fix(pubsub): prevent draining error return for Receive #4733
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In
receive_scheduler.go
, adding a new message after the context passed intoReceive
is cancelled will result in a library-defineddraining
error. This is poor behavior as the condition which this happens is out of the user's control (simultaneousShutdown
+ReceiveScheduler.Add()
). This PR mitigates this byIn addition, since it's unlikely for messages to be added, this PR also removes the draining error entirely and allows messages to be added. This is very unlikely and is still preferable to surfacing an unactionable error to the user.
Fixes #4718