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Posted to reviews@spark.apache.org by cloud-fan <gi...@git.apache.org> on 2018/08/02 05:56:45 UTC

[GitHub] spark issue #21754: [SPARK-24705][SQL] ExchangeCoordinator broken when dupli...

Github user cloud-fan commented on the issue:

    https://github.com/apache/spark/pull/21754
  
    > For example, in the test of this pr, it sets 3 in ExchangeCoordinator;
    
    How can this happen? Join has 2 children so `ExchangeCoordinator` can at most have 2 exchanges.


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