[HIVE-3872] MAP JOIN for VIEW throws NULL pointer exception error

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Fix Version/s: 0.11.0
• Component/s: Views
• Labels: HINTS MAPJOIN
• Hadoop Flags: Reviewed
• Assignee: Navis Ryu
• Reporter: Santosh Achhra
• Created: 09/Jan/13 09:25
• Updated: 24/Jan/14 17:05
• Resolved: 16/Jan/13 15:48

Description

I have created a view as shown below.

CREATE VIEW V1 AS
select /*+ MAPJOIN(t1) ,MAPJOIN(t2) */ t1.f1, t1.f2, t1.f3, t1.f4, t2.f1, t2.f2, t2.f3 from TABLE1 t1 join TABLE t2 on ( t1.f2= t2.f2 and t1.f3 = t2.f3 and t1.f4 = t2.f4 ) group by t1.f1, t1.f2, t1.f3, t1.f4, t2.f1, t2.f2, t2.f3

View get created successfully however when I execute below mentioned SQL or any SQL on the view get NULLPOINTER exception error

hive> select count from V1;
FAILED: NullPointerException null
hive>

Is there anything wrong with the view creation ?

Next I created view without MAPJOIN hints

CREATE VIEW V1 AS
select t1.f1, t1.f2, t1.f3, t1.f4, t2.f1, t2.f2, t2.f3 from TABLE1 t1 join TABLE t2 on ( t1.f2= t2.f2 and t1.f3 = t2.f3 and t1.f4 = t2.f4 ) group by t1.f1, t1.f2, t1.f3, t1.f4, t2.f1, t2.f2, t2.f3

Before executing select SQL I excute set hive.auto.convert.join=true;

I am getting beloow mentioned warnings
java.lang.InstantiationException: org.apache.hadoop.hive.ql.parse.ASTNodeOrigin
Continuing ...
java.lang.RuntimeException: failed to evaluate: <unbound>=Class.new();
Continuing ...

And I see from log that total 5 mapreduce jobs are started however when don't set auto.convert.join to true, I see only 3 mapreduce jobs getting invoked.
Total MapReduce jobs = 5
Ended Job = 1116112419, job is filtered out (removed at runtime).
Ended Job = -33256989, job is filtered out (removed at runtime).
WARNING: org.apache.hadoop.metrics.jvm.EventCounter is deprecated. Please use org.apache.hadoop.log.metrics.EventCounter in all the log4j.properties files.