Ted-Jiang opened a new issue #1770:
URL: https://github.com/apache/arrow-datafusion/issues/1770


   **Is your feature request related to a problem or challenge? Please describe 
what you are trying to do.** 
   Separate cpu-bound (query-execution) and IO-bound(heartbeat) work in diff 
tokio runtime like 
   @alamb  Thanks for your awesome blog 😊😊😊
   
https://thenewstack.io/using-rustlangs-async-tokio-runtime-for-cpu-bound-tasks/
    
   **Describe the solution you'd like**
   A clear and concise description of what you want to happen.
   
   **Describe alternatives you've considered**
   A clear and concise description of any alternative solutions or features 
you've considered.
   
   **Additional context**
   tokio::spawn is conceptually same as thread::spawn. Like threads, force 
shutdown tasks externally is not supported.  Use separate runtime can support 
cancel SQL or cancel Job more easily in #1701.
   


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