codelipenghui opened a new pull request, #25151: URL: https://github.com/apache/pulsar/pull/25151
## Motivation The `resetCursor(long timestamp)` method was not protected by the subscription fencing mechanism (`IS_FENCED_UPDATER`), allowing concurrent reset operations to interfere with one another. This may result in performance degradation during timestamp-based position lookups, particularly when tiered storage is enabled. ## Modifications Apply the same fencing mechanism used by `resetCursor(Position)` to `resetCursor(long timestamp)` by sharing the internal `resetCursorInternal()` method. ## Verifying this change - Added unit test `testConcurrentResetCursorByTimestamp` in `SubscriptionSeekTest.java` - Run: `mvn -pl pulsar-broker -Dtest=SubscriptionSeekTest#testConcurrentResetCursorByTimestamp test` ## Documentation - [x] `doc-not-needed` -- 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]
