Make exception more informative when using FACE_DETECTION in `Feature` list for Video Intelligence API

[jabubake]

v0.21.1-alpha

java.util.concurrent.ExecutionException: com.google.api.gax.grpc.GrpcApiException: io.grpc.StatusRuntimeException: INVALID_ARGUMENT: Request contains an invalid argument.

is the non-informative response.
Here is the code used to test.

I noticed REST API reference does not list FACE_DETECTION.

@lesv @gguuss

[jabubake]

It seems this feature requires being whitelisted. It would be great if we could provide a more informative exception here or document this given Feature.FACE_DETECTION is in the library.

[garrettjonesgoogle]

So is the server itself returning INVALID_ARGUMENT with the message "Request contains an invalid argument."? If so, we don't have much information to work with at the client library level.

[jabubake]

That is unfortunate, should I move this issue to googleapis ?

[garrettjonesgoogle]

googleapis probably isn't quite the right place - we may have a platform-wide issue with out whitelisted features are treated. I've seen other whitelisted APIs throw uninformative exceptions too.

[yihanzhen]

This has been added to our feature backlog: https://github.com/GoogleCloudPlatform/google-cloud-java/wiki/Feature-backlog . This issue will be closed but is linked in the backlog and can continue to be used for comment and discussion.