I have the following issue with this setup . .I define Livy service on a Knox topology with authentication provider enabled .  When  I request the Livy session over Knox url Knox requests  the Livy session with doAs  =  myuser . So far so good. ..  Livy sessions is started with owner=Knox and  proxyuser =myuser..  Problem is when we attempt to post to Livy statements API  over the Knox url.  If we use the Knox url for posting to the running Livy session  Knox will add the doAs=myuser . But now  we get a forbidden response . Basically because the Livy session is owned by Knox we cannot post statement into the session over the Knox url with doAs=myuser . in my setup at least only the Knox user may post a statement  to a Livy session owned by Knox .  ... View more

The amount of memory needed by Ambari Infra Solr by default is too high due to poor configuration choices. I wrote about what simple changes can be made to make Solr significantly more performant on less heap. We have Solr with less than 4GB of heap holding billions of documents. https://risdenk.github.io/2017/12/18/ambari-infra-solr-ranger.html ... View more

Good catch. Tutorial has been updated to provide more links. ... View more