Stackdriver Monitoring exporter exports in the wrong order

[rakyll]

Exporter worker fails with the following stack trace:

Dec 01, 2017 3:02:40 PM io.opencensus.exporter.stats.stackdriver.StackdriverExporterWorkerThread export
WARNING: Exception thrown when exporting TimeSeries.
com.google.api.gax.rpc.InvalidArgumentException: io.grpc.StatusRuntimeException: INVALID_ARGUMENT: One or more TimeSeries could not be written:
Points must be written in order. One or more of the points specified was older than the most recent stored point.: timeSeries[0-2]
at com.google.api.gax.rpc.ApiExceptionFactory.createException(ApiExceptionFactory.java:49)
at com.google.api.gax.grpc.GrpcExceptionCallable$ExceptionTransformingFuture.setException(GrpcExceptionCallable.java:118)
at com.google.api.gax.grpc.GrpcExceptionCallable$ExceptionTransformingFuture.onFailure(GrpcExceptionCallable.java:101)
at com.google.api.core.ApiFutures$1.onFailure(ApiFutures.java:61)
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 io.grpc.stub.ClientCalls$GrpcFuture.setException(ClientCalls.java:491)
at io.grpc.stub.ClientCalls$UnaryStreamToFuture.onClose(ClientCalls.java:466)
at io.grpc.ForwardingClientCallListener.onClose(ForwardingClientCallListener.java:41)
at io.grpc.internal.CensusStatsModule$StatsClientInterceptor$1$1.onClose(CensusStatsModule.java:663)
at io.grpc.ForwardingClientCallListener.onClose(ForwardingClientCallListener.java:41)
at io.grpc.internal.CensusTracingModule$TracingClientInterceptor$1$1.onClose(CensusTracingModule.java:392)
at io.grpc.internal.ClientCallImpl.closeObserver(ClientCallImpl.java:443)
at io.grpc.internal.ClientCallImpl.access$300(ClientCallImpl.java:63)
at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl.close(ClientCallImpl.java:525)
at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl.access$600(ClientCallImpl.java:446)
at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$1StreamClosed.runInContext(ClientCallImpl.java:557)
at io.grpc.internal.ContextRunnable.run(ContextRunnable.java:37)
at io.grpc.internal.SerializingExecutor.run(SerializingExecutor.java:123)
at java.util.concurrent.Executors$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:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: io.grpc.StatusRuntimeException: INVALID_ARGUMENT: One or more TimeSeries could not be written:
Points must be written in order. One or more of the points specified was older than the most recent stored point.: timeSeries[0-2]
at io.grpc.Status.asRuntimeException(Status.java:526)
... 19 more

[songy23]

@rakyll I've seen this error before, this is because there're multiple exporters running at the same time. Please make sure you have only one exporter exporting to a Stackdriver account.

[songy23]

Fixed in #870