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https://issues.apache.org/jira/browse/ARROW-10460?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17224783#comment-17224783
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David Li commented on ARROW-10460:
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[~carlomazzaferro] how is the server implemented (C++/Python/Java)?
Can you run the client with these env vars to debug what's happening? {{env
GRPC_VERBOSITY=debug GRPC_TRACE=channel,http python ...}}
> FlightRPC authentication mechanism changed and is undocumented, breaking
> current working code
> ---------------------------------------------------------------------------------------------
>
> Key: ARROW-10460
> URL: https://issues.apache.org/jira/browse/ARROW-10460
> Project: Apache Arrow
> Issue Type: Bug
> Components: FlightRPC, Python
> Affects Versions: 2.0.0
> Environment: MacOS Catalina, python 3.7.4
> Reporter: Carlo Mazzaferro
> Priority: Major
> Fix For: 1.0.1
>
>
> Authentication with FlightClient changed from version 1.0.1 to 2.0.0 and is
> undocumented.
>
> {{>>> from pyarrow import ___version___}}
> {{>> print(}}_{{_version}}_{{_)}}
> {{'1.0.1'}}
> {{>>> from handlers import ApiKeyClientAuthHandler # custom handler}}}}
> {{>>> from pyarrow.flight import FlightClient}}
> {{>>> client = FlightClient(location="grpc+tcp://xxxxxxxxxx.com")}}
> {{>>> client.authenticate(ApiKeyClientAuthHandler(api_key="xxxxx"))}}
> {{>>>}}
>
> And the exact same code in 2.0.0 breaks
>
> {{>>> from pyarrow import ___version___}}
> {{>> print(}}_{{_version}}_{{_)}}
> {{'2.0.0'}}
> {{>>> from handlers import ApiKeyClientAuthHandler # custom handler}}}}
> {{>>> from pyarrow.flight import FlightClient}}
> {{>>> client = FlightClient(location="grpc+tcp://xxxxxxxxxx.com")}}
> {{>>> client.authenticate(ApiKeyClientAuthHandler(api_key="xxxxx"))}}
> {{Traceback (most recent call last):}}
> {{ File "scratch.py", line 15, in <module>}}
> {{ client.authenticate(ApiKeyClientAuthHandler(api_key="xxxxxxxxxx"))}}
> {{ File "pyarrow/_flight.pyx", line 1149, in
> pyarrow._flight.FlightClient.authenticate}}
> {{ File "pyarrow/_flight.pyx", line 70, in
> pyarrow._flight.check_flight_status}}
> {{pyarrow._flight.FlightUnavailableError: gRPC returned unavailable error,
> with message: failed to connect to all addresses}}
>
> What happened?
>
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