RockteMQ-AI commented on issue #11191: URL: https://github.com/apache/rocketmq/issues/11191#issuecomment-5758003031
**Issue Evaluation** Category: `type/bug` | Status: **Confirmed** The root cause is clearly identified: a lite topic is recorded in the per-request dedup set before it is actually handled. When FIFO-blocked and then re-dispatched (via ack unblock) within the same pull, the re-dispatched event is treated as a duplicate and silently dropped. This causes message loss for the affected lite topic. **Impact:** Lite topic consumers with FIFO ordering can lose messages when multiple lite topics are subscribed and events are re-dispatched during a single pull cycle. **Severity:** Medium-High — data loss in ordered consumption scenarios. PR [#11192](https://github.com/apache/rocketmq/pull/11192) is already opened by the reporter with a fix. --- *Automated evaluation by RockteMQ-AI* -- 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]
