[HIVE-17530] ClassCastException when converting uniontype

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.1.0, 3.0.0
• Fix Version/s: 3.0.0
• Assignee: Anthony Hsu
• Reporter: Anthony Hsu
• Created: 14/Sep/17 02:14
• Updated: 22/May/18 23:12
• Resolved: 18/Sep/17 19:56

Description

To repro:

SET hive.exec.schema.evolution = false;

CREATE TABLE avro_orc_partitioned_uniontype (a uniontype<boolean, string>) PARTITIONED BY (b int) STORED AS ORC;

INSERT INTO avro_orc_partitioned_uniontype PARTITION (b=1) SELECT create_union(1, true, value) FROM src LIMIT 5;

ALTER TABLE avro_orc_partitioned_uniontype SET FILEFORMAT AVRO;

SELECT * FROM avro_orc_partitioned_uniontype;

The exception you get is:

java.io.IOException:org.apache.hadoop.hive.ql.metadata.HiveException: java.lang.ClassCastException: java.util.ArrayList cannot be cast to org.apache.hadoop.hive.serde2.objectinspector.UnionObject

The issue is that StandardUnionObjectInspector was creating and returning an ArrayList rather than a UnionObject.

Issue Links

• links to: https://reviews.apache.org/r/62321/