I am using HDP2.4 sandbox and I have a Hive external table on top of HBase, my application suppose to load data from Hive. Below JRuby program runs once in a day to give me custom filter on my INT column values. import org.apache.hadoop.hbase.HBaseConfiguration
import org.apache.hadoop.hbase.client.HTable
import org.apache.hadoop.hbase.client.Get
import org.apache.hadoop.hbase.util.Bytes
import org.apache.hadoop.hbase.client.Scan;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.hadoop.hbase.client.ResultScanner;
import org.apache.hadoop.hbase.client.Result;
import java.util.ArrayList;
def delete_get_some()
var_table = "tiny_hbase_table1"
htable = HTable.new(HBaseConfiguration.new, var_table)
rs = htable.getScanner(Bytes.toBytes("o"), Bytes.toBytes("kingdomKey"))
output = ArrayList.new output.add "ROW\t\t\t\t\t\tCOLUMN\+CELL"
rs.each { |r| r.raw.each { |kv|
row = Bytes.toInt(kv.getRow)
fam = kv.getFamily
ql = Bytes.toString(kv.getQualifier)
ts = kv.getTimestamp
val = Bytes.toInt(kv.getValue)
rowval = Bytes.toInt(kv.getRow)
output.add "#{row} #{ql} #{val}"
}
}
output.each {|line| puts "#{line}\n"}
end
delete_get_some
But i am getting "NoMethodError: undefined method `add' for nil:NilClass" error while running this program. Suggestions or advice please on this issue...
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