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Hello, community!
I'm facing an issue with Pub/Sub subscription metrics (Push delivery type with Write to BigQuery). Specifically, I see unacked messages in some subscriptions, even though all other metrics indicate normal behavior. I can't figure out why these unacknowledged messages exist or what causes them.
For example, one of my subscriptions is configured as follows:
Unacked messages metric (last 6 hours):
Delivery metrics and Delivery latency health score (last 6 hours):
Based on these metrics, there shouldn't be any unacknowledged messages — every message appears to be acknowledged.
Could anyone share insights on potential reasons for this? Is this an expected behavior under certain conditions, or could it be a bug? Any guidance on troubleshooting or relevant documentation would be greatly appreciated.
Thank you in advance.
