Got Internal error: IDB-2004: Cannot connect to ExeMgr. when run query

Got Internal error: IDB-2004: Cannot connect to ExeMgr. when run query
select record_id,count from record where record_time>='2017-02-18 00:00:00' and record_time<'2017-02-19 00:00:00' group by record_id having count>1;