Improved logic for pausing replicated subscription snapshots when no traffic #11922
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merlimat
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rdhabalia,
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merlimat
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Sep 16, 2021
…traffic (#11922) * Improved logic for pausing replicated subscription snapshots when no traffic * Removed unused import * Fixed flaky test ReplicatorTest.testRemoveClusterFromNamespace * Fixed cast that was not available in tests
bharanic-dev
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Mar 18, 2022
…traffic (apache#11922) * Improved logic for pausing replicated subscription snapshots when no traffic * Removed unused import * Fixed flaky test ReplicatorTest.testRemoveClusterFromNamespace * Fixed cast that was not available in tests
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Apr 7, 2022
…traffic (apache#11922) * Improved logic for pausing replicated subscription snapshots when no traffic * Removed unused import * Fixed flaky test ReplicatorTest.testRemoveClusterFromNamespace * Fixed cast that was not available in tests (cherry picked from commit 28a223c)
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Motivation
In #10292, we've added logic to pause the creation of new replicated subscription snapshots when there is no traffic.
Here, I'm changing it to a different approach to avoid a potential issue and to simplify the logic.
Comparing the last message id, we had to use stop taking a snapshot when there are no connected producer, in order to create a "quiet period" and check if the last message id didn't change.
What can happen is that if producers disconnect, we might not create the last snapshot (at least until new producers will get connected).
Modifications
Instead of checking producers and last message id, let's make sure that the last snapshot was initiated after the last "data" message was published. With "data" message here meaning any non-marker message.