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https://issues.apache.org/jira/browse/KYLIN-3742?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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XiaoXiang Yu updated KYLIN-3742:
--------------------------------
    Description: 
DataRequest send to Streaming Receiver is cannot be deserialized successfully 
because of 

ParameterDesc's equals method throw a NPE for field null +_colRef._+

 1. This Receiver Server 's error log.

!image-2018-12-26-19-25-31-341.png!

 

 

2. Normal JSON

!image-2018-12-26-19-29-13-404.png!

 

 

3. Spring MVC will try to json string into DataRequest.mertics, it is a Set.

 

!image-2018-12-26-19-38-10-451.png!

 

4. HashSet use equal method to distinct entry. But equals method will throw NPE.

 

!image-2018-12-26-19-39-19-039.png!

  was:
DataRequest send to Streaming Receiver is cannot be deserialized successfully 
because of 

ParameterDesc's equals method throw a NPE for field null +_colRef._+

 

!image-2018-12-26-19-25-31-341.png!

 

 

2. Normal JSON

!image-2018-12-26-19-29-13-404.png!

 

 

3. Spring MVC will try to json string into DataRequest.mertics, it is a Set.

 

!image-2018-12-26-19-38-10-451.png!

 

4. HashSet use equal method to distinct entry. But equals method will throw NPE.

 

!image-2018-12-26-19-39-19-039.png!


> DataRequest fail to deserialized 
> ---------------------------------
>
>                 Key: KYLIN-3742
>                 URL: https://issues.apache.org/jira/browse/KYLIN-3742
>             Project: Kylin
>          Issue Type: Bug
>          Components: Streaming
>            Reporter: XiaoXiang Yu
>            Assignee: XiaoXiang Yu
>            Priority: Critical
>         Attachments: image-2018-12-26-19-25-31-341.png, 
> image-2018-12-26-19-26-44-418.png, image-2018-12-26-19-27-15-397.png, 
> image-2018-12-26-19-29-13-404.png, image-2018-12-26-19-38-10-451.png, 
> image-2018-12-26-19-39-19-039.png
>
>
> DataRequest send to Streaming Receiver is cannot be deserialized successfully 
> because of 
> ParameterDesc's equals method throw a NPE for field null +_colRef._+
>  1. This Receiver Server 's error log.
> !image-2018-12-26-19-25-31-341.png!
>  
>  
> 2. Normal JSON
> !image-2018-12-26-19-29-13-404.png!
>  
>  
> 3. Spring MVC will try to json string into DataRequest.mertics, it is a Set.
>  
> !image-2018-12-26-19-38-10-451.png!
>  
> 4. HashSet use equal method to distinct entry. But equals method will throw 
> NPE.
>  
> !image-2018-12-26-19-39-19-039.png!



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