TopicAdminClient UnauthenticatedException When Settings Endpoints

[kamalaboulhosn]

From GoogleCloudPlatform/pubsub#333:

Hi,
I've found an issue when settings TopicAdminClient with endpoint.

Current behavior:

• When i try to set TopicAdminClient with credentials out of a json(String) and endpoint different then the global "pubsub.googleapis.com" end point i get an UnauthenticatedException.
• When i use ADC authentication and set the environment variable GOOGLE_APPLICATION_CREDENTIALS to point to a json file with the same content i can set to all endpoints with no errors.
• When i try to set TopicAdminClient with credentials out of a json(String) and use the global endpoint pubsub.googleapis.com" i get no errors.

Expected behavior:
To be able to use both authentication ways and set any endpoint without encountering any error.

Example:

...
ServiceAccountCredentials cred = ServiceAccountCredentials
              .fromStream(new ByteArrayInputStream(jsonCredentials.getBytes()));  // json as String

CredentialsProvider credentialsProvider = FixedCredentialsProvider.create(cred); 

TopicAdminSettings topicAdminSettings = TopicAdminSettings.newBuilder()
                                 .setCredentialsProvider(credentialsProvider)   // credentials out of given json file
                                 .setEndpoint(endpoint)                         // endpoint different then global endpoint
                                 .build();

TopicAdminClient topicAdminClient = TopicAdminClient.create(topicAdminSettings);

topicAdminClient.getTopic(someTopic);

the code above produce the following exception:
com.google.api.gax.rpc.UnauthenticatedException: io.grpc.StatusRuntimeException: UNAUTHENTICATED: Request had invalid authentication credentials. Expected OAuth 2 access token, login cookie or other valid authentication credential. See https://developers.google.com/identity/sign-in/web/devconsole-project.'

[ozac]

@SimonScholz , how is this PR related to the issue?

[SimonScholz]

@SimonScholz , how is this PR related to the issue?

Sorry @ozac I just corrected the reference. It is not related to this, but to #1504
I guess the auto completion of GitHub lead me to choose the wrong reference.

[kamalaboulhosn]

@benshriki Can you please provide the exact string used for the endpoint?

[hongalex]

Closing since there hasn't been a response from the original issue opener in a while. If you're still having issues, please comment below and we'll reopen this.