Writing to HBase from Pig script

[Byte Array <by...@gmail.com>]

Hello!

I successfully read from HBase table using:

table = load 'hbase://temp' using 
org.apache.pig.backend.hadoop.hbase.HBaseStorage('cf:c1, cf:c2', 
'-loadKey true') as (key:chararray, c1:bytearray, c2:bytearray)

I used UDF to parse column data and convert it into doubles from bytearrays.

I do some processing and manage to dump the results:
dump results;

which prints:
((product1-20131231-20100101,1.5,1.5))
((product2-20131231-20100101,2.5,2.5))

However, I cannot write these results into a newly created empty HBase 
table:
copy = store results into 'hbase://results' using 
org.apache.pig.backend.hadoop.hbase.HBaseStorage('cf:res1, cf:res2');

I have also tried .. store results into 'results' using .., but it 
doesn't help.
I am using pig-0.11.0.

I suspect I should do some sort of casting into bytearrays using UDF, 
like I did when reading the table.

This is the exception I get:
java.io.IOException: java.lang.IllegalArgumentException: No columns to 
insert
     at 
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigGenericMapReduce$Reduce.runPipeline(PigGenericMapReduce.java:470)
     at 
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigGenericMapReduce$Reduce.processOnePackageOutput(PigGenericMapReduce.java:433)
     at 
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigGenericMapReduce$Reduce.reduce(PigGenericMapReduce.java:413)
     at 
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigGenericMapReduce$Reduce.reduce(PigGenericMapReduce.java:257)
     at org.apache.hadoop.mapreduce.Reducer.run(Reducer.java:176)
     at 
org.apache.hadoop.mapred.ReduceTask.runNewReducer(ReduceTask.java:650)
     at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:418)
     at 
org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:260)
Caused by: java.lang.IllegalArgumentException: No columns to insert
     at org.apache.hadoop.hbase.client.HTable.validatePut(HTable.java:970)
     at org.apache.hadoop.hbase.client.HTable.doPut(HTable.java:763)
     at org.apache.hadoop.hbase.client.HTable.put(HTable.java:749)
     at 
org.apache.hadoop.hbase.mapreduce.TableOutputFormat$TableRecordWriter.write(TableOutputFormat.java:123)
     at 
org.apache.hadoop.hbase.mapreduce.TableOutputFormat$TableRecordWriter.write(TableOutputFormat.java:84)
     at 
org.apache.pig.backend.hadoop.hbase.HBaseStorage.putNext(HBaseStorage.java:885)
     at 
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigOutputFormat$PigRecordWriter.write(PigOutputFormat.java:139)
     at 
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigOutputFormat$PigRecordWriter.write(PigOutputFormat.java:98)
     at 
org.apache.hadoop.mapred.ReduceTask$NewTrackingRecordWriter.write(ReduceTask.java:588)
     at 
org.apache.hadoop.mapreduce.TaskInputOutputContext.write(TaskInputOutputContext.java:80)
     at 
org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigGenericMapReduce$Reduce.runPipeline(PigGenericMapReduce.java:468)