Aias00 opened a new issue, #6785:
URL: https://github.com/apache/shenyu/issues/6785

   - Severity: Medium
   - Location:
   
`shenyu-sync-data-center/shenyu-sync-data-websocket/src/main/java/org/apache/shenyu/plugin/sync/data/websocket/WebsocketSyncDataService.java:110`
 (`timer = WheelTimerFactory.getSharedTimer()`), `:178` (`timer.shutdown()`)
   - 
   Description:
   `close()` calls `timer.shutdown()` where `timer` is the JVM-wide singleton 
`Timer` from `WheelTimerFactory.getSharedTimer()`. The same shared timer is 
used by `FailbackRegistryRepository` (`FailbackRegistryRepository.java:50: 
this.timer = WheelTimerFactory.getSharedTimer()`). Shutting down the shared 
timer destroys the registration retry mechanism for all components that depend 
on it.
   - 
   Impact:
   If `WebsocketSyncDataService` is destroyed without full application shutdown 
(bean refresh, conditional reconfiguration), `FailbackRegistryRepository`'s 
retry timer is killed, silently breaking registration retry.
   - 
   Suggested fix:
   Do not call `timer.shutdown()` in `close()`. Only cancel the service's own 
`timerTask`. Use `WheelTimerFactory.newWheelTimer()` for a private timer 
instance if shutdown is required.
   - 
   Confidence: High
   - Related existing: none
   
   ---
   _Identified during the 2026-08-02 deep re-scan; full list in 
[`docs/scan2-2026-08-02/06-medium-tiers.md`](docs/scan2-2026-08-02/06-medium-tiers.md)._


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