OAuthException: Credential could not be refreshed.

This exception happened to a production environment and it has happened again. It happens every now. I retry the operation but sometimes the issue persists.

Here is the error detail and the list of accounts where it happened is sent in a follow-up private email.

com.google.api.ads.common.lib.exception.OAuthException: Credential could not be refreshed.

        at com.google.api.ads.common.lib.auth.OfflineCredentials.generateCredential(OfflineCredentials.java:145)

        at com.bonial.megan.google.adwords.helper.AdwordsBatchJobServiceHelper.connectToGoogleAdwords(AdwordsBatchJobServiceHelper.groovy:91)

        at com.bonial.megan.google.adwords.helper.AdwordsBatchJobServiceHelper.initializeAdWordsSession(AdwordsBatchJobServiceHelper.groovy:62)

        at com.bonial.megan.google.adwords.AdwordsBatchJobService.createAndUploadBatchJobOperations(AdwordsBatchJobService.groovy:32)

        at com.bonial.megan.services.BatchProcessingService.createAndUploadBatchJobOperations(BatchProcessingService.groovy:51)

        at com.bonial.megan.execution.actors.stateChange.mutate.StateChangeMutateActor$_onReceiveBody_closure1.doCall(StateChangeMutateActor.groovy:42)

        at com.bonial.megan.execution.actors.stateChange.mutate.StateChangeMutateActor.onReceiveBody(StateChangeMutateActor.groovy:41)

        at com.bonial.megan.execution.actors.AbstractActor.onReceive(AbstractActor.groovy:42)

        at akka.actor.UntypedActor$$anonfun$receive$1.applyOrElse(UntypedActor.scala:167)

        at akka.actor.Actor$class.aroundReceive(Actor.scala:465)

        at akka.actor.UntypedActor.aroundReceive(UntypedActor.scala:97)

        at akka.actor.ActorCell.receiveMessage(ActorCell.scala:516)

        at akka.actor.ActorCell.invoke_aroundBody0(ActorCell.scala:487)

        at akka.actor.ActorCell$AjcClosure1.run(ActorCell.scala:1)

        at org.aspectj.runtime.reflect.JoinPointImpl.proceed(JoinPointImpl.java:149)

        at akka.kamon.instrumentation.ActorCellInstrumentation$$anonfun$aroundBehaviourInvoke$1.apply(ActorCellInstrumentation.scala:62)

        at kamon.trace.Tracer$.withContext(TracerModule.scala:57)

        at akka.kamon.instrumentation.ActorCellInstrumentation.aroundBehaviourInvoke(ActorCellInstrumentation.scala:61)

        at akka.actor.ActorCell.invoke(ActorCell.scala:483)

        at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:254)

        at akka.dispatch.Mailbox.run(Mailbox.scala:221)

      at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)

        at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)

        at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)

        at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)

Caused by: java.net.ConnectException: Connection refused

        at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:345)

        at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)

        at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)

        at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)

        at java.net.Socket.connect(Socket.java:589)

        at com.google.api.client.http.javanet.NetHttpRequest.execute(NetHttpRequest.java:77)

        at com.google.api.client.http.HttpRequest.execute(HttpRequest.java:972)

        at com.google.api.client.auth.oauth2.TokenRequest.executeUnparsed(TokenRequest.java:283)

        at com.google.api.client.auth.oauth2.TokenRequest.execute(TokenRequest.java:307)

        at com.google.api.client.auth.oauth2.Credential.executeRefreshToken(Credential.java:570)

        at com.google.api.client.googleapis.auth.oauth2.GoogleCredential.executeRefreshToken(GoogleCredential.java:362)

        at com.google.api.client.auth.oauth2.Credential.refreshToken(Credential.java:489)

        at com.google.api.ads.common.lib.auth.OAuth2Helper.callRefreshToken(OAuth2Helper.java:68)

        at com.google.api.ads.common.lib.auth.OfflineCredentials.generateCredential(OfflineCredentials.java:140)

        ... 25 more

Please provide a solution ASAP.

Retrying the operation is a work-around BUT NOT A SOLUTION UNLESS YOU FIX THIS.

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