For question 1, if hive.server2.enable.doAs is set to true, the AppMaster fails to connect to LLAP daemons (from my experiments).
--- Sungwoo On Fri, May 18, 2018 at 1:02 AM, Sungwoo Park <glap...@gmail.com> wrote: > Hello, > > I have a couple of questions on LLAP and hive.server2.enable.doAs. I've > learned that LLAP does not support hive.server2.enable.doAs=true, but > what if we disable LLAP IO? If LLAP IO is disabled and no cache is used in > LLAP daemons, I guess it should be okay to allow > hive.server2.enable.doAs=true because no data is shared between different > queries inside LLAP daemons. > > So, my questions are: > > 1. Does LLAP always disallow hive.server2.enable.doAs=true, whether LLAP > IO is enabled or not? > 2. If LLAP disallows hive.server2.enable.doAs=true even when LLAP IO is > disabled (i.e., when cache size is set to zero), why? > > From my own experiments, LLAP runs fast enough even without LLAP IO. In > such scenarios, setting hive.server2.enable.doAs=true can be useful. > > Thanks in advance. > > --- Sungwoo >
