capacman opened a new issue #9400:
URL: https://github.com/apache/arrow/issues/9400


   Hi,
   I am new to rust so my question can be nonsense so thank you for your 
patience in advance. I am trying implement a small single node query service 
and it will return its data over grpc(not flight). When i try to use execution 
context and dataframe api behind a tonic service,compiler gives error:
   the trait `Sync` is not implemented for `dyn 
datafusion::dataframe::DataFrame`
   as i understand all futures should be sync+send for tonic and currently 
dataframe api is not sync+send. Are there any plans to make it sync+send? Or 
should i look for other ways to implement it?Currently i am using this method
   
https://docs.rs/tokio/1.1.1/tokio/task/struct.LocalSet.html#use-inside-tokiospawn
   


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