Matt Topol created ARROW-12746:
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Summary: [Go][Flight] Client Auth handler overwrites outgoing
metadata
Key: ARROW-12746
URL: https://issues.apache.org/jira/browse/ARROW-12746
Project: Apache Arrow
Issue Type: Bug
Components: FlightRPC, Go
Reporter: Matt Topol
Assignee: Matt Topol
Current version of the Flight Client AuthHandler calls `NewOutgoingMetadata`
instead of `AppendToOutgoingContext` which results in overwriting any metadata
that was being passed in the request. Switching it to `AppendToOutgoingContext`
alleviates the issue by adding the auth header to the metadata without
overwriting any existing metadata.
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