1. Fix merge on read DAG to make docker demo pass (#2092)

1. Fix merge on read DAG to make docker demo pass (#2092)
2. Fix repeat_count, rollback node

docker/demo/config/test-suite/complex-dag-mor.yaml

@@ -17,7 +17,7 @@ first_insert:
   config:
     record_size: 70000
     num_insert_partitions: 1
-    repeat_count: 5
+    repeat_count: 1
     num_records_insert: 100
   type: InsertNode
   deps: none
@@ -25,7 +25,7 @@ second_insert:
   config:
     record_size: 70000
     num_insert_partitions: 1
-    repeat_count: 5
+    repeat_count: 1
     num_records_insert: 100
   deps: first_insert
   type: InsertNode
@@ -33,7 +33,7 @@ third_insert:
   config:
     record_size: 70000
     num_insert_partitions: 1
-    repeat_count: 2
+    repeat_count: 1
     num_records_insert: 300
   deps: second_insert
   type: InsertNode
@@ -46,7 +46,7 @@ first_upsert:
     record_size: 70000
     num_insert_partitions: 1
     num_records_insert: 300
-    repeat_count: 5
+    repeat_count: 1
     num_records_upsert: 100
     num_upsert_partitions: 10
   type: UpsertNode
@@ -68,7 +68,7 @@ second_upsert:
     record_size: 70000
     num_insert_partitions: 1
     num_records_insert: 300
-    repeat_count: 5
+    repeat_count: 1
     num_records_upsert: 100
     num_upsert_partitions: 10
   type: UpsertNode
@@ -81,11 +81,7 @@ second_hive_query:
       query1: "select count(*) from testdb.table1 group by `_row_key` having count(*) > 1"
       result1: 0
       query2: "select count(*) from testdb.table1"
-      result2: 3100
-      query3: "select count(*) from testdb.table1_rt group by `_row_key` having count(*) > 1"
-      result3: 0
-      query4: "select count(*) from testdb.table1_rt"
-      result4: 3100
+      result2: 1100
   type: HiveQueryNode
   deps: second_upsert
 first_schedule_compact:
@@ -97,7 +93,7 @@ third_upsert:
     record_size: 70000
     num_insert_partitions: 1
     num_records_insert: 300
-    repeat_count: 5
+    repeat_count: 1
     num_records_upsert: 100
     num_upsert_partitions: 10
   type: UpsertNode
@@ -114,6 +110,6 @@ third_hive_query:
       query1: "select count(*) from testdb.table1 group by `_row_key` having count(*) > 1"
       result1: 0
       query2: "select count(*) from testdb.table1"
-      result2: 2210
+      result2: 1400
   type: HiveQueryNode
-  deps: second_upsert
+  deps: first_compact