[GitHub] [inlong] woofyzhao opened a new pull request, #5057: [INLONG-5055][Dataproxy] Fix pulsar clients np error

[GitBox]

woofyzhao opened a new pull request, #5057:
URL: https://github.com/apache/inlong/pull/5057

   - Fixes #5055
   
   ### Motivation
   
   Data won't send because of pulsar client error:
   
![image](https://user-images.githubusercontent.com/941634/179132910-9bd7ac51-a117-46e7-b142-a201efc37829.png)
   
   Debug and analysis shows that it originates from a NP problem:
   
   
[image](https://user-images.githubusercontent.com/941634/179129971-51c26eb5-0879-437f-b33c-0b2a720f0b4d.png)
   
   ### Modification
   Add guard and use clear instead of setting to null.
   
   
   


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