script1-hadoop.pig in pig tutorial hangs when run in local mode
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Key: PIG-800
URL: https://issues.apache.org/jira/browse/PIG-800
Project: Pig
Issue Type: Bug
Affects Versions: 0.2.0
Reporter: Alan Gates
Assignee: Alan Gates
Any script of the form
{code}
B = foreach A generate flatten(X); -- X is a bag
C = distinct B;
{code}
where X is sometimes an empty bag will hang in local mode. If distinct is
replaced by order by it will also hang.
The issue is that the flatten in foreach returns STATUS_NULL whenever the bag X
is empty. PODistinct and POSort handle this incorrectly and go into an
infinite loop.
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