yangyichao-mango opened a new issue #3336:
URL: https://github.com/apache/incubator-dolphinscheduler/issues/3336


   **Describe the bug**
   When I create an flink node, it can not be successed add when I do not 
configure it right, but when I add another node(python node), it will cover the 
flink node, but it successfully be left in canvas and can be saved as a new 
process definition.
   
   **To Reproduce**
   Steps to reproduce the behavior:
   1. Add an flink node and do not configure the flink node. Screenshots [1]
   2. Add an python node. Screenshots [2]
   3. Cancel configure python node and the configuration drawler will 
disappear. Screenshots [3]
   4. But the flink node will be left in the canvas
   
   **Expected behavior**
   The flink node will be left in the canvas
   
   **Screenshots**
   [1] 
![image](https://user-images.githubusercontent.com/29545877/88680611-46328d00-d123-11ea-8b4d-a643f8f88467.png)
   [2] 
![image](https://user-images.githubusercontent.com/29545877/88680424-12effe00-d123-11ea-98e7-fcc59e2ab0ba.png)
   [3] 
![image](https://user-images.githubusercontent.com/29545877/88680547-3024cc80-d123-11ea-9711-81270d817c1c.png)
   
   
   **Which version of Dolphin Scheduler:**
    -[dev]
   


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