szkoludasebastian opened a new issue, #22709: URL: https://github.com/apache/pulsar/issues/22709
### Search before asking - [X] I searched in the [issues](https://github.com/apache/pulsar/issues) and found nothing similar. ### Read release policy - [X] I understand that unsupported versions don't get bug fixes. I will attempt to reproduce the issue on a supported version of Pulsar client and Pulsar broker. ### Version Client version: 3.2.2, Server version: 3.2.2 On previous version also notice same behaviour, e.g. 3.1.0, 3.1.2 ### Minimal reproduce step Noticed messages loss when we restart all bookies and brokers during processing the data, so data is send to some topic and then our application consumes messages from topic saves msg payload somewhere and acknowledges messages. To be more precise here are steps: 1. Simulate data streaming - send 1000000 msgs to topic A in some time, e.g. 1000000 msgs in 2 minutes. 2. During the time when messages are sent restart all bookies and brokers at once (in our case we have 8 bookies and 6 brokers). 3. In the same time application is consuming messages from topic A, saves message payload somewhere and after successful save acknowledges messages. ### What did you expect to see? No message loss ### What did you see instead? Some messages are lost. So when we send 1000000 messages, in directory where we store messages we see less than 1000000. We can't specify here how much less, because it is a very random situation. Sometimes we have all the messages, but sometimes something is missing. ### 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: commits-unsubscr...@pulsar.apache.org.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
