Upgrading to a newer version of Impala will solve most scalability issues that you'd see on Impala 2.9, mostly because of https://blog.cloudera.com/scalability-improvement-of-apache-impala-2-12-0-in-cdh-5-15-0/. ... View more

When you are passing your truststore make sure that the truststore consist of the Client hosts that are comminucating with your HiveServer2.   It is always safe to have 10 nodes then its good to have the list of hosts(Or Aliases) trusted in your Truststore.   ... View more

You don't need to take down the other masters, but need to establish a maintenance window (no DDLs) to ensure the table metadata is consistent between followers and the leader. If it is hard in production, alternative is to ensure the master to be taken down is not the leader (to avoid lose data). ... View more

Thanks again this seemed to have fixed the issue I am going through most of the tables as it looks like a few of them are still trying to talk to the old UUID.  ... View more

So I have been doing some testing today and I noticed that once I disable impersonation I am able to run queries in hue via the impala editor (not sure if ldap is in action here) BUT I am unable to access impala via the command line. Maybe Hue may needs Sentry after all?   Side note authorized_prozy_user_config flag is still blank in the impalad startup so if any has ldap working with hue and impala I would be insterested in seeing what yours looks like.  ... View more