[GitHub] tez issue #33: TEZ-3998: support constructing DAG with concurrent edge

[yingdachen]

Github user yingdachen commented on the issue:

    https://github.com/apache/tez/pull/33
  
    for the latest patch
    
    1. address previous code review comments
    2. add check in DAGAppMaster, for a DAG with concurrent edge, disable 
recovery (enforce the recovered DAG to run from scratch in case of AM 
failover). We will tackle proper failover strategy for a DAG with concurrent 
edge in TEZ-4017.


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