[jira] [Created] (PIG-5209) Cross product on flatten(map) fails with ClassCastException

["Koji Noguchi (JIRA)" <ji...@apache.org>]

Koji Noguchi created PIG-5209:
---------------------------------

             Summary: Cross product on flatten(map) fails with ClassCastException
                 Key: PIG-5209
                 URL: https://issues.apache.org/jira/browse/PIG-5209
             Project: Pig
          Issue Type: Bug
          Components: impl
            Reporter: Koji Noguchi
            Assignee: Koji Noguchi
            Priority: Minor


This issue started after we added a new flatten on map feature at PIG-5085.

For script like 
{code}
B = foreach A GENERATE FLATTEN(map1), FLATTEN(map2);
{code}

it fails with 
{noformat}
Caused by: java.lang.ClassCastException: java.util.HashMap cannot be cast to org.apache.pig.data.DataBag
    at org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POForEach.processPlan(POForEach.java:514)
    at org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POForEach.getNextTuple(POForEach.java:233)
    ... 12 more
{noformat}



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