see if yarn.timeline-service.store-class is set to org.apache.hadoop.yarn.server.applicationhistoryservice.timeline.LeveldbTimelineStore in yarn-site.xml (and in config on webui).
Should have been set by ambari, if not could be a bug.
see if yarn.timeline-service.store-class is set to org.apache.hadoop.yarn.server.applicationhistoryservice.timeline.LeveldbTimelineStore in yarn-site.xml (and in config on webui).
Should have been set by ambari, if not could be a bug.