pubsub async subscriber listener logging error on stop

I have the same situation as described in #2485. Using version 0.26.0.

A listener for failed state is logging an error message when stopping an async subscriber:

java.util.concurrent.RejectedExecutionException: Task java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask@779f4acb rejected from java.util.concurrent.ScheduledThreadPoolExecutor@7fb36e19[Terminated, pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 41]

Although this error is described as harmless in the referenced issue, it pollutes our logs during shutdown and deployments. The only seam I can find is detect if the from state is STOPPING, and ignore any failure. But I feel like this would potentially miss real errors if they were to occur during shutdown.

Are there any suggested ways to better handle this?

[pongad]

I found the problem. I’ll put the diagnosis in the PR description.

[rcoy-v]

@pongad Is there a timeframe when this fix will be available? 1.16.0 of gax-java is still not used in a released version of pubsub, unless I’m mistaken. It seems I should not explicitly use a different version of gax-java that is out of step with google-cloud-java either.