pubsub: undelivered messages never pulled #525
Labels
api: pubsub
Issues related to the Pub/Sub API.
priority: p1
Important issue which blocks shipping the next release. Will be fixed prior to next release.
type: bug
Error or flaw in code with unintended results or allowing sub-optimal usage patterns.
This is happen several times in my case, when I ran several pulls concurrently each with different topics. The undelivered messages just stay in there although i've tried to restart the subscription or making a new one. The strange thing is when there are new messages sent to the topic, the iterator start pulling again. But those remaining messages just still there and never get pulled. Also, the undelivered messages count has peculiarity, it is always even, for example 500, 1000, 2000. Bellow attached a screenshot from StackDriver of this problem. I'm using commit
6521623
(undelivered messages metrics)
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