Github user bzz commented on the issue:
https://github.com/apache/zeppelin/pull/1170
While running locally I got:
```
ERROR [2016-07-29 15:05:09,591] ({pool-2-thread-2}
BigQueryInterpreter.java[open]:142) - Cannot open connection
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.
at
com.google.api.client.googleapis.auth.oauth2.DefaultCredentialProvider.getDefaultCredential(DefaultCredentialProvider.java:95)
at
com.google.api.client.googleapis.auth.oauth2.GoogleCredential.getApplicationDefault(GoogleCredential.java:213)
at
org.apache.zeppelin.bigquery.BigQueryInterpreter.createAuthorizedClient(BigQueryInterpreter.java:155)
at
org.apache.zeppelin.bigquery.BigQueryInterpreter.open(BigQueryInterpreter.java:138)
at
org.apache.zeppelin.interpreter.LazyOpenInterpreter.open(LazyOpenInterpreter.java:69)
at
org.apache.zeppelin.interpreter.LazyOpenInterpreter.interpret(LazyOpenInterpreter.java:93)
at
org.apache.zeppelin.interpreter.remote.RemoteInterpreterServer$InterpretJob.jobRun(RemoteInterpreterServer.java:383)
at org.apache.zeppelin.scheduler.Job.run(Job.java:176)
at
org.apache.zeppelin.scheduler.FIFOScheduler$1.run(FIFOScheduler.java:139)
at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:178)
at
java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:292)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:744)
INFO [2016-07-29 15:05:09,593] ({pool-2-thread-2}
BigQueryInterpreter.java[close]:281) - Close bqsql connection!
```
@babupe do you think it would make sense to expose this though interpreter
configuration properties, same as `project id`, so people could override it? Or
may be it would be easier to use OAuth service account?
In any way, we need to document this properly for people to know that there
are
[pre-requests](https://developers.google.com/identity/protocols/application-default-credentials),
before using this interpreter.
I will submit the PR with docs
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