Santosh Achhra created HIVE-3872: ------------------------------------ Summary: MAP JOIN for VIEW thorws NULL pointer exception error Key: HIVE-3872 URL: https://issues.apache.org/jira/browse/HIVE-3872 Project: Hive Issue Type: Bug Components: Views Affects Versions: 0.9.0 Reporter: Santosh Achhra Priority: Critical
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. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira