I'm trying to do a UNION on two datasets with identical schemas
(k:bytearray, v:chararray). When using the UNION operator like so:
combined_data = UNION dataset1, dataset2;
I get the following error:
java.lang.RuntimeException: Unexpected data type java.util.ArrayList found in
stream. Note only standard Pig type is supported when you output from
UDF/LoadFunc
Everything works fine if I store the two datasets separately without the
union.
This feels like a bug, but am I doing something wrong here?
Cheers,
-Xavier
