1. ix bugs in query layer. 2. remove some redundant code in BE 3. support specify multi helper node when starting FE 4. add proc 'cluster_load_statistic' to show load balance situation of Palo
1. ix bugs in query layer. 2. remove some redundant code in BE 3. support specify multi helper node when starting FE 4. add proc 'cluster_load_statistic' to show load balance situation of Palo