columns has 2 elements while hbase.columns.mapping has 3 elements error while creating hive table from hbase

Question

I'm getting following error when I run the below command for creating hive table.

sample is my hive table I'm trying to create. hloan is my existing hbase table. Please help.

create external table sample(id int, name string)
STORED BY 'org.apache.hadoop.hive.hbase.HBaseStorageHandler' 
WITH SERDEPROPERTIES("hbase.columns.mapping"=":key,hl:id,hl:name") 
TBLPROPERTIES ("hbase.table.name"="hloan","hbase.mapred.output.outputtable"="sample");

ERROR:

FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.DDLTask. java.lang.RuntimeException: MetaException(message:org.apache.hadoop.hive.serde2.SerDeException org.apache.hadoop.hive.hbase.HBaseSerDe: columns has 2 elements while hbase.columns.mapping has 3 elements (counting the key if implicit))

Answer 1

As error describes your create external table statement having 2 columns id,name.

In Hbase mapping you are having 3 columns :key,hl:id,hl:name

Create table with 3 columns:

hive> create external table sample(key int, id int, name string)
STORED BY 'org.apache.hadoop.hive.hbase.HBaseStorageHandler' 
WITH SERDEPROPERTIES("hbase.columns.mapping"=":key,hl:id,hl:name") 
TBLPROPERTIES ("hbase.table.name"="hloan","hbase.mapred.output.outputtable"="hloan");

(or)

if key and id columns having same data then you can skip hl:id in mapping.

Create table with 2 columns:

hive> create external table sample(id int, name string)
STORED BY 'org.apache.hadoop.hive.hbase.HBaseStorageHandler' 
WITH SERDEPROPERTIES("hbase.columns.mapping"=":key,hl:name") 
TBLPROPERTIES ("hbase.table.name"="hloan","hbase.mapred.output.outputtable"="hloan");