[GitHub] [arrow] aiguofer commented on issue #33953: [Java] JDBC driver does not send custom headers on DoGet

["aiguofer (via GitHub)" <gi...@apache.org>]

aiguofer commented on issue #33953:
URL: https://github.com/apache/arrow/issues/33953#issuecomment-1411497672

   Ok so this one is a little bit beyond me as I'm not very familiar with gRPC but I believe the problem lies in `FlightClient.interceptedChannel`. 
   
   The handshake and sql info methods both use `CallOptions.wrapStub(blockingStub, options).get<method>`, which internally uses the `Channel` on the stub. `getStream` however, uses the `interceptedChannel`. If I replace it with `CallOptions.wrapStub(asyncStub, options).getChannel()` it seems to send the headers along, see: [this commit](https://github.com/apache/arrow/commit/3684280b8c844242b44894cd84e670ae0cd71df1)
   
   There's a few other methods in the `FlightClient` that use the `interceptedChannel` so those might also be worth a look. 
   
   BTW, https://github.com/apache/arrow/issues/33839 might be the same issue based on these findings.


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