hive server security/authentication

[Chalcy Raja]

Using hive server with Tableau now and realize that the user comes in as "hive" 
user.  Also after reading more in the emails and elsewhere and found that hive 
server is not thread safe and does not have way to set up authentication.
How is the connection to hive handled in Tableau, Microstrategy or Pentaho?
Any information is appreciated.
Thanks,
Chalcy