Aias00 opened a new issue, #6759:
URL: https://github.com/apache/shenyu/issues/6759

   - severity: Medium
   - files: 
`shenyu-plugin/shenyu-plugin-fault-tolerance/shenyu-plugin-sentinel/src/main/java/org/apache/shenyu/plugin/sentinel/handler/SentinelRuleHandle.java:59-93`
   - description: `handlerRule` builds the new global rule set by 
`FlowRuleManager.getRules().stream().filter(...).collect(...)` then 
`flowRules.add(rule)` then `FlowRuleManager.loadRules(flowRules)`. This 
get→filter→load is not atomic across concurrent rule sync events: two 
concurrent invocations each snapshot the pre-existing rules and each add only 
their own new rule; the second `loadRules` overwrites the first.
   - impact: Concurrent rule create/update/remove events silently drop Sentinel 
flow/degrade rules.
   - suggested_fix: Serialize the get-filter-load sequence or use Sentinel's 
per-resource rule API.
   - confidence: Medium
   - related_existing: none — #4668 is a general optimization, not this 
specific race.
   
   ---
   _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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