access the Oozie web UI and the admin configuration URL (http://hdp1.woolford.io:11000/oozie/v1/admin/configuration) in a browser, and so it appears that Oozie is working, e.g.
I'm not sure if it's relevant to this issue, but the Oozie user can impersonate any user from any host (from core-site.xml):
Can you see what I'm doing wrong? Is there any other relevant information I should add to this question?