Rohini Palaniswamy created PIG-5363:

             Summary: Use 1-1 edge vertex group in union
                 Key: PIG-5363
             Project: Pig
          Issue Type: Improvement
            Reporter: Rohini Palaniswamy

TEZ-3983 fixes vertex groups to work properly with 1-1 edges. So we should 
switch to that instead of  using unordered partitioned shuffle edge in 
 The current logic of partitioning based on hashcode of values is slightly 
expensive. For backward compatibility with older Tez versions, have to support 
both modes possibly via configuration setting or Tez version check.

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