codelipenghui opened a new issue #5377: Old message continue redeliver after clear backlog. URL: https://github.com/apache/pulsar/issues/5377 **Describe the bug** We have some messages can't be consume correctly, so i clear the backlog of that subscription, but message redelivery did not stop. **To Reproduce** Steps to reproduce the behavior: 1. Producer send some messages 2. Consumer receive messages but do not ack them 3. Clear backlog of the subscription which consume use 4. un-acked messages will redeliver continuously **Expected behavior** Don't redeliver messages which is less than mark delete position
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