Hi @marcos,thanks for your reply. I already did start spark master and spark slave as well. Currently, i try to querying hive table via Superset on bitnami stack for research purpose, which is only worked well for simple query, but always got timeout exception whenever i execute more complex query such as
select sum(salary) from employee group by dept_name. The table itself relatively small, only contains 10-20 rows.
I dont know, i think it just may work if i use spark engine, as theoretically, it faster than mr.