Errors when using Application Default Credentials from within App Engine

[ajkannan]

When using Application Default Credentials from App Engine, both on the local development server (after logging in via gcloud auth login) and in production, I get the following error message:
java.io.IOException: The Application Default Credentials are not available. They are available if running in Google Compute Engine. Otherwise, the environment variable GOOGLE_APPLICATION_CREDENTIALS must be defined pointing to a file defining the credentials. See https://developers.google.com/accounts/docs/application-default-credentials for more information.

Based on that website, it seems like the behavior should be that the SDK credentials are used in the local development server and the App Engine credentials should be provided without setting the GOOGLE_APPLICATION_CREDENTIALS environment variable.

[ajkannan]

Turns out this was a mistake on my part. In our maven project, we took a dependency on the oauth2_http and credentials modules, but not the appengine module.

[anthmgoogle]

OK. It may be worth creating a new issue along the lines of improving the error message in this case.

[aozarov]

@anthmgoogle is there a way to avoid pulling appengine-api-1.0-sdk (17Mb jar) when not necessary.

Few options:

• Use "provided" or a like as a maven dependency
• Use reflection to invoke methods on AppIdentityService

gcloud-java used to do the latter.

[Raviraj20]

Getting an similar error when using an .Net
Can someone help how to solve this error

Message":"An error has occurred.","ExceptionMessage":"The Application Default Credentials are not available. They are available if running in Google Compute Engine. Otherwise, the environment variable GOOGLE_APPLICATION_CREDENTIALS must be defined pointing to a file defining the credentials. See https://developers.google.com/accounts/docs/application-default-credentials for more information.","ExceptionType":"System.InvalidOperationException","StackTrace":" at Google.Api.Gax.TaskExtensions.WaitWithUnwrappedExceptions(Task task)\r\n at Google.Api.Gax.Grpc.ChannelPool.GetChannel(ServiceEndpoint

[ajkannan]

/cc @garrettjonesgoogle

[garrettjonesgoogle]

@Raviraj20 you code looks like C# - did you want https://github.com/googleapis/gax-dotnet ?

[Raviraj20]

@garrettjonesgoogle
ya but that to not working showing an similar error
"ExceptionMessage":"The Application Default Credentials are not available. They are available if running in Google Compute Engine. Otherwise, the environment variable

we cant put the credential file in root folder
*.json

[Raviraj20]

@garrettjonesgoogle
thanks for replying
this https://github.com/googleapis/gax-dotnet this project is not geting open
in vs 2015

geting this error

[Raviraj20]

@garrettjonesgoogle
thanks for replying
this https://github.com/googleapis/gax-dotnet this project is not geting open
its showing a error
this https://github.com/googleapis/gax-dotnet this project is not geting open

[garrettjonesgoogle]

@Raviraj20 , what I meant was that you should file an issue using https://github.com/googleapis/gax-dotnet/issues/new to have the owners of gax-dotnet look at it for you. I can't help you here because this repository is for Java issues.

[Raviraj20]

@garrettjonesgoogle
ok thanks

[randolfo75]

I solved the same problem here running: gcloud auth application-default login. I hope helps somebody.

[chingor13]

The original issue appears to be resolved and it's unclear why it was reopened. Closing this out, but feel free to re-open if this is not the case.