gengliangwang edited a comment on issue #25296: [SPARK-28561][WEBUI] DAG viz 
for barrier-execution mode
URL: https://github.com/apache/spark/pull/25296#issuecomment-516869791
 
 
   I think changing the color is helpful. But for users who are not aware of 
this PR, they can be confused about the color. It may take some time to figure 
out that the green color is for barrier mode.
   
   I think we can show the information in the node name as well(we can revise 
the text):
   
   
![image](https://user-images.githubusercontent.com/1097932/62219746-71d04980-b3e1-11e9-9135-2c2a2645a487.png)
   
   
   Or, we can do it via tooptip, showing that it is in barrier-execution mode 
on hovering a green node.

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