PERMISSION_DENIED for google service account

I’ve successfully subscribed to Pub?Sub service under my own user account. Howewer when i set GOOGLE_APPLICATION_CREDENTIALS env variable to point service account key file i got permission denied exception. This service account has Pub/Sub Admin role. Here is stack trace of exception:

SEVERE: terminated streaming with exception
com.google.api.gax.rpc.PermissionDeniedException: io.grpc.StatusRuntimeException: PERMISSION_DENIED: User not authorized to perform this action.
	at com.google.api.gax.rpc.ApiExceptionFactory.createException(ApiExceptionFactory.java:55)
	at com.google.cloud.pubsub.v1.StreamingSubscriberConnection$1.onFailure(StreamingSubscriberConnection.java:237)
	at com.google.common.util.concurrent.Futures$4.run(Futures.java:1123)
	at com.google.common.util.concurrent.MoreExecutors$DirectExecutor.execute(MoreExecutors.java:435)
	at com.google.common.util.concurrent.AbstractFuture.executeListener(AbstractFuture.java:900)
	at com.google.common.util.concurrent.AbstractFuture.complete(AbstractFuture.java:811)
	at com.google.common.util.concurrent.AbstractFuture.setException(AbstractFuture.java:675)
	at com.google.common.util.concurrent.SettableFuture.setException(SettableFuture.java:53)
	at com.google.cloud.pubsub.v1.StreamingSubscriberConnection$StreamingPullResponseObserver.onError(StreamingSubscriberConnection.java:173)
	at io.grpc.stub.ClientCalls$StreamObserverToCallListenerAdapter.onClose(ClientCalls.java:419)
	at io.grpc.ForwardingClientCallListener.onClose(ForwardingClientCallListener.java:41)
	at io.grpc.internal.CensusStatsModule$StatsClientInterceptor$1$1.onClose(CensusStatsModule.java:684)
	at io.grpc.ForwardingClientCallListener.onClose(ForwardingClientCallListener.java:41)
	at io.grpc.internal.CensusTracingModule$TracingClientInterceptor$1$1.onClose(CensusTracingModule.java:392)
	at io.grpc.internal.ClientCallImpl.closeObserver(ClientCallImpl.java:475)
	at io.grpc.internal.ClientCallImpl.access$300(ClientCallImpl.java:63)
	at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl.close(ClientCallImpl.java:557)
	at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl.access$600(ClientCallImpl.java:478)
	at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$1StreamClosed.runInContext(ClientCallImpl.java:590)
	at io.grpc.internal.ContextRunnable.run(ContextRunnable.java:37)
	at io.grpc.internal.SerializingExecutor.run(SerializingExecutor.java:123)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)
Caused by: io.grpc.StatusRuntimeException: PERMISSION_DENIED: User not authorized to perform this action.
	at io.grpc.Status.asRuntimeException(Status.java:526)
	... 19 more

[agzamovr]

No, we have decided to use RabbitMQ instead.

[PrashSi]

I am also facing the same problem in production and with selective hosts. I am using the same JSON(service account credentials) on 30 different hosts and 3 of them have reported this error. This is a runtime error with a generic message. Please suggest a way to debug it.