[PIG-4696] Empty map returned by a streaming_python udf wrongly contains a null key

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.15.0
• Fix Version/s: 0.16.0, 0.15.1
• Component/s: impl
• Assignee: Cheolsoo Park
• Reporter: Cheolsoo Park
• Created: 07/Oct/15 18:30
• Updated: 08/Jun/16 20:48
• Resolved: 08/Oct/15 16:09

Description

To reproduce, please run the following query-

b = FOREACH a GENERATE (map[])udfs.empty_dict();
DUMP b;

where empty_dict() is a Python udf-

@outputSchema("map_out: []")
def empty_dict():
    return {}

This returns ([]) in jython while ([null#]) in streaming_python.