[DRILL-2390] regression: MergeJoinBatch size exceeds 64k limit

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.8.0
• Fix Version/s: 0.8.0
• Component/s: Functions - Drill
• Assignee: Chun Chang
• Reporter: Chun Chang
• Created: 05/Mar/15 22:43
• Updated: 24/Apr/15 22:53
• Resolved: 09/Mar/15 17:49

Description

#Wed Mar 04 01:23:42 EST 2015
git.commit.id.abbrev=71b6bfe

Enable merge join, following query hits the batch size limit issue.

0: jdbc:drill:schema=dfs.drillTestDirComplexJ> alter session set `planner.enable_mergejoin` = true;
+------------+------------+
|     ok     |  summary   |
+------------+------------+
| true       | planner.enable_mergejoin updated. |
+------------+------------+
1 row selected (0.03 seconds)
0: jdbc:drill:schema=dfs.drillTestDirComplexJ> alter session set `planner.enable_hashjoin` = false;
+------------+------------+
|     ok     |  summary   |
+------------+------------+
| true       | planner.enable_hashjoin updated. |
+------------+------------+
1 row selected (0.025 seconds)
0: jdbc:drill:schema=dfs.drillTestDirComplexJ> select count(a.id) from `complex100k.json` a inner join `complex100k.json` b on a.gbyi=b.gbyi;
+------------+
|   EXPR$0   |
+------------+
Query failed: RemoteRpcException: Failure while running fragment., Incoming batch of org.apache.drill.exec.physical.impl.join.MergeJoinBatch has size 3276800, which is beyond the limit of 65536 [ e26545df-a8c3-4cd6-b02a-1872db4ac41f on qa-node120.qa.lab:31010 ]
[ e26545df-a8c3-4cd6-b02a-1872db4ac41f on qa-node120.qa.lab:31010 ]


java.lang.RuntimeException: java.sql.SQLException: Failure while executing query.
	at sqlline.SqlLine$IncrementalRows.hasNext(SqlLine.java:2514)
	at sqlline.SqlLine$TableOutputFormat.print(SqlLine.java:2148)
	at sqlline.SqlLine.print(SqlLine.java:1809)
	at sqlline.SqlLine$Commands.execute(SqlLine.java:3766)
	at sqlline.SqlLine$Commands.sql(SqlLine.java:3663)
	at sqlline.SqlLine.dispatch(SqlLine.java:889)
	at sqlline.SqlLine.begin(SqlLine.java:763)
	at sqlline.SqlLine.start(SqlLine.java:498)
	at sqlline.SqlLine.main(SqlLine.java:460)

This worked before.