philixtian opened a new issue, #18139: URL: https://github.com/apache/pulsar/issues/18139
### Search before asking - [X] I searched in the [issues](https://github.com/apache/pulsar/issues) and found nothing similar. ### Version OS: tlinux(CentOS) pulsar-broker-version: pulsar-2.10.0 ### Minimal reproduce step This is a persistent partitioned topic, acctually we made it a delay queue, means that we do not consume msgs and send an ack immediately. After a period of normal operation，some of these partitiones became unhealth. We found those partition's backlog was increasing abnormal, but there wasn't any logs helpful. We tried to clear-backlog for the target subscription of the abnormal partition, the backlog decrease rapidly, but soon became abnormal again, as the following pic.  ### What did you expect to see? All partitiones of these topic became nromal. ### What did you see instead? As I described in "Minimal reproduce step" ### Anything else? _No response_ ### Are you willing to submit a PR? - [ ] I'm willing to submit a PR! -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
