Hi, After I have upgraded to CM/CDH 6.1 from 5.16.1, my hosts randomly and periodically having "Unknown Health" for about a few seconds and then go back to green. I have not seen/found any WARNING nor any ERROR in any logs from hosts or any services. The entire cluster works without any issue, I have run host inspection and network inspection without any problem. Also, synced time/date a few times just in case but still I can watch my hosts (also services because of the hosts) going grey with "Unknown Health" and back to green randomly for few seconds.   Cloudera Management Service is on one server with 14 cores and 28G memory. I have checked this server activity, it is pretty idle, so the cluster is not a busy cluster. Either way, this is the heap size for the monitorings: Java Heap Size of Activity Monitor in Bytes: 2GB Java Heap Size of Alert Publisher in Bytes: 256MB Java Heap Size of EventServer in Bytes: 1GB Java Heap Size of Host Monitor in Bytes: 4GB Java Heap Size of Service Monitor in Bytes: 4GB Maximum Non-Java Memory of Host Monitor: 8GB Maximum Non-Java Memory of Service Monitor: 12GB     Do you guys have any advice on how to diagnose the possible issue?     Many thanks. ... View more

Hi,   I have upgraded my CM/CDH to 6.1 and every time I login into Hue I receive this error:   Solr server could not be contacted properly: HTTPConnectionPool(host='localhost', port=8983): Max retries exceeded with url: /solr/admin/info/system?user.name=hue&doAs=mpanahi&wt=json (Caused by NewConnectionError(': Failed to establish a new connection: [Errno 111] Connection refused',))   The problem is I have never had Solr installed nor configured inside Hue. The Solr is None in Hue inside CM and there is no such thing that refers to [search] or [dashboard] inside my hue_safety_valve.ini so I don't know why it tries to connect to something without me setting it up.   Does anyone have any idea why in the new Hue it tries to connect to Solr without being it installed or selected?   Many thanks,   ... View more